太阳能热泵系统蓄热优化

Optimization of heat storage of solar heat pump system

太阳能-热泵系统具有清洁高效等优点,与蓄热技术的耦合使用能够提高整个系统的效率。将太阳能-热泵技术中原来在环境中的蓄热水箱换成埋地型蓄热水箱,以及将太阳能的入口水源变成埋地蓄冷水箱进水,对太阳能-热泵系统蓄热装置进行优化。通过计算可知,优化后的系统的节能主要体现在以下几个方面:(1)埋地后的蓄热水箱比暴露在空气中的蓄热水箱热损失更小;(2)在夏季,蓄冷水箱中水比环境中的水温度更低,其冷量可以作为热泵循环中的主要制冷源,冷却从室内空气中所吸收的热量被蒸发的制冷剂,节约一部分能量;(3)在冬季,蓄冷水箱中水比环境中的水温度更高,其热量可以作为热泵循环中的热源,加热从室内空气放出热量被冷凝的制冷剂,节约一部分能量;(4)冬季中蓄冷水箱中的水会比环境中的水温度更高,在太阳能稀缺的冬季减少集热器热负荷。

The solar-heat pump system has the advantages of cleanliness and high efficiency. The coupled use of heat storage technology greatly improves the efficiency of the entire system. In this paper, the original storage tank in the environment in the solar-heat pump technology is replaced with an underground storage tank, and the solar water inlet is turned into an underground cold storage tank to enter the water to store the solar-heat pump system. The thermal device is optimized. It can be seen from the calculation that the energy saving of the optimized system is mainly reflected in the following aspects:(1) The buried heat storage tank has less heat loss than the heat storage tank exposed to the air;(2)In summer, the water in the cold storage tank is cooler than the water in the environment, and its cooling capacity can be used as the main cooling source in the heat pump cycle, cooling the refrigerant that has been evaporated from the heat absorbed by the indoor air, saving part of the energy;(3)In winter, the water in the cold storage tank is higher than the water in the environment. Its heat can be used as a heat source in the heat pump cycle to heat the refrigerant that is condensed by the heat released from the indoor air, saving part of the energy;(4) In winter, water in the cold storage tank will be warmer than the water in the environment, reducing the heat load of the collector in winter when solar energy is scarce.