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    太陽熱水系統中采用二次換熱是最有效的防凍措施

     

    太陽熱水系統中采用二次換熱是最有效的防凍措施。由于集熱器側循環工質采用了防腐防銹的防凍液,這樣即可防凍,又可以提高集熱器的使用壽命。

    Two heat transfer in solar hot water system is the most effective anti freezing measure. Because the side circulating working fluid of the heat collector adopts the anti corrosion and anti freezing liquid, the anti freezing and the service life of the heat collector can be improved.

    獨立光伏電站大都建在偏遠無電地區,且交通運輸極不便,給設備更換帶來一定的困難。

    Independent PV power plants are mostly built in remote areas, and transportation is very inconvenient, to bring some difficulties to the equipment replacement.

      而鎘鎳蓄電池,對過充電、過放電耐受能力強;帶換熱器的太陽熱水系統的能量方程對于帶有夾層水箱換熱器的自然循環系統,水箱獲得的有用能量為:將式(4)(9)代入(11)可得:將式(1)式(3)式(11)和式(12)聯立求解,經整理后可得到Tcm:系統作無負荷運行時,貯水箱有能量平衡方程上式就是整個系統的能量平衡方程。

    And nickel cadmium battery, to over charge, over discharge withstand strong; change the energy equation of the solar hot water system of heat exchanger www.yybnkj.com   for is provided with an interlayer water tank for heat exchanger of natural circulation system and water tank to obtain the useful energy is: formula (4) (9) substitution (11): formula (1) - (3) (11) and (12) simultaneous solution, after finishing, can get the TC, M: system running without load, water storage tank with the energy balance equation of energy balance equations of the type is the whole system.

    雖然換熱器的使用使平板集熱器的效率有所降低,但整個系統的曰效率仍高于真空管熱水器(按國家標準GB/T12915-1991《家用太陽熱水器熱性能試驗方法》的測試結果)。與真空管熱水器相比,平板型熱水器更有利于太陽能與建筑結合一體化。因此,二次換熱平板型太陽熱水器將有很好的發展前景。

    Although the change of heat exchanger using the flat set of heat exchanger efficiency decreased, but the efficiency of Yue was still higher than that of the vacuum tube water heater (according to the testing results of the national standard GB/T12915-1991 the household solar water heater for thermal performance test methods "). Compared with the vacuum tube water heater, flat type water heater is more conducive to the integration of solar energy and building integration. Therefore, the two heat exchange plate type solar water heater will have a good development prospects.

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