Solar water heater is a solar energy heating the water devices. Use of solar flat-plate collector, the water can be heated to 40-60 degrees, for families, institutions, corporate life, the production offers a bath, laundry, cooking and crafts, water use can also be used for the sun room, greenhouse, cooling and thermal power and other devices. Solar water heaters generally by the collectors, storage tanks, piping and auxiliary equipment loop composition.

Solar water heaters are usually placed in the top housing may also be placed in other sunny places. One morning with cold water in the afternoon you can access the hot water by solar heating. To the mid-20th century, the use of solar water heater technology has reached a mature stage. Solar water heater industry is the world’s solar energy industry in the backbone. Area of solar water heaters installed in China ranks first in the world. It is estimated that the use of these solar water heaters, coal can be saved every year at least 500,000 tons, has revealed its edge.

As people’s living standards continued to improve, the developing countries of the world’s people, the demand for hot water right Shenghuo Xunsu increase in small rural towns Hu vast, yet to a condition for gas or Dianlaitigong water, Renmen use of solar energy Re Shuiqi yes very natural and reasonable. At present, about 500 solar water heater factory, total output in 1997 reached 2.5 million square meters (light area), the total water heaters use more than 10 million square meters, hot water for the 30 million residents.

Solar water heater types are: stuffy sun heaters, no guts nausea sun heaters, water heater Lenovo Y400 battery pipe plate, concentrating solar water heater, vacuum tube-type water heater.

1. Stuffy sun water heater: solar water heater is relatively simple, low cost and with less stringent requirements for a hot water. This water heater can be divided into two types of courage and guts. Courage, is the solar drying boring black plastic or metal box with the water containers and bile. When the solar radiation to the stuffy drying box, the box temperature to water within the water tank is heated. When the temperature reaches a certain request, to let out hot water use. Currently on the market or plastic cylinder Single Tube water heater, are of this type are generally seasonal, but also, mainly for family users.

2. No guts boring drying heaters: water heaters, also known as shallow pool. It works somewhat similar to the drying-type solar cooker boring.

3. Tube plate heater: also known as flat-plate collector, widely used in crop drying, warm water fish farming, greenhouses for growing vegetables, air conditioning and refrigeration, pool heating, baths, and a variety of industrial and agricultural use of water, any temperature below 100 degrees in the field, can use this water heater as a heat source.

Tube heaters by the transparent cover plate (glass or plastic), heat-absorbing body, the composition of the insulation layer and shell. Sunlight into the collector through the transparent cover is endothermic absorbed within, thus transformed into heat energy, and then connected by pipeline with the heat-absorbing plate in the water (water heater) or heat-absorbing plate, or the lower part of the air (air set heat) for heat exchange, to heat water or air to reach the required temperature. Using this water heater, can generally be 40-70 degree water or air.

This basic principle of solar collector water heater, like other water heaters, the water cycle through different temperature density. Hot light, to rise. Heavy cold water only slowly from the bottom up top. The water tank through the collector loop heat, and gradually reach a balance, it is no longer up and down movement of the. However, always keep water in the tank into the collector at the bottom, and hot water also flows in the elitebook 8530p battery upper water tank to provide hot water to use.

4. Concentrating solar water heater: is formed by the condenser water heater collector. From a structural form that concentrating collectors can be divided into a parabolic, cylindrical, Fresnel lens, condenser and other rotating paraboloid and the cone. Usually require tracking concentrating solar collectors, to get high. To improve the hot water temperature, but also to link up several concentrating collectors, multi-level condenser heat. The most common is parabolic concentrator, which is reflected sunlight gathered in a water pipe on, people use the water flow rate control tube to get hot water at different temperatures, the slower flow, higher water temperature.

5. Vacuum tube water heater: It is made using vacuum technology, which can reduce the convection heat loss, increase the temperature. Maximum temperature can reach 200 degrees, can be used throughout the year. It not only can water heating can also heat the air. At present, many countries in the world for air conditioning, winter heating, summer cooling, hot water bath so. In addition, some countries are also used in the winter fish, such as solar dryers.

In recent years, there has developed a new product, its name is double-loop vacuum tube solar water heater, it appears to resolve the problem freezing cold in winter, but also solve the scaling problem arising from hard water. But also solar hot water system can really use a large area throughout the year. The innovative features of the product is hot water users are not direct contact with the collector, but through a coil heat exchanger heating the water tank, heat exchanger tubes in the flow, heat transfer directly ProBook 4310s battery with the collector is antifreeze or softened water (for hard water areas). This will ensure the hot water for cleaning, can solve the cracking and the collector pipe scaling problem, and because the pump forced circulation, improving the thermal efficiency of solar collector is very beneficial. Currently, Daqing City, has been completed throughout the year to use a heat pipe vacuum tube solar hot water system double circulation, clear weather in winter, the system can make water temperature 30-35 degrees, the effect is very obvious.