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空气源热泵制冷热回收机组的技术可行性 总被引:1,自引:0,他引:1
通过对一台普通的空气源热泵进行热回收改造,利用回收的热量加热生活热水。改造后的机组在实验台上进行了全年运行工况测试,通过对机组改造前后运行工况的分析对比,提出了带热回收装置的热泵是一种节能的空调热水机组,并对机组在冬季的运行过程中可能出现的问题作了说明。 相似文献
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利用Dest软件计算某恒温游泳池全年动态空调负荷,并模拟三集一体热泵全年空气处理过程及运行能耗,通过与传统方案进行比较,阐明三集一体热泵在室内恒温游泳池应用的节能性、经济性。 相似文献
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In indoor swimming-pool facilities, the energy demand is large due to ventilation losses with the exhaust air. Since water is evaporated from the pool surface, the exhaust air has a high water content and specific enthalpy. Because of the low temperature, the heat from the evaporation is difficult to recover. In this paper, the energy demand for the conventional ventilation technique in indoor swimming pools is compared to two different heat-recovery techniques, the mechanical heat pump and the open absorption system. The mechanical heat-pump is the most widely used technique in Sweden today. The open absorption system is a new technique in this application. Calculations have been carried out on an hourly basis for the different techniques. Measurements from an absorption system pilot-plant installed in an indoor swimming pool in the northern part of Sweden have been used in the calculations. The results show that with the mechanical heat pump, the electrical input increases by 63 MWh/year and with the open absorption system 57 MWh/year. However, a mechanical heat-pump and an open absorption system decrease, the annual energy demand from 611 to 528 and 484 MWh respectively, which correspond to decreases of approximately 14 and 20% respectively. The electricity input will increase when using heat-recovery techniques. Changing the climate in the facility has also been investigated. An increased temperature decreases the energy demand when using the conventional ventilation technique. However, when either the mechanical heat-pump or the open absorption system is used, the energy demand is increased when the temperature is increased. Therefore increasing the temperature in the facility when using the conventional technique should be considered the first measure to reduce the energy demand. 相似文献
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相变贮热在热泵干燥机组中的应用研究 总被引:7,自引:1,他引:6
热泵干燥既能节约能量又可提高产品的质量,当干燥温度满足干燥要求后,热泵干燥机组往往通过排放掉一部分热量来维持干燥温度的稳定,这样降低了热泵干燥的能源利用效率,利用相变材料相变热效应,回收这部分能量,而且又在机组需要热量时将贮存的能量释放给干燥空气,实验结果证明了相变材料在热泵干燥机组中的应用具有明显的节能潜力。 相似文献
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传统直膨式太阳能辅助热泵系统在低温环境适应性欠佳,影响其在寒冷地区使用,通过采用补气增焓技术可以有效提高其低温条件下的供热能力。以所提出的采用PVT集热/蒸发器的补气增焓热泵系统为研究对象,计算分析环境条件、太阳辐射强度、注入蒸汽质量流量对该热泵系统性能的影响。研究结果表明: 当环境温度为-10℃,太阳照强度为500 W/m2时,性能系数(COP)可达4.3,比使用补气增焓(VI)循环的空气源热泵(ASHP)系统高63.6%。以当量热价(LCOH)作为指标与其他3种供热系统进行比较,所提出的系统经济性也具有一定的优势,可为补气增焓热泵系统在寒冷气候地区的应用提供新思路。 相似文献
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太阳辐射对热泵系统的室外空气换热器的热工性能有显著影响。提出了通过修正换热器传热系数以考虑太阳辐射作用的计算方法,设计出了热泵系统的实验装置并由实测数据进行了计算,得出了有与无太阳辐射时的传热系数之间的关系式。该方法不但可以提高热泵系统的热工性能模拟和能耗分析的准确性,而且对热泵系统及其室外空气换热器的设计与安装具有指导意义。 相似文献
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针对热源塔换热能力及热源塔联立热泵主机制热情况分别进行试验研究,并与风冷热泵的制热变化性能进行比较分析。结果表明,控制热源塔进口气液温差恒定的情况下,塔从空气中吸收的热量随环境温度的降低而增加,溶液中溶质的挥发对热源塔吸热量有重要影响;热源塔进口气液温差随环境自然变化的情况下,环境温度与蒸发温度的温差随环境温度的降低而减小,热源塔从空气中吸收的热量也随之减少。在低温工况下,虽然空气含湿量较少,但热源塔热泵系统相比于其他空气作为热源的热泵系统,在潜热换热方面有较大优势。 相似文献