太阳能热水器小论文(英文)

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Split Solar Water Heater
My hometown is Yunnan, where the penetration rate of solar water heater has reached 90% in cities Since adequate sunshine, but most of them are traditional forms of solar water heaters. So I introduce a new form of solar water heater: split solar water heater. Recalling Traditional solar water heater， in order to make the low temperature water hot, the traditional double-decker vacuum tube solar water heater rely on many independent heat pipe to has the working substance evaporated and then condensation, thus putting the heat to the low-temperature water Through this process，however, the disadvantage of such water heater is: a lot of holes will be drilled on the tank, and it’s will result in heat loss. Figure 1 Traditional Double-decker vacuum tubeSolar water heater
1-Vacuum tube 3- Sealing plug 5- Tank
2- Evaporator tube 4- Cold water 6- Hot water
The new Split solar water heater has obvious advantages Compared to Traditional double-decker vacuum tube solar water heater ,it not only Requiring a lower level of accuracy, but also the evaporators be located at different heights can match up to the a same condenser at the same time. In split solar water heater, working substance will evaporate after absorbing luminous energy when the evaporator tubes are exposed in the sun at the beginning, and then liquefaction of working substance will flows back to evaporator tube, after the working substance in the hot gas condition transfer the heat to the low-temperature water, flowing as follows:
Evaporator tube→Joint→ box →Steam pipe→Joint box →Evaporation tube. Figure 2
riser→Condenser→Condensation
New Split solar water heater
1-steam riser 5-cold water
2-hot water 3-condensation pipe 4- Evaporator tube 6- condenser 7- joint box 8-tank
Initially, there is a small part of working substance participate in the thermal cycle, but evaporation and condensation of these working substance not enough to transfer all the heat which is the evaporator tube absorbed, little by little, the working substance of a new cycle will greater on the quality then last cycle, with the working substance gradually less and level rise on joint box, evaporation and condensation will reach the dynamic balance in all working substance take part in. Because the tank will permit to be placed in interior, this will efficaciously reduce heat dissipation, and only 4 holes on the tank, will also reduce heat loss. Just in the meantime，the split soar waster heater can add electric heating system or gas heating system so that users can also enjoy the warm water even in therainy day. Improving program: Not only in view of the solar power panels installed on the housing is not pleasing to tour eyes and affect the interior lighting, but also difficult to

repair. Proposed small-scale community or school set up unified solar power hot water supply station, put absorb solar power panels and water tanks are concentrated in one place, setting a unified water supply center, can make full use of resources and
convenient the life of Community residents.

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