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热回收节能在空调系统中的应用 总被引:9,自引:0,他引:9
郑钢 《能源技术(上海)》2005,26(3):124-126
介绍了空调排风系统冷热量回收、冷凝器冷凝热回收以及冷凝水的冷量回收装置的结构和工作原理,对不同类型的热回收装置进行了比较。 相似文献
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热回收蓄能空调系统的应用研究 总被引:7,自引:0,他引:7
本文重点阐述了热回收技术和蓄能技术在空调系统中的应用,在工作原理、节能循环分析、经济性分析、控制和应用注意事项等多方面进行了初步研究,研究结果表明该节能技术在制冷空调系统中的运用大有前途,可以得到大力的推广。 相似文献
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自立式热增压器是蒸汽喷射器的一种,应用高压蒸汽抽吸用汽设备的排汽或闪蒸汽。经增压后循环使用或做为其他设备的热源。本文通过热增压器在新金县化肥厂的实际应用,叙述热增压器原理、实际运行和实验及热增压器的工作特性。说明其应用价值。 相似文献
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寒冷地区空调用热泵的研究 总被引:27,自引:2,他引:27
本文提出一种适合寒冷地区使用的热泵空调系统,该系统采用带辅助进气口的涡旋压缩机,在低温工况时通过辅助进气口向压缩机工作室喷制冷剂,以此改善热泵内部压缩过程来提高热泵的低温性能。对寒冷地区空调用热泵系统的样机进行了试验研究,结果表明,在-10℃--15℃的低温环境中,该系统仍具有较高的制热能力和供暖温度,能够满足寒冷地区冬季的采暖要求。 相似文献
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为改善临时建筑的热环境居住情况,基于天津市某建筑工地宿舍,针对现有临时建筑存在的不足,研究围护结构的热工性能。通过增加临时建筑围护结构厚度,对比分析增加保温层和封闭空气层的室内温度及热环境改善情况,并探索较优厚度,进而提出节能性建议,以期为新建临时建筑提供节能性参考。 相似文献
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国家经贸委节能信息传播中心 《能源工程》2002,(6):61-62
案例研究目的通过对山东省青岛市宁夏路计委宿舍小区的集中供热系统中应用一体化户用热计量表项目的研究,验证采用热计量表后产生的节能效益和环 相似文献
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蓄能、热回收技术及其在空调工程中的应用 总被引:1,自引:0,他引:1
本文描述了蓄能与热回收技术,分析了这些技术的主要影响因素,阐明了它们在空调系统工程中的重要作用。文章指出工程技术人员在设计空调系统时必须合理地应用这些技术,使空调系统的能耗减小,从而对环境的影响减少到最小,这样才能做到节能与环保并重。 相似文献
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利用太阳能对水加热并通入相变墙进行蓄热,对减少严寒地区单体建筑供热能耗有重要意义。以大庆市某单体建筑为例,结合该地区太阳能分布特点及建筑热负荷大小,对适用于该地区的太阳能-相变墙系统进行集热与储热能力计算,并采用CFD方法研究单一工况下该系统的热工变化规律及不同热水参数、换热管规格对相变墙蓄热特性的影响。结果表明:该相变墙热稳定性良好,但受自然对流影响,底部相变材料熔化较慢;管径DN25、入口流速0.3m/s、供水温度310.15K、回水温度309.15K、管间距107mm可使相变材料在4小时内完成蓄热,平均节能率为31.8%。研究结果可望为降低严寒地区建筑供热能耗提供新思路。 相似文献
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Masaru Ishizuka 《亚洲传热研究》1997,26(8):541-553
In recent years there has been a growing demand for smaller and lighter electronic circuits which have greater complexity, multifunctionality, and reliability. High-density multichip packaging technology has been used in order to meet these requirements. The higher the density scale is, the larger the power dissipation per unit area becomes. Therefore, in the design process it has become very important to carry out a thermal analysis. However, the heat transport model in multichip modules is very complex and its treatment is tedious and time consuming. This paper describes an application of the thermal network method to the transient thermal analysis of multichip modules and proposes a simple model for multichip modules as a preliminary thermal design tool. Based on the results of a transient thermal analysis, the validity of the thermal network method and the simple thermal analysis model are confirmed. © 1998 Scripta Technica, Heat Trans Jpn Res, 26(8): 541–553, 1997 相似文献
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通过工程实例介绍余热(水)冷热联供系统在洗浴行业的应用,计算各种加热系统理论能耗,比较各系统的经济效益,认为该系统在洗浴行业也将会得到更加广泛的应用和发展。 相似文献
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This study deals with the assessment of the thermodynamic performance of cold thermal storage systems using exergy and energy analyses. Several cases are considered, including some storages which are homogeneous, and others which undergo phase changes. In some cases the storages are stratified. A full cycle of charging, storing and discharging is considered for each case. Four cold thermal storage cases are presented in an illustrative example. The results demonstrate that exergy analysis provides more realistic and accurate assessments of the efficiency and performance of cold thermal storage systems than those given by the more conventional energy analysis. In addition, exergy analysis is conceptually more direct since it treats cold as a valuable commodity. It is concluded that the potential usefulness of exergy analysis in addressing and solving cold thermal storage problems is substantial. Copyright © 1999 John Wiley & Sons, Ltd. 相似文献
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The present study examines the effect of flow and geometric parameters on the performance of solar thermal collector provided with impinging air jets. The investigation has been carried out in terms of performance defining criterions which are pertinent to determine the optimal design of impinging jet solar thermal collector. The experimental investigation indicated that the impinging air jets enhances the thermal performance but at the same time the friction power penalty also increases which depress the overall performance of the system. In view of this the preference selection index (PSI) approach based methodology has been applied using various performance criterions in order to determine the optimal design of the parameters which deliver maximum thermal performance with minimal increase in friction factor inside the collector duct. The optimum configuration of the parameters obtained as a result of proposed method is: streamwise pitch ratio of 0.435; spanwise pitch ratio of 0.869; jet diameter ratio of 0.065 and flow Reynolds number of 16,000. 相似文献
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高寒地区附加阳光间式太阳房的节能分析 总被引:3,自引:0,他引:3
以呼和浩特地区为例,通过理论计算附加阳光间式太阳房和二步节能50%后的建筑物在采暖期的采暖能耗,对比分析出附加阳光间式太阳房的显著节能效果。 相似文献