I don't think it's very good. It looks high-end, but there are many problems with actually using it. If it is a solar water heater, it will be affected by solar radiation, bad weather and hot water. cannot be used as desired.
If you use photovoltaic power generation to heat the water heater, the investment cost is too high. In addition, photovoltaic energy production will also be affected by solar radiation. During the day, solar radiation is good and solar radiation is large. electricity production is high. If there is no sun at night, there will be almost no electricity generation, the water heater cannot be heated, not to mention there is a lot of electricity produced during the day, and it is very likely that this will happen. it will not be exhausted. Isn't it waste?
I think it is more reasonable to user directly to the photovoltaic plant. The photovoltaic plant is connected to the network to produce electricity. the energy generated during the day cannot be used, it can be connected to the national grid. When the power plant does not produce electricity at night, you can use grid energy at any time. The power plant produces electricity with state subsidies. The State subsidizes it to the tune of 0.42 yuan/kWh for 20 years. Different locations also benefit from local grants and incentives. In this way, the photovoltaic plant not only solves the problem of electricity consumption at home, but also. also brings benefits, killing two birds with one stone.
Types of Solar Water Heaters Solar water heaters can be roughly divided into the following categories:
1. From the heat collection part:
(1) Glass. Water heaterVacuum tube solar energy: can be subdivided into all-glass vacuum tube type, heat pipe vacuum tube type, U-shaped vacuum tube type/vacuum tube heat collection and heat storage drying type in the integrated sun. The most commonly used is the all-glass vacuum tube type, which has the advantages of safety, energy saving, environmental protection and economy. Especially solar water heaters with auxiliary electric heating function, which use solar energy as the main source and electric energy as the auxiliary energy source, so that the solar water heater can work normally all year round and the efficiency is still relatively high when the ambient temperature is low. Its disadvantages are that it is relatively large in size, the glass tube is fragile, scale is easily accumulated in the tube, and it cannot work under pressure.
(2) Flat plate solar water heater: It can be divided into tube plate type, winged tube type, snake tube type, flat box type, round tube type and heat pipe type . Its advantages: good integrity, long service life, few defects, low safety risks, capable of operating under pressure, safe and reliable, large heat absorption area, easy to combine with buildings, and strong resistance to heat. dry air. Its thermal performance is also. very stable. Its disadvantage is that there is no vacuum inside the cover and its thermal insulation performance is poor. Therefore, the heat collection performance is poor when the ambient temperature is low and consumes relatively much energy when using supplementary heating. Thermal efficiency is lower when the ambient temperature is low or when the leaving water temperature must be highee. If damaged by freezing, the entire heat collector plate must be replaced. It is suitable for southern regions where there is no ice in winter.
(3) Ceramic hollow flat plate solar water heater: Ceramic solar panels are thin-walled hollow flat box solar collectors with ordinary ceramic as the base and black porcelain on the base. vanadium-titanium with three-dimensional mesh as surface layer. Ceramic solar panels are made of porcelain material as a whole, which is waterproof, has high strength and good rigidity, does not corrode, does not age, does not fade, is not toxic, harmless and non-radioactive. the absorption rate will not attenuate and has high long-term photothermal conversion efficiency.
Tested by the National Solar Water Heater Quality Supervision and Inspection Center, the absorption ratesolar light ption of ceramic solar panels is 0.95 and the daily heat gain of concrete structure ceramic solar roofs is 0.95.The amount is 8.6 MJ, which is much higher to the national standard. Ceramic solar panels have low manufacturing and operating costs, do not attenuate the absorption rate of sunlight, and have the same lifespan as the building. They can be used to share the structural layer, insulating layer and waterproof layer with the original structure. is simple and the thermal insulation effect is better than the original roof. The concrete structure solar ceramic roof, sun wall and balcony guardrail integrated with the building provide hot water, heating and air conditioning to the building and provide thermal energy for industry; , agriculture and livestock; and can be used for solar hot water production at glarge-scale and wind power generation in deserts, seawater desalination, brackish water desalination and conversion of deserts to agricultural land.
2. Classification from structure:
(1) Compact solar water heater: the vacuum glass tube is directly inserted into the water tank, and the water in the water tank is heated . by circulating the rise in temperature of the heated water, it is the most classic solar water heater on the market.
(2) Split type water heater: The split type water heater separates the collector and the water tank, which can greatly increase the capacity of the solar water heater, does not use not the waterfall working method, and expands the scope of use.
3. Divided by the water tank pressure:
(1) Pressurized solar water heater: The water outlet of the solar water heater is under pressure. Generally, it works with water fromsurface and does not necessarily use a pressurized water tank.
(2) Pressureless solar water heater: Ordinary solar water heaters are all pressureless water heaters. The water tank has a pipe connected to the atmosphere, which takes advantage of the height difference between the roof. and the house. The water creates pressure. Its safety, cost and service life are much greater than the pressure bearing type.
Solar water heater is a device that converts solar energy into thermal energy, heating water from low temperature to high temperature to meet people's use of hot water in life and production. Solar water heaters are divided into vacuum tube solar water heaters and flat panel solar water heaters based on their structural shapes. Evacuated tube solar water heaters are mainly used, accounting for 95% of the domestic market share. Water heatersVacuum tube domestic solar panels are composed of heat collecting tubes, water storage tanks, brackets and other related parts. The conversion of solar energy into thermal energy mainly relies on vacuum heat collecting tubes which use the hot water principle. float and sink cold water to cause microcirculation in the water.