Faced with the rapid development of heating situation, many southern cities have begun to gradually explore the implementation of central heating. Some places in Shanghai actively explore distributed energy supply. Shanghai Shenneng Energy Service Co., Ltd. is the earliest new energy service enterprise in China. The company has launched a distributed energy supply demonstration, providing cogeneration to some hospitals and large enterprises through natural gas distributed energy supply system, and plans to expand to residential areas. In 2006, Wuhan City, Hubei Province started the "warm in winter and cool in summer" project, which took central heating as a livelihood project, aiming at solving the problem of central heating for residents by laying a perfect urban heating pipe network. In 20 12 years, the project has benefited more than 20,000 families. Other small and medium-sized cities such as Huangshi, Hubei and Jiujiang, Jiangxi have also begun to implement cogeneration central heating projects.
According to the current regulations, the heating areas in China are generally North China, Northeast China and Northwest China where the annual average temperature is less than or equal to 5℃ and the weather lasts for more than 90 days. The dividing line between north and south heating is Qinling-Longhai line, and the room temperature standard for central heating in northern China is 16℃- 18℃. (Sina. com)
According to statistics, since 20 13, 65438 10/4, the discussion on whether central heating should be adopted in the south has triggered a hot discussion among tens of millions of netizens on the internet. Through investigation, it is found that 80% netizens in the south agree with southern heating, but they are all worried that southern heating will not work. On this topic, the reporter made a special trip to interview Yin Huilai, deputy of Heilongjiang Provincial People's Congress and chairman of Zhonghui Geothermal.
Yin Hui said: "A warm house is the greatest livelihood. Who says heating in the south is not working? Although it is extremely difficult to implement central heating in existing buildings in the south, there is no problem in new buildings. I think the best' solution' is to vigorously promote building energy efficiency in new projects in the south and reach the national building energy efficiency standards. In this way, both air conditioning in summer and heating in winter will greatly reduce the energy consumption of electricity, coal and gas. Just like electricity and water, one household solves it, and one household solves it. Heating can also be achieved.
"At present, only two countries in the world use central heating on a large scale: the former Soviet Union and China. We don't always think about central heating, because building energy consumption is the biggest problem that restricts heating in the south. As long as the problem of building energy consumption is solved, many advanced technical products can be used to meet the market demand of decentralized heating and central heating in the south. For example, efforts on new materials, new technologies, measurable and intelligent heating products not only conform to the national conditions of China, but also conform to the architectural characteristics of China, and meet the needs of the north-south heating market. Therefore, we should consider the problem comprehensively and not be stubborn. As far as heating in the south is concerned, it is necessary to adjust measures to local conditions. Now there are many similar heating products and schemes at home and abroad. They can realize the functions of household, room, central heating, centralized control and remote control, and can adjust their temperature at any time through the Internet and mobile phone clients. These new intelligent heating products can definitely break the dilemma of winter heating for southern residents. Let the elderly, children and more families in the south have a warmer, more comfortable and healthier living environment. "20 12 During the National People's Congress held on March 5th, Zhang Xiaomei, a member of Sichuan CPPCC, pointed out in the proposal of" Central Public Heating in the North Extends to the South "that the traditional Qinhuai heating hotline is out of date, and the cold weather in the south is far more difficult than that in the north. In addition, the southern region has frequently suffered from "cold winter" since 2008, so public heating should be extended to the south. " Because there is too much rain and humidity in the south, sometimes it seems that the temperature is only about 0℃, which is actually much colder than the dry and cold temperature of MINUS 5℃ in the north, or even MINUS 10℃. "When Zhang Xiaomei was 4 years old, she lived in Sichuan with her parents and was very familiar with the weather in the south." Because there is no public heating facilities, winter in the south is actually more difficult than in the north. In addition, the south is cold and humid and prone to arthritis and rheumatism. In recent years, there have been several "cold winters" in southern China. Since the first frost of 20 12, strong cold air has rapidly moved south several times, with heavy snow in Jiangsu and Zhejiang, freezing in Guizhou, Hunan, and even the northern areas of Guangdong and Guangxi, which were mostly warm as spring in previous years, were frozen with snowflakes flying. In the early days of liberation, it was reasonable for the state to establish the Qinling-Huaihe River supply hotline, taking into account the level of economic development at that time. After more than 30 years of reform and opening up, the country's strength has increased and people's living standards have improved. It is also reasonable for some cities in the south to ask for central heating. "Southern cities generally use air conditioners and electric heaters to spend the cold winter, which not only wastes resources, is not conducive to energy conservation and emission reduction, and increases people's economic burden, but also has security risks," Zhang Xiaomei said.
In view of this, Zhang Xiaomei suggested that central heating should be provided to the southern region, and the Huimin project should be included in the national Twelfth Five-Year Plan. The national and provincial levels should invest in construction funds according to the amount of key projects, and the heating subsidies for urban and rural residents should be included in the fiscal budget. Jiangsu, Zhejiang, Shanghai, Hubei, Anhui, Jiangxi, Guizhou, Yunnan, Chongqing, Sichuan and their adjacent areas in the Yangtze River valley have a population of 4.5 billion, accounting for 2/5 of the national GDP. If we can make up our minds to implement central heating in winter, we can not only improve the quality of life and happiness of people in southern China, but also stimulate domestic demand, because the heating service market contains huge business opportunities. 20 13, 1 at the beginning of the year, the temperature in most parts of the country continued to be low. Southern heating has become the focus of social attention. Whether the south needs heating, how to heat it in the south, and what are the difficulties in heating it in the south are hotly debated online and offline.
The famous program host Murphy called for central heating in the south.
Morphy: This winter is the coldest winter in Nanjing in ten years, and the topic of whether central heating is needed in the south is once again put on the table. According to reports, some experts said that the south is not suitable for central heating, because southern residents are used to the wet and cold climate in winter. If central heating is carried out suddenly, it may cause discomfort to residents. Please, experts, can you find a reason that conforms to the normal intelligence level? Ps: Can you announce the name of this expert?
Murphy: The two sessions will be held soon. In this coldest winter in 28 years, if the deputies from southern provinces don't have better proposals, they might as well provide another warm-up service. Although this matter is big and complicated, it is related to people's livelihood and should listen to public opinion; Although it may be plain, it must be plain and strive for it! Yesterday's People's Daily poll showed that about 80% people were in favor of central heating in the south. What about you?
Economist Li Zikai: Southern China is not suitable for traditional central heating.
Li Zikai: Should it be heated in winter in the south? It is originally a question of whether southerners are willing to spend money to keep warm in winter. Now it becomes a question whether the government should spend money to keep southerners warm in winter. It is estimated that similar questions with preset answers will emerge one after another in the future, pushing the tax higher and higher. The law is: when it comes to the field of public policy, many people's intelligence immediately degenerates to the fickle monkey level.
Li Zikai: Central heating, which cannot be measured by households, has caused endless social problems and interpersonal contradictions in the north. If it is extended to the less cold south, it will only create more troubles and disputes. The government is right to refuse to build such public facilities. Families in the south who want to keep warm already have their own heaters, electric heaters and other facilities.
Li Zikai: Central heating in the north is combined with unit system. How many buildings do employees live in, and the heating costs of these buildings are borne by the unit. This outdated welfare system has long been difficult to maintain after the disintegration of the unit system. But in order to maintain heating, I don't know how much government subsidies are. But after all, wool is on sheep. There will be no free lunch and no free heating.
Yin Huilai, the representative of Heilongjiang Provincial People's Congress and the father of electric heating in China, opened up a new direction of heating in South China.
Yin Huilai: At the National People's Congress on 20 12, Zhang Xiaomei, a member of the Chinese People's Political Consultative Conference, submitted a proposal suggesting that central heating should be implemented in winter in southern China. However, the above proposal has not been recognized at the policy level, and the voice of central heating in the south is still "loud thunder, little rain". To sum up, it is very difficult to implement central heating in the south, while urban residents in the south have an urgent need for winter heating. At the 8th Green Building Conference held in March 20 12, Chou Baoxing, Vice Minister of Housing and Urban-Rural Development, publicly stated that central heating cannot be blindly copied to the south of Huaihe River in Qinling Mountains, which is a great threat to energy consumption.
Yin Huilai: Actually, the "central heating" here refers to the traditional central heating mode in the north, which is not suitable for moving to the south to use photos. Whether the south needs heating, which everyone is discussing, is another question. Moreover, this is an unquestionable problem. As early as 2008, I have put forward the view that the south needs heating. But what is needed is a more environmentally friendly and suitable heating method. 20 10 Zhonghui geothermal, as the largest electric heating enterprise in China, has provided the most suitable solution for southern heating, and has been successfully implemented in many public and civil buildings in Jiangxi, Jiangsu, Hunan, Zhejiang and other places, and has been widely recognized. This is the heating that is really suitable for the south.
Netizen: Raise your hand in favor, and hope to realize it as soon as possible!
Once this proposal was published by Zhang Xiaomei's blog and Weibo, it immediately drew applause. "Good proposal, support! I am a person who came from the north to settle in the south. Winter in the south is much sadder than winter in the north. I really hope that this proposal can be adopted and implemented as soon as possible. Winter in the south is really like a year. Staying indoors is like pouring cold water on your body, from your skin to your heart! Go to the north or America in winter to avoid freezing to death! I never thought about why public heating only benefits the north, but I don't know if this proposal of bloggers can come true. I am looking forward to it! ! ! "... it is not difficult to find from the message that almost all netizens voted for the proposal. Among the netizens who left messages, they came from southern cities such as Wuhan, Suzhou, Hangzhou, Chengdu and Guangzhou.
Minsheng charity
Qu, member of the Chinese People's Political Consultative Conference and deputy director of the Environmental Protection Department of Guizhou Province: It is necessary to implement heating in the southern region, especially in the Yangtze River basin. According to statistics, from 196 1 to 20 1 1, there were 104 provincial freezing processes in Guizhou. The room temperature standard for central heating in the north is 16℃- 18℃, while the average temperature in winter in most parts of the south is lower than 16℃. When there is rain and snow, the temperature in the Yangtze River basin is generally lower than 10℃, and the extreme minimum temperature is below 0℃.
Ge Junbo, member of the Chinese People's Political Consultative Conference and director of the Department of Cardiology, Shanghai Zhongshan Hospital: It's as cold inside and outside. Sleeping and getting up is a test, which is the personal experience of many southerners. When I was in my hometown in Shandong, my feet were never frostbitten. I arrived in Shanghai twenty years ago, and I was frostbitten that year. Once the temperature drops sharply in the south, the number of outpatient and emergency services in hospitals will increase significantly, especially for patients with cardiovascular and cerebrovascular diseases and respiratory diseases. Heating in the south is a good thing.
Chen Zhenlou, a deputy to the National People's Congress and a professor at the School of Resources and Environment of East China Normal University, said: The Qinling-Huaihe line is a general "heating dividing line", and the "one line determines the north and south" is not rigorous, but if heating is to be extended to the south, where should the next line be drawn? As a large-scale and systematic public service, heating involves many aspects such as planning, construction, energy, finance, technology, talents, etc., and the southern region also lacks corresponding experience, so it should be "decided before moving" and not hastily launched.
Repeated work, low utilization rate and huge energy consumption after completion.
Some experts are against central heating in the south. Besides high construction cost, low utilization rate after completion and waste of equipment, the biggest reason is energy consumption. Some experts have calculated an account. The heating methods adopted by residents in southern cities, such as electric heaters and air conditioners, consume 6 to 8 degrees of electricity per square meter every year, which is equivalent to two to three kilograms of coal. While central heating consumes 15 to 20kg of coal per square meter every year. If central heating is promoted in the south, it will bring huge energy consumption.
Shen Herong, chief equipment engineer of Wuxi Architectural Research Institute, said, "Compared with the north, the heating time in the south is short, and the utilization rate of equipment is low after completion, which will cause equipment waste and increase annual operating expenses. Moreover, for southern residents, they are used to the wet and cold climate in winter. If central heating is suddenly increased, it may cause discomfort to residents. "
Is it "centralized integration" or "unification and separation"?
Wen Huazhi, a deputy to the National People's Congress and a "national moral model" in Hunan Province, said that the southern region should make scientific planning, implement central heating in suitable places, and adopt "centralized heating and household metering" to prevent waste of resources. It is suggested that the central heating projects in Hunan and other provinces should be included in the national Twelfth Five-Year Plan, the construction funds should be invested by key projects at the national and provincial levels, and the heating subsidies for urban and rural residents should be included in the fiscal budget.
Member Qu: Public heating does not mean "one size fits all" in the city. In some areas, "single household" heating mode can be adopted, and the heating time changes according to the temperature change. For example, some ground source heat pump systems used in southern China use shallow ground energy for heating and cooling. In winter, heat is transferred from underground soil to buildings, and then underground cold energy is transferred to buildings in summer, forming a cold and hot cycle every year.
Zhang Quan, deputy to the National People's Congress and director of Shanghai Environmental Protection Bureau: Heating is very important, and we should also pay attention to keeping warm. It is necessary to effectively improve the "warm quality" of buildings. The construction of "thermal insulation buildings" and "thermal insulation residential areas" may have a large initial investment, but the long-term benefits are also great. Government departments should actively guide the promotion and formulate standards and norms in a timely manner.
If the city is solved, what about the countryside?
Wei, deputy to the National People's Congress and chairman of Guizhou Water Mining Group: There are two main reasons for the lack of heating conditions in rural areas in the south: First, the scattered residence and the high construction cost of heating equipment such as pipelines make it difficult to achieve large-scale heating; Second, the thermal insulation effect of rural houses is not good. Geological conditions and building structure are not conducive to thermal insulation. In addition, humid air permeates everywhere, so we can only rely on burning coal for fire and air conditioning for heating. The most realistic way is for the government to give appropriate subsidies in electricity consumption and coal purchase to reduce the heating burden of farmers. At the same time, through "direct monetary subsidies", the masses will be allowed to change their stoves and prevent endemic fluorosis.
Deng Zhihong, deputy to the National People's Congress and county magistrate of Panxian County, Guizhou Province: The vast rural areas in the south mainly rely on coal for heating, and the effect is not good, which affects the environmental quality. In the long run, with the increase of urbanization rate, the improvement of farmers' concentrated living degree and the gradual improvement of heating conditions, rural heating can be gradually realized. In particular, some cities that are rich in resources and energy and have planned to build central heating facilities can consider extending to small towns with dense population and relatively concentrated residence around them. The national average temperature is the lowest in the past 28 years.
Every winter, the sound of central heating in the south rises. Although the land is divided into north and south, people are no different. Why do northerners have heating, and the four seasons are like spring, but the government still subsidizes it? Do southerners have to put up with it or find their own way? On the other hand, must the south take the old road of the north? If central heating is also provided, can energy support it?
This newspaper launched a series of surveys, and today is the first one.
The temperature in the south is also very low.
The national average temperature is the lowest in the past 28 years. The Central Meteorological Observatory predicts that large-scale rain and snow will occur again in southern China on the 8th.
How cold is it in the south? Our reporter went to Shanghai, Nanjing, Hangzhou, Hefei, Nanchang, Wuhan, Changsha, Chongqing, Chengdu, Guiyang and other southern/kloc-0 cities, and took thermometers to measure the temperature outdoors, in unheated families, self-heating families, central heating communities, large shopping malls, provincial (municipal) government buildings and other places.
Most native Shanghainese hate winter most every year: less sunshine, more humidity and more cold, and they have to endure the winter of about 130 days from 65438+February to March of the following year.
Hangzhou citizens spent several days in rain and snow, and the temperature dropped again and again, with the lowest temperature reaching MINUS 4 to 6 degrees Celsius. Moreover, the typical "wet and cold" taste in rainy and snowy days in the south is much worse than that in the same temperature in the north.
This situation is also a true portrayal of Guiyang thousands of miles away.
In winter in Guiyang, although the temperature is not very low compared with the north, and the time below 0 degrees Celsius is not long, because of the high climate and humidity in Guiyang, the cold wind blows every winter.
Around New Year's Day, Guizhou experienced a large-scale strong cooling weather process. Walking on the streets of Guiyang, pedestrians wearing down jackets, earmuffs and snow boots abound.
When the reporter investigated in Chengdu, he also found that the indoor temperature in Chengdu is not particularly low, but the humidity in Chengdu is very high, and people will feel particularly cold.
The weather in the main city of Chongqing is gloomy. The outdoor temperature measured by the reporter with an alcohol thermometer in the main city is 5 degrees Celsius, and it feels obvious atomization.
In Changsha, the outdoor temperature has been decreasing since 1 month, and shopping malls have become the hottest places. The temperature in the mall makes people feel as if it is another season.
The torment without heating
The temperature in Nanjing is 3 degrees Celsius. In a low-rise bungalow in Xinmin Road, Xiaguan District, Sun, in his 80s, sat at the door in a thick cotton-padded jacket to keep warm. This particularly cold winter is particularly difficult for the elderly.
Mr. Fang, who has just arrived in Wuhan, wears a down jacket at home, whether eating or watching TV, which is even more bloated.
"You have to wear as many clothes as you wear outside, and sometimes you have to wear more." Mr. Fang stamped his foot and said that the cold in Wuhan was mixed with moisture, which was biting to the bone and he couldn't stand wearing more clothes.
In Shanghai, many residents are in a dilemma: turn on the air conditioner and use at least four or five Baidu per month. You know, the standard of the first step of Shanghai ladder electricity price is only 1560 degrees, and the annual quota will be gone in one winter; If you don't turn on the air conditioner, you can only "bow your head and shrink your neck" and be fully armed.
For many Hangzhou citizens, they are afraid to take off their down jackets when they return to the same cold home from the cold outdoors. Even if the air conditioner and electric heater are turned on, it will be a little hot after a long time. Often the air conditioner is turned on all night, and the indoor temperature does not rise by several degrees. At night, my hands and feet get colder.
In Hefei, many residents say that the winter in Hefei is very difficult, and bathing and getting up mean severe challenges.
In the home of Ping Xu, a citizen of Nanchang, the reporter saw that the living room had a floor-standing air conditioner of 1, and each of the three bedrooms had a hanging air conditioner; There are also electric heaters and hot water bottles. Everyone in the family should wear thick cotton-padded clothes, which is the same as dressing outdoors. The air conditioner in the living room at home is not turned on at ordinary times, only when it is particularly cold or when guests come. Usually sitting next to a small electric heater to keep warm.
Residents called for central heating.
On the local online forum in Hangzhou, there are many voices eager for central heating: "If Hangzhou uses pollution-free natural gas for heating, and the price is reasonable, the people will certainly welcome it with both hands and feet." "Heating is not expensive, but it is cheaper than electricity. And every room is very warm, unlike air conditioning, which is only one to one. "
In Hefei, central heating has been supported by everyone. Many people who come to work and live in Hefei from the north call it too cold in winter in the south and call for indoor central heating as soon as possible.
In Guiyang, many residents report that the electricity bill at home has risen sharply in winter, most of which is caused by heating with electrical appliances. Residents hope to provide central heating facilities, which can not only save electricity, but also solve the problem of indoor heating in winter.
In Nanjing, for a low-income family like Sun, there is no air conditioner or electric heater, so the way to keep out the cold is primitive: keep warm during the day and use hot water bottles at night. Whether central heating is adopted or not, the government should consider not enjoying a warm family in this cold winter.
Southern cities also tried central heating, and residents benefited from it.
Nanchang Mantingchun Community is a rare central heating community in the urban area. The reporter just arrived at the door of resident Xu Chunmei's house, and a hot air came on his face. After sitting in the house for a while, he felt warm all over and had to take off his thick down jacket.
The residential area uses shallow geothermal resources to realize central heating and provide heating for residents 24 hours a day. Since this winter, in the past two months, according to the heating cost per square meter of 5 yuan, the Xu Chunmei family spent 420.40 yuan.
"It's really warm in the room now. Winter is much more comfortable than before. Unexpectedly, we also enjoyed the heating! " Xu Chunmei's wife said happily. Suggestion 1: the heating problem in the south should break through the system and provide it on demand.
For the heating problem, we should first make a breakthrough and reform in the system and policy, and keep pace with the times to dynamically define the north and south according to the actual situation of urban temperature, rather than being static. In this way, the regional dispute over heating privileges between the north and the south can be solved, and the research on the problem can be returned to science.
The south is really extremely wet and cold, but this is mainly the feeling outside, and the indoor temperature is generally above zero, and the human body feels much better than the outdoor. Because central heating only increases the indoor temperature, it can't make the whole city hot, which means heating can't solve the problem of wet and cold. On the whole, the universality of heating right still needs to be provided by the concept of scientific development and resource conservation according to the actual situation and specific needs. For example, in some remote rural areas where electricity supply is tight and air conditioning cannot be used for heating, central heating can be carried out, while for ordinary urban buildings, electric heating is still the main method, rather than simple comprehensive planning.
Recommendation 2: Central heating is unrealistic and alternative methods should be considered.
Winter in the south is really cold, especially along the Yangtze River. Over the years, after global warming, water vapor evaporation has increased, but winter has become colder and wetter, so heating in the south is a very realistic problem. But heating and large-scale central heating are two levels of problems. First of all, large-scale heating is very uneconomical. For example, in some particularly cold areas in the north, the heating period may reach 2 10 days, in some places it may reach 180 days, in Beijing it may reach 120 days, in Shandong and other places it may reach about 90 days, while in some places in the south it may reach less than 60 days, and in some places it may even reach more than 40 days. If such a complex urban pipe network system is built in such a short heating period, the annual operation time is very short, and the groundwater level in the south is very high, and the damage rate of the pipe network is very high, which is definitely not suitable from the economic point of view.
Moreover, the bigger problem in the south is probably not the problem of central heating, but improving the thermal insulation level of buildings. Most of the south is single glass, and the north is double glass. Three layers of glass have been installed in some places in the northeast, and even the glass inside has been evacuated and filled with nitrogen. The wall is internally and externally insulated, and part of it is internally and externally insulated, so the overall thermal insulation coefficient is very high. Coupled with the continuous heating in the north, the actual heating amount per square meter is very limited, while the south is very humid, and dehumidification will consume a lot of energy. In addition, the window of the house leaks air and the thermal insulation coefficient is very low, so the energy consumption is very high. Therefore, it may be more important to improve the level of energy saving and solve the heating problem according to local conditions. China is experiencing the coldest winter in 28 years. The continuous low temperature weather in many provinces and regions in southern China has caused residents who generally lack heating facilities to complain. The heating problem in the south is concerned. The researchers said that the academic community basically reached a consensus that it is not appropriate for the south to copy the "big and complete" central heating model in the north, otherwise the energy supply will face tremendous pressure and the cost will be high. The focus of the debate is how to heat in the south. Some experts believe that decentralized heating should be adopted to encourage the use of new energy sources. Some experts believe that in ten years, the North will learn from the South model.
The National Development and Reform Commission set up the Southern Winter Heating Research Group. The person in charge said that winter heating in the south is still in the path design stage. According to the news at the beginning of 65438+ 10, since the end of 2012165438+10, the national average temperature has been -3.8 degrees Celsius, the lowest in the last 28 years. As the temperature drops, the heating problem in the south is concerned. What's more, because some media reported that "experts say that southerners are used to wet and cold, and sudden central heating may lead to physical discomfort", the heating problem in the south suddenly heats up.
At the National "Two Sessions" in March 20 12, the proposal of "extending central heating in the north to the south" put forward by Zhang Xiaomei, a member of the Chinese People's Political Consultative Conference, received media attention. 654381Oct 8, Zhang Xiaomei said that in recent years, the southern provinces and cities have been frozen for thousands of miles, and the people in the Yangtze River basin have suffered from the cold winter. Not only in Zhang Xiaomei, but also in Hunan, Hubei, Jiangxi, Jiangsu, Guiyang and other places, deputies to the National People's Congress and members of the Chinese People's Political Consultative Conference (CPPCC) have put forward proposals and suggestions for the southward relocation of heating lines. Chi Li, a representative of Wuhan Municipal People's Congress, said: "With the development of the city, the standards of infrastructure and public services should also be improved, and we should not stay at the lower limit of not freezing people to death." However, for many years, central heating in southern winter has been in the appeal stage. 65438+1October 1 1, the Beijing News reporter learned that the National Development and Reform Commission has established the Southern Winter Heating Research Group. Yang Limin, head of the research group of the Low Carbon Research Center of the Macroeconomics Society of the National Development and Reform Commission, said: "This topic is still in the research stage, and some feasible paths are being explored." A "line" divides cold and warm.
Central heating in winter subsidized by the government is determined by a "line", which has been used for 60 years and is now frequently questioned. Chen Zhenlou, a professor at the School of Resources and Environmental Sciences, East China Normal University, introduced that in 1908, Zhang, the first president of the Chinese Geographical Society, proposed that Qinling-Huaihe River should be the dividing line between the north and the south of China from the perspective of physical geographical division. It is the geographical and climatic boundary of China. Qinling Mountains can block cold and hot air. The south belongs to temperate monsoon and subtropical monsoon climate, the lowest temperature in winter is not lower than -5℃, and the duration of low temperature is short. The original intention of this line is to provide reference for local buildings and crop cultivation. According to Chou Baoxing, deputy director of the Ministry of Housing and Urban-Rural Development in charge of urban heating, in the 1950s, under the background of "energy shortage", Zhou Enlai proposed to demarcate the central heating area in the north with the Qinling Mountains and Huaihe River as the boundary.
This is the source of China's "North-South Heating Line". "It is not strict enough to use the Qinling-Huaihe line as the heating boundary." Chen Zhenlou of East China Normal University pointed out that with the global climate change, El Ni? o and other phenomena led to frequent extreme climate and cold current moving southward, the most typical case being the ice disaster in the south in 2008. "There is no doubt about providing a comfortable and healthy indoor environment and heating when heating is needed." 65438+1October 1 1 Jiang Yi, an academician of China Academy of Engineering and a professor at the School of Architecture of Tsinghua University, said.