Instantaneous efficiency and daily average efficiency of evacuated tubular solar heater waters are contrasted with theoretical values by model of calculation and experimental data.
Based on common instantaneous gas water heater, the condensing gas water heater is developed, and the experimental study on its thermodynamic performance is made.
在普通燃气快速式热水器的基础上，研究开发了冷凝式燃气热水器，对其热工性能进行试验研究。
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A novel instantaneous water heater was developed by means of integrating a thermoelectric(TE) heat-pump with a separating thermo-siphon.