Solar water heater –the road of hot water use for life in China

Speaking of the well-off level, the people often think about average per person income, per-capita housing area, average per person education level and so on, but people often neglect another important target: average per person life use hot water consumption which can materialize the lives’ quality of the people.
At present, when the construction developed the housings in design time, they often considers about cold water, the power source, the gas source and the heating facility(north), neglects the life use hot water. From the point of the development, the life use hot water supply should not consider by the owner, but should carry through with the architectural design at the same time.
Speaking of the present situation, there are 3 ways to solute the common people’s life use hot water. They are electric boiler, fuel gas water heater, solar water heater. At present, in developed countries, home-use hot water energy consumption occupies 20%-30%on the total energy consumption. China is a country with enormous energy consumption, the average per person energy possessive amount is extremely low, .the 21st century facing dual topic with the economical sustainable development and the energy conservation environmental protection. Solves the whole or the partial the use of hot water by renewable clean energy has the momentous significance of the environment protection. Extend the solar water heater is not inessential, but is the only effective way. Analyzes as follows:
There are 1.29billion population 350 million families at present in China, compute by the low standard, each household supply 60℃ hot water 100literes every day. Form 15℃to 60℃, altogether needs 4. 5X 106 cal quantity of heat. Key to the situation:
1. electric boiler
Each house supplies 60℃ hot water 100 litres every day ,the nation demand 664.3billion kwh electricity total a year, equals the nation’s total electricity quantity 52.7% in 1999. According to the present average electrovalence computation, using for the hot water supply by electrical cost 400 billion yuan, each household 1140yuan/year. The expense is enormous for common people to undertake it. The electricity is the clean energy, but the power factor, the thermoelectric power station, can cause the serious pollution to the environment.
Conclusion: uses electricity produces the life use hot water, need enormous investment. It need increase 20million kw capacity every year to solute 25%household life use hot water, equals 10 times above the Three Gorges of the Yangtze River project.
2. fuel gas water heater
It produces waste gas CO, CO2 in use will polluted the environment. The straight platoon type fuel gas water heater, have the certain risk when there has not good situation in the room. It consume t 30m3 gas every month when the household use 60℃ hot water 100litre. Then it will consume 126 m3 gas every year., cost 250billion Yuan.
Conclusion: the investment is enormous. Using cost is high, the resources is in sufficient. It is impossible to realize in the county city and countryside.
3. solar water heater.
The sun’s life divides into five stage, at present is being at the 2nd stage. This stage estimate still has 5about billion years, it may be said inexhaustible. Our country is abundant of solar energy particular in northwest and west. It need not mine, transportation, no operation cost, and no pollution, no noise, have no waste gas. It need not the government to invest, only need make the policy. Our country’s solar energy developed rapid, has the certain foundation, the solar photoelectric technology is in the leading level in the international. We owe the independent intellectual property right, has obtained the good economy and the social efficiency.
Conclusion: the market of the solar photoelectric is popularize. It can use not only in home-use hot water, but also use in the industry hot water, the heating, the air condition, drying, agricultural planter, aquiculture, the seawater desalination. The foreground of solar energy is sunshine.

·The “golden sun” authentication comprehensively spread
·Solar water heater –the road of hot water use for life in China