What is the difference between solar energy and air energy?

Solar energy: refers to the thermal radiation energy of the sun (see three ways of heat energy transfer: radiation), mainly manifested as the so-called solar rays, which are generally used to generate electricity or provide energy for water heaters.

Air energy: it is the heat in the air. Air used in life can generally use a small amount of electricity to carry the heat in the air to heat water and so on.

Difference: Take air energy water heater 2 and solar water heater as examples!

Air energy water heaters are more and more used in people's lives. It has many advantages such as safety, power saving, comfort and environmental protection.

Advantages 1. Save electricity, because the thermal efficiency of air energy water heater is as high as 300%-500%, which is 4-5 times higher than that of ordinary water heater, so the cost of making hot water is very low and it saves electricity. The daily electricity fee of air energy water heater is 1-2 yuan dollars, which can save about 70-80% of electricity fee per month compared with ordinary water heaters.

Advantage 2. Convenient and comfortable, it can automatically provide hot water all year round, rain or shine, which is more convenient than ordinary solar water heaters. Efficient dehumidification, the maximum dehumidification capacity is 6-8 kg every 24 hours, and the effect is more obvious in rainy weather, especially suitable for humid southern weather. Low noise. The air energy water heater adopts a closed silent compressor and adopts sound absorption treatment inside, so the noise is very low.

Advantage 3. Environmental protection, because the air energy water heater does not use gas, it will not produce waste gas, so it will not destroy the ozone layer, and because of saving electricity, every time the electricity consumption is reduced, the generation of 1.5 kg of carbon dioxide can be reduced during power generation, and the damage to the ozone layer can also be reduced. Therefore, the use of air energy water heaters can also delay "global warming" and purify indoor air.

Advantage 4. Safe. The air energy water heater does not use gas, which can completely eliminate the potential safety hazard of carbon monoxide poisoning. Will not be heated by the electric heating rod, thus eliminating the possibility of electric leakage. So it is safer.

Advantage 5. Many people can use it. When the temperature control setting of the air energy water heater reaches 55℃, it will automatically stop. With hot water, cold water will enter. When the temperature drops to a certain temperature, the system will automatically restart, and it can continuously generate 100-700 liters of hot water at 45-55℃ every hour. According to the test, the temperature of shower water for each person is 42℃, and the hot water is 40-50 liters. The air energy water heater can continuously provide showers for more than three people at one time. The normal shower time for three people will be 1 hour, so hot water can be replenished for more people to use.

Advantage 6. Air energy water heaters have a wide range of applications and use hot water for industrial production; Factory bath hot water and drinking hot water preheating; Hot water for hospital washing and bathing; Shower hot water in school or private student dormitory and company employee dormitory; Hotels, guesthouses and guest houses use a lot of central heating water; Hot water in bath center, restaurant and kitchen; Water for beauty salons and drinking water for kindergartens and schools are preheated; Domestic shower, bathtub and jacuzzi use hot water, which is especially suitable for middle and high-rise buildings, villa residents and users who use a lot of hot water; Household floor heating, radiator heating, fan heating hot water; All domestic hot water is used for car washing and washing.

Disadvantages: 1 It is easily influenced by the surrounding air environment. When the weather is cold and the ambient temperature is low, the amount of hot water generated will be slightly reduced. Especially when it is-10℃, it is easy to frost, and when it is lower than -20℃, the unit will stop working. Defrosting is an urgent problem to be solved at present.

Disadvantage 2. The air energy water heater is relatively large in shape and requires to be installed on the ground or roof, which requires a higher home environment.

Disadvantage 3. The compressor burns easily. At present, the circulating heating system is widely used in air energy water heaters on the market, which is easy to cause compressor aging and carbonization under high temperature and high pressure. If the lubrication effect of the system is not good, disadvantage 4. Heat exchangers and double-tube heat exchangers are prone to scaling and cracking, because the outlet water temperature of air energy water heaters can reach 50-60℃, and water is most prone to scaling in this temperature range. If the heat exchanger can't be cleaned regularly, it will break. For the plate heat exchanger.

Solar energy: Advantages: 1, energy saving, high efficiency, money saving, and no environmental pollution when used. Long service life, up to 15 years.

2, good temperature stability, as long as there is hot water in the water tank, there will be no phenomenon of first heating and then cooling.

Except in rainy days, solar water heaters don't need other expenses, such as gas and electricity. If you use the auxiliary electric heating device in rainy days, you must pay the electricity fee.

4. In rainy days, the solar water heater is still working, but the generated hot water temperature can't meet the needs of users for bathing, but the water in the water tank is warm, which is higher than that of ordinary tap water. Therefore, even if it is used in rainy days, it saves electricity compared with ordinary electric water heaters. Because there is no electricity or gas, there is no danger of electric shock or poisoning, so the safety of solar water heaters is very high.

Solar energy has its shortcomings, but solar water heaters also have their shortcomings, such as: 1, and the initial investment is large.

2. The installation location of solar water heaters is also very strict. In the city, only people who live on the top floor or own villas can install it.

3. The water that solar water heaters don't use for a few days is generally hot water, reaching above 70℃. Especially in summer, when the weather is sunny for more than two consecutive days, the water will boil, and the temperature will be appropriately lowered at night to keep the water temperature at 60℃-70℃ for a long time. This temperature area is an excellent temperature for bacteria to breed in water.