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As a renewable energy utilization system, the electric-driven seawater source heat pump district heating system is gaining popularity in some coastal areas. However, under what conditions can the system achieve its energy-saving effect and how to evaluate its energy-saving potential are not clear in practice. In this paper, an expression of the critical COP value of the heat pump unit for energy-saving (COPh,c) is derived through the comparison of the system and the conventional boiler house district heating system in the energy consumption respect. On the other hand, the actual COP values of the heat pump unit (COPh,a) are calculated by an experimental data regression model on the basis of the manufacturer's dataset. The comparison of the values of COPh,c and COPh,a makes the energy-saving judgment of an electric-driven seawater source heat pump district heating system and its energy-saving potential, if it has, readily available. It was found that both the heating district radius and the natural conditions of the seawater are the most important factors that determine the energy efficiency of the system. And through comparison, it was also found that the type of the fuel of the boiler has significant impact on the crucial index value of COPh,c. 相似文献
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A district heating and cooling system (DHC) is expected to be a promising energy-saving measure for high-density business areas in Japan. However, it has not been verified what advantages of the DHC are important for energy conservation. The clarification of this issue is supposed to contribute to improving the energy efficiency of the DHC. 相似文献
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针对暖通空调节能问题进行了研究,结合实际案例介绍了地源热泵在工程项目中的应用,通过与以城市供热为热源的室内散热器取暖方案进行对比分析,得出地源热泵系统能够有效解决空调系统节能问题,值得推广。 相似文献
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对太阳能热水系统和地源热泵系统在工程实际中的应用情况进行了比较分析,分别就其工作原理、优缺点等作了论述,以期更有针对性的推广和应用这两种可再生能源系统。 相似文献
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从基本原理及技术方案、经济分析等方面阐述了水源热泵系统在住宅供热空调中的应用,提出了中国水源热泵推广应用中存在的问题,对我国供热、环保和节能方面都有促进作用。 相似文献
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太阳能-土壤源热泵系统联合供暖运行模式的探讨 总被引:13,自引:3,他引:13
针对青岛地区的气候条件,对太阳能一土壤源热泵系统(SESHPS)有、无蓄热水箱时各联合供暖运行模式进行了数值模拟。结果表明,与土壤源热泵相比,联合供暖运行模式具有明显的节能效果,有、无蓄热水箱时的节能率分别为14.5%和10.4%;有蓄热水箱时的联合供暖运行模式二(集热器与埋管串联运行,载热流体先经过埋管后进入集热器)的效果最佳。对SESHPS联合供暖运行模式的优化结果表明,可按能量比例63%与37%或尺寸比例13.8m/m^2来设计埋管长度与集热器面积。 相似文献
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介绍了地源热泵中央空调系统的工作原理,将地源热泵中央空调系统与VRV系统中央空调系统进行对比,分析其在苏州地区运营的经济性和效果的舒适性,指出该空调系统环保、节能,适于在苏州地区推广应用。 相似文献
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This paper proposed a new solar assisted air source heat pump system with flexible operational modes to improve the performance of the heating system. A mathematical model was established on the solar assisted air source heat pump system for building heating with a heating capacity of 10 kW, and an air source heat pump unit was developed to validate the model. The effect of the solar collector area on the performance of the system running in Nanjing was studied. The results showed that the COP of the heat pump unit was enhanced with the increase of the solar radiation density during the typical sunny day in the heating season. In addition, the COP also increased in proportion to the solar collector area. Compared with the case when the solar collector area was 0 m2, the COP increase of the heat pump and the energy-saving rate were 11.22% and 24% respectively when the solar collector area was 40 m2. Meanwhile, the solar equivalent generation power efficiency could reach 11.8%. 相似文献
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青岛国际帆船中心媒体中心海水源热泵综合调试 总被引:1,自引:3,他引:1
海水源热泵是近海城市调整能源利用结构,发展利用可再生能源策略的重点推广项目之一.本工程实例是青岛市第一个真正意义上的海水源热泵系统,工程中采用频繁冲洗的方法解决热泵机组对水质要求较高,调试、运行过程中频繁停机的问题以及采用黄夹克保温的方法解决乙二醇溶液热传导系数较高,热量损失的问题.实践表明:系统调试效果达到了设计要求,并且在青岛国际帆船赛期间运行良好. 相似文献
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介绍了地源热泵技术的概念及工作原理,对地下水热泵系统、地表水热系统等三种地源热泵空调的应用方式作了阐述,经与传统的中央空调作比较,提出了国内外地源热泵的发展前景。 相似文献
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对浅层地下水源热泵系统中易忽视的空调循环水泵并联、空调井外网保温、空调井、水源热泵+地板辐射采暖系统等相关问题进行了探讨,并对可能解决的方案进行了讨论,对浅层地下水源热泵系统的设计与施工有一定指导意义。 相似文献
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利用经济分析方法建立了海水源热泵系统的经济分析模型,并对海水源热泵系统流程的成本进行计算,结果表明热泵机房的流成本最高,因此可以通过提高热泵效率等途径来减小流成本。建议以流成本最小作为约束函数,并将经济分析法用于海水源热泵系统的优化设计中。 相似文献