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地源热泵供热系统在运行控制方案上的优化,是建筑节能降耗的重要途径。以沈阳市ST办公楼地源热泵系统为研究对象,实地调研获取能源系统运行参数,归纳地源热泵的运行特性,锁定实际建筑中地源热泵系统供热现存问题,利用遗传算法寻求地源热泵系统最优运行控制参数。利用TRNSYS模拟能源系统运行,通过比较系统原有的改变机组负载率的控制方案与优化后最优运行控制参数方案的系统耗电量和性能系数,预测最佳控制方案下地源热泵系统的优化效果。结果表明:在最优运行控制方案下,地源热泵系统性能显著提升,系统耗电量降低14.5%,系统性能系数(COP)提升23.8%,热泵机组耗电量降低15.1%,地源热泵系统运行更加高效节能。 相似文献
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对某工业园的水蓄能式地源热泵系统进行分析,并与水冷机组+燃气锅炉系统在初投资、运行费用、环境效益方面进行对比.结果表明,水蓄能地源热泵系统在初投资方面比水冷机组+燃气锅炉系统多了700万元,但每年的运行费用上均减少31.91元/m2,多投资的费用约5.5年即可回收;在运行周期内,水蓄能式地源热泵空调方案节约标准煤为约2... 相似文献
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某工程土壤源热泵间歇运行的测试研究 总被引:2,自引:0,他引:2
土壤源热泵系统作为一项节能、环保的空调系统方式,目前已得到广泛应用.然而土壤源热泵系统的埋地换热器受土壤物性影响较大,连续运行时热泵机组的冷凝温度或蒸发温度会受土壤温度的影响发生波动,从而导致热泵机组和系统的能效比发生变化.笔者以实际工程为测试对象,重点分析了土壤源热泵系统间歇运行对机组和系统能效比EER的影响,得出在该工程土壤源热泵系统间歇运行测试条件下,机组EER基本稳定在4.5之上,系统EER基本维持在2.5左右,达到了较高的运行效率. 相似文献
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自主设计了地源热泵热水/空调冷热联供系统和单纯的地源热泵供热水系统,并将其应用于高层建筑中.运用单因素方法,研究循环介质流量等对热泵系统运行特性的影响,确定最佳流量,并通过测试计算系统的能耗.结果表明,在地源热泵热水/空调冷热联供系统中,采用地源制热水时的机组能效比和系统能效比分别为4.7和4.2,冷热联供时的机组综合能效比和系统综合能效比分别为8.63和6.39;系统全年制热水耗电量为6.35 kW·h/m3,与电锅炉加热方式和太阳能+电辅助加热方式相比,可分别节省82.2%和46.7%的电量.在单纯的地源热泵供热水系统中,机组能效比和系统能效比分别为4.8和4.3,全年制热水总耗电量为11.13 kW·h/m3,与电锅炉加热方式和太阳能+电辅助加热方式相比,可分别节省74.69%和24%的电量.由此说明,地源热泵集中供热水系统应用于高层建筑的节能效果显著. 相似文献
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我国能源储量日渐紧张,提高可再生能源消费占比、推进绿色建筑发展、提高可再生能源利用率等问题被日渐重视起来。本文以探究绿色建筑土壤源-空气源双源热泵运行效果为目的,对该建筑热泵系统进行连续2 a的监测;从热泵实际运行特性和运行性能两方面对比分析了2016年土壤源-空气源双源热泵机组运行和2017年土壤源热泵机组单独运行时机组的供回水温度、供热量、COP及耗电量等信息。结果表明:经采暖度日数修正后2016年机组平均COP为2. 79,2017年机组平均COP为2. 00;土壤源-空气源双源热泵实际运行效果优于土壤源单源热泵。 相似文献
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吴艺博 《建筑热能通风空调》2020,39(3):46-48,105
本文以佛山市某化工厂应用污水源热泵为例,对常规冷水机组+燃气锅炉与污水源热泵机组两种系统方案进行了经济性及节能减排性比较分析。结果表明,与常规冷水机组+燃气锅炉系统相比,采用污水源热泵系统后,初投资成本增加了1.8万元,但每年的运行费用节省了25.4万元。一次能源利用率提高16%,每年可节省天然气约38658 m^3,节能及环保效应显著。 相似文献
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A ground source heat pump (GSHP) system was designed and constructed in Minhang archives of Shanghai. As a demonstration project, it is the first archives to use a GSHP system in China. The system consists of two heat pumps with the rated cooling capacity of 500 kW for each and 280 boreholes with 80 m in depth. In the cooling mode, the heat extraction from the condenser of the heat pump was divided: part of it was rejected to the soil while the rest was used to reheat the air in air handling units. The GSHP system has continuously run for nearly two years. It was shown that the indoor thermal environment met the “Archives Design Code” issued by China national archives. Compared with an air source heat pump system which is widely used in archives buildings, the operating cost of the GSHP system is reduced by 55.8% and the payback time is about two years. Owing to its great potential in energy conservation, such kind of GSHP system is testified to be applicable to the air-conditioning systems of the archives buildings. Besides, the applications of GSHP systems corresponding to different climatic zones of China were analyzed. 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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热泵辅助太阳能中央热水系统压缩机选择研究 总被引:1,自引:0,他引:1
采用热泵来完全或部分替代传统的电加热器,可使太阳能中央热水系统全天候工作,同时可降低运行费用。但压缩机类型不同不仅会影响系统的可靠运行范围,也造成其运行费用有所差异。本文选用两种方案进行分析研究,方案1使用MT60活塞压缩机,而方案2采用ZR61涡旋压缩机,在方案2中保留电加热器,建立了合适的数学模型,根据2005年西安地区气象数据、压缩机安全运行和性能曲线进行了模拟计算。结果表明,ZR61系统具有更好的节能效果,但是其结构略显复杂,同时需要更大的配电能力。 相似文献
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