If only the warm air is turned on in winter, it really doesn't cost much oil, but other operations may increase fuel consumption when the warm air is turned on.
Why doesn't it cost oil to turn on the warm air?
The warm air actually uses the waste heat of the engine.
To blow out warm air, the air conditioner must have a heat source to heat the air.
Above the oil tanker, the engine is naturally a heat source, so the warm air of the oil tanker is actually waste utilization, using the waste heat generated by the engine.
The principle is very simple, that is, let the engine coolant circulate more, introduce hot water into the heat exchanger, and then blow the air through the heat exchanger with a blower, and the air becomes hot.
It's like the water left over from boiling eggs and noodles is directly used to wash dishes, so there is no need to pick up hot water, right?
The heating system itself is not very powerful.
Some friends may ask: "Even if the heating is oil-free, the operating cost of the heater itself is oil-free?" "When the blower turns, you don't need electricity?" In fact, this part of energy consumption is really not high.
Liu Baoguo and others published a paper "Design, Calculation and Analysis of Automobile Electric Power" in the magazine "Automotive Practical Technology", which said: The power of automobile heaters is generally only about 65W.
What concept? A fast charging power of the mobile phone can turn on the warm air for one day, which is about 1 kWh, which is basically negligible for the engine.
Just like 1 super powerful computer, hanging a notepad and opening an office program when playing games basically has little effect on the game.
What if the fuel consumption increases?
Since heating the warm air basically doesn't cost much oil, why do many friends leave me messages: the oil consumption has really increased in winter. What happened?
Many friends in the north will warm their cars in the same place.
In the case of 1, the news is all from the north, right?
If you just get on the bus in winter and your hands and feet are frozen stiff, you will choose to stay where you are for a long time to keep your car warm.
"When the heating is on and the car is comfortable, I will go in and drive." I don't like driving in a down jacket, do I?
While waiting for the warm wind, the oil is burning. Isn't that a waste? The waiting time may not be short. Generally speaking, the thermostat valve will not open until the coolant temperature reaches 85℃.
At this time, the coolant has gone through a big cycle and there is warm air in the car.
Generally, it takes 1 to 2 minutes for the cold car to start to the coolant temperature of 85℃, which is relatively fast. Friends in the north will definitely deny it, saying that 10 minutes has not been heated.
Huang Jianchuan, Wang Ziwei and others published a paper "Research on Comprehensive Utilization System of Automobile Waste Heat" in the journal of Shandong Chemical Industry.
Experiments have been done inside: Citroen Elysee is used. When the outside temperature is minus 3℃, the engine needs 1 10s to raise the water temperature to 85℃.
If it's a few degrees below zero 10 and 20 degrees northeast, it's even longer. It's hard to say 5 minutes, 6 minutes and 7 minutes.
Many friends in the south can turn on the air conditioner.
If you are not from the north, but the fuel consumption increases inexplicably, see if you have pressed the A/C key.
Friends in the south often encounter this situation: it is humid in winter, and if warm air is turned on, the glass may fog.
In order to remove fog, the air conditioning button is always on. Turning on the air conditioner means that the compressor of the air conditioner is turned on, and the fuel consumption will increase at this time.
Liu Miao, Jiang Jianli and others published a paper "Research on Energy Consumption Measurement System of Automobile Air Conditioning Compressor" in the journal of Measurement and Control Technology.
It says: car air conditioner is a high-energy-consuming accessory, accounting for 10% to 20% of car energy consumption, of which 50% is used to drive the air conditioner compressor.
Simply put, with the air conditioner on, if the fuel consumption per 100 kilometers is 10L, about 0.5 to 1L of engine oil will be used up by the compressor.
Of course, this is the case when the compressor is always started. In fact, many cars now have smart air conditioners.
Even if the air conditioner is always on and the temperature is below a certain level, the compressor will not work.
For example, Passat's instructions say that the dehumidification function will only work if the temperature is higher than 3℃.
So the actual increase in fuel consumption may not be as much as1L.
Some cars have electric heating, which also increases fuel consumption.
There are also some cars, such as Camry twin engines and Ralink twin engines. In order to ensure that the car has enough heating capacity just after the engine is started, there is an additional electric auxiliary heating function.
Li et al. of Dongfeng Honda Automobile Co., Ltd. published a paper in Refrigeration and Air Conditioning, analyzing the heating mode of automobile air conditioning.
It reads: In order to make up for the decrease of heating effect caused by insufficient engine water temperature in some cases, the car will be equipped with a low-power PTC core to improve heating performance.
The PTC core, which sounds very ... strange, is actually similar to the small solar heater we use at home to heat according to the notes.
Extra electricity is needed, so it will also increase some fuel consumption, but the impact is relatively small.
Tested by a car home, the PTC heating 1 hour on an electric vehicle is about 4.5 kwh.
If PTC heating is used for oil vehicles or hybrid vehicles, the power is generally not so great, so the increased energy consumption will not be particularly exaggerated.
Under normal circumstances, it really doesn't cost much oil to turn on the warm air.
So generally speaking, it really doesn't take much oil to turn on the warm air under normal circumstances.
But it is not fuel-free. If it is a hot car in the same place, wait until the warm air comes. If it is used normally for no reason, the fuel consumption will increase, and it may be used up while waiting.
Another one is that the air conditioner is turned on over there to demist, or forgotten to turn it off. Fuel consumption is real, and about 50% will appear. Of course, it varies from car to car.