Based on a well-designed collector/evaporator, a novel direct expansion solar assisted heat pump water heater is introdu......

针对目前燃气热水炉只利用燃料的低热值的情况,根据利用水蒸气冷凝后放出的汽化潜热可进一步提高热效率的原理,开发了一种可充分利......