Automotive water cooling system consists of water pump, radiator, cooling fan, thermostat, compensation bucket, water jacket in the engine block and cylinder head, as well as other auxiliary devices. The principle of operation of the cooling system is to circulate the liquid through the pipes and passages of the engine. As fluid circulates through a hot engine, it absorbs heat, thereby lowering the engine temperature. Once the fluid has passed through the engine, it then flows to a heat exchanger (or radiator), where the heat from the fluid is dissipated into the air.
The maintenance content of automobile cooling system is as follows:
1. Selection of cooling water: low hardness river water, such as well water, should be boiled and softened before use. It is best to use antifreeze;
2. Pay attentionion to the technical condition of each part: if the radiator leaks, it must be repaired. If the water pump or fan is broken. if it rotates or makes abnormal noises, it should be repaired in time. If the engine is overheating, you should quickly check for water shortage. If there is a lack of water, stop the engine. After cooling, add sufficient cooling water. If the thermostat does not work properly and makes the engine operating temperature too high or too low, it should be repaired or replaced in time
3. Inspection and adjustment of fan belt tightness: If the thermostat The fan belt tightness is too weak, this will not only affect the cooling air volume increases the workload of the engine and accelerates belt wear due to slipping. If the belt is too tight, it will accelerate wear on the water pump bearings and generator bearings.misser. Therefore, the tightness of the belt should be checked during use and adjusted if necessary. If it does not comply with the regulations, it can be adjusted by changing the position of the generator and the adjustment arm
4. Clean the scale regularly: after a certain period of engine use ; will be deposited in the water tank and radiator, which will affect heat dissipation. Cleaning must therefore be carried out regularly. The cleaning method is to add enough cleaning fluid into the cooling system, soak it for a while, start the engine and clean it. run it at low and medium speed for a while, release the cleaning fluid while it's hot, then rinse it with clean water.
Principle: Sunlight passes through the first glass layer of the heat absorbing tube and shines on the absor black layerbating heat from the second layer of glass, absorbing heat from solar energy. It is vacuum insulated, so the heat transfer will be greatly reduced (radiation heat transfer still exists, but there is no thermal conduction or thermal convection), and most of the heat will not can be transferred only to the water inside the glass tube;
Usage The water in the glass tube is heated, and the heated water flows upward along the heating surface of the glass tube into the insulated water storage bucket. The relatively low temperature water in the bucket enters the glass tube along. the backlit surface of the glass tube for replenishment. This continuous cycle makes the water storage tank insulated. The water in the bucket is continuously heated to achieve the hot water target.
Photothermal use: it collects energy from solar radiation and convets itrtit in thermal energy by interaction with the matter for purposes of use. Currently, the most commonly used solar energy harvesting devices include flat plate collectors, evacuated tube collectors and focused collectors. Solar Power Generation: Large-scale use of solar power in the future will be used to generate electricity. There are two main ways to use solar energy to generate electricity:
Light-heat-electricity conversion. In other words, the thermal energy generated by solar radiation is used to produce electricity. Generally, solar collectors are usedThe absorbed thermal energy is converted into steam as the working fluid, and then the steam drives a turbine to drive a generator to produce electricity. The first process is light-heat conversion, and the second process is heat conversionur-electricity. Conversion of light into electricity. Its basic principle is to use the photovoltaic effect to directly convert solar radiation energy into electrical energy. Its basic device is a solar cell.
Photochemical use: This is a photochemical conversion method that uses energy from solar radiation to directly split water to produce hydrogen.