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太阳热水系统中采用二次换热是最有效的防冻措施

 

太阳热水系统中采用二次换热是最有效的防冻措施。由于集热器侧循环工质采用了防腐防锈的防冻液,这样即可防冻,又可以提高集热器的使用寿命。

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.

独立光伏电站大都建在偏远无电地区,且交通运输极不便,给设备更换带来一定的困难。

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

  而镉镍蓄电池,对过充电、过放电耐受能力强;带换热器的太阳热水系统的能量方程对于带有夹层水箱换热器的自然循环系统,水箱获得的有用能量为:将式(4)(9)代入(11)可得:将式(1)式(3)式(11)和式(12)联立求解,经整理后可得到Tcm:系统作无负荷运行时,贮水箱有能量平衡方程上式就是整个系统的能量平衡方程。

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.hreqi.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.

虽然换热器的使用使平板集热器的效率有所降低,但整个系统的曰效率仍高于真空管热水器(按国家标准GB/T12915-1991《家用太阳热水器热性能试验方法》的测试结果)。与真空管热水器相比,平板型热水器更有利于太阳能与建筑结合一体化。因此,二次换热平板型太阳热水器将有很好的发展前景。

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.