Air energy water heater
Principle: By using the principle of inverse Carnot cycle, heat can be absorbed from the air, and 2-3 parts of heat can be absorbed from the air by consuming 1 part of electric energy, so that 3-4 parts of hot water with heat can be made.
Advantages:
1. saving energy and money: absorb a lot of heat energy from the air, and the energy efficiency ratio is as high as 300%~400%, which is equivalent to consuming 1 part of electricity to generate 3~4 parts of heat. To make the same amount of hot water, the cost is only 1/4 of electric water heater, 1/3 of gas water heater and 1/2 of solar water heater.
2. Safe and pollution-free: Water and electricity are completely separated in the structure of air energy water heater, and there is no danger of electric shock. Secondly, air can absorb heat from the air, so it is environmentally friendly and pollution-free.
3. Convenient installation: beautiful appearance, can be used as indoor or balcony furniture, and occupies a small area.
4. Intelligent constant temperature control: the air energy water heater adopts intelligent control, and automatically adjusts the operation of the machine according to the water temperature, so that the water temperature in the energy storage tank is constant and can be used at any time without waiting, and the power consumption is low.
5. Wide application range: it can be used in the range of -25℃~48℃ and is not affected by rainy weather.
6. Long service life: low maintenance cost, stable equipment performance, and service life exceeding 10 year.
Disadvantages:
1. The initial investment is large and the price is generally high. It will take about two years to recover the initial investment.
2. The air energy water heater will decrease with the decrease of the external environment temperature, so it will take a long time to make hot water in winter.
3. Large volume and limited installation place. The external machine can only be installed on the balcony, terrace and external wall, and the distance between the external machine and the water tank is generally not more than 3 meters.
Air energy water heater
solar water heater
Principle: Sunlight passes through the first glass of the heat absorption tube and shines on the black heat absorption layer of the second glass to absorb the heat of solar energy. Because the two glasses are vacuum insulated, the heat transfer will be greatly reduced, and most of the heat can only be transferred to the water in the glass tube to heat the water in the glass tube.
Advantages: Solar energy is used as heating energy, so compared with electric heating and gas water heaters, it is very energy-saving and environment-friendly, and will not produce other pollution and waste. It's also safer.
Disadvantages: vulnerable to the weather, the ability to make hot water is greatly reduced in rainy days or winter, and there is often a phenomenon that water cannot be burned. Only electricity can be added to assist heating, but the operating cost will be higher; The installation is complicated, and it is usually installed in a place with high sunshine; Maintenance is more troublesome, because solar water heaters are installed outdoors, mostly on the roof and roof, which is difficult to maintain; If the distance between the roof and the water outlet is less than 3 meters, the water outlet pressure is too small, so it is uncomfortable to take a bath, and a booster pump is needed. Moreover, there is a time limit for water supply, and water supply is not allowed after exposure at noon, otherwise the pipe may be blown up.
solar water heater