共查询到19条相似文献,搜索用时 234 毫秒
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本文基于混合动力燃气热泵系统,设计了该系统的并联式驱动形式.基于发动机燃气消耗率以及发动机与压缩机的速度匹配,对并联式驱动系统的传动装置进行了设计.对余热回收系统的管道布置方式进行了区分和研究,选择了旁通式的余热回收系统.将并联式驱动系统、余热回收系统以及热泵系统结合构建了并联式混合动力燃气热泵系统.在此基础上,对该热泵系统进行了电机恒定扭矩的充放电试验,研究了在不用运行模式下,整个系统的性能与各个参数的变化规律,包括:热泵性能系数(COP)、热泵制热量、发动机燃气流量、余热回收量.最后,基于对系统的试验性能研究,分析该系统的一次能源效率(PER)的变化规律,并与燃气热泵系统进行比较.结果发现,电机充电扭矩提高系统PER约14%效果明显,而电机扭矩提高系统PER为1.1%左右. 相似文献
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搭建了燃气机热泵机组并进行了测试,就过渡季节发动机转速、冷凝器进水温度与空气湿球温度对燃气热泵制热量影响规律进行了研究,为燃气机热泵运行提供了参考。 相似文献
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分析了压缩机转速变化对燃气机热泵制冷量、制热量及压缩机输入功率的影响。研究了燃气机热泵性能系数随压缩机转速变化的规律,调节压缩机转速可实现燃气机热泵的变负荷运行,尽管性能系数略有下降,但下降幅度较为平缓,且在较大范围内变化很小。 相似文献
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本文阐述了燃气机热泵的工作原理,通过对该设备系统与一般热泵的比较,指出燃气热泵的特点,并对国内外研究和应用发展状况进行了回顾,探讨了燃气机热泵在暖通空调中应用的方法,对其节能效果进行了分析,结果表明采用燃气机热泵具有较高的能源利用系数,指出了燃气机热泵在暖通空调中具有广泛应用的前景。 相似文献
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介绍了燃气机热泵空调室外机的结构。结合工程实例,探讨了燃气机热泵空调系统的设计,介绍了使用燃气机热泵空调系统的体会。分析了燃气机热泵空调系统与常规热泵空调系统、集中供暖系统相比具有的优势。 相似文献
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There is an increasing trend in using heat pumps in air conditioning (heating/cooling) systems of residential and commercial buildings. The required power to drive the compressor of vapor compression heat pump cycles may be provided by either an electrical motor or an internal combustion engine. In this paper thermal modeling and economic analysis of gas engine heat pumps (GEHPs) are presented based on energy and mass balance equations as well as the gas engine operating parameters (such as thermal efficiency, fuel consumption and fuel mass flow rate) and heat pump operating parameters (such as evaporator and condenser capacity and compressor input power). Based on the modeling results and with estimating GEHP fuel consumption, the economic analysis of using gas engine heat pumps (in comparison with the electrical heat pumps) at various climate regions of Iran, for both residential and commercial (office) buildings, and for both cooling and heating modes, was performed. Appropriate cost functions for predicting GEHP capital investment were proposed. Three approaches including equivalent uniform annual cost (EUAC), the annual cost of energy consumption, and payback period were applied in the economic analysis. 相似文献
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The main functions of the heat-pump air conditioning system driven by gas engine (GEHPAC) are to maintain the room temperature and control the humidity of the room. In summertime, the air can be reheated by the waste heat water from the gas engine, while the air can be reheated and humidified by the waste heat water in winter. Reducing or displacing electrical heating requirements can achieve the greatest opportunity for significant energy savings. This paper, therefore, aims to improve the energy performance of the AC system by using the waste heat from the gas engine. The mathematical model for the second heat exchanger, the sprayed room, the mixed air, was used to research the GEHPAC. Explicitly, we investigated the influence of various factors including the outdoor air temperature and humidity in summer and winter. Results from the analysis show that the GEHPAC can save more energy than the electricity engine heat pump. The GEHPAC runs beautifully in part load mode. PERx is higher in winter than in summer. The maximum PERx is over 1.6 in summer, while over 1.9 in winter. The GEHP which can control the room humidity can be used in more areas than the common GEHP. 相似文献
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双源热泵技术在集中热水供应系统中的应用 总被引:1,自引:0,他引:1
介绍了双源热泵的技术特点以及在建筑热水供应系统中的组合利用方式等,通过对比分析太阳能,燃油燃气锅炉,电锅炉等热源的适用性以及经济性,论述了双源热泵的低运行成本,空调热量回收和利用等节能特点,以及适用策略等。 相似文献
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利用工业废水的低温热量结合热泵技术给建筑物供暖,代替传统的燃煤、燃气、燃油锅炉和电锅炉的取暖方式,具有节能、省地、节水、环保等优势,可改变北方地区长期采用燃煤供暖的状况,对节约能源及改善环境将起到积极作用。 相似文献