海水制冷热泵系统的海水换热方案分析

对海水制冷热泵系统的原理与特点进行了简要的概述,给出了三种海水制冷热泵系统的海水换热方案,并对三种方案进行了初步技术经济分析,为海水制冷热泵系统的设计与应用提供参考。     

间接式海水源热泵系统动态运行能耗的模拟分析

由于大气温度同时影响着建筑物空调系统的冷热负荷和海水的温度,而海水温度的变化又会导致海水源热泵系统性能的改变,因此,海水源热泵系统的运行能耗同时受到大气温度和海水温度的影响。文章以青岛市某海水源热泵系统为例,以DeST软件模拟得到的建筑物逐时空调负荷为基础,模拟计算和分析了该系统在海水温度动态变化情况下的运行能耗。     

热泵循环海水淡化系统

对现有的热法海水淡化方法进行了节能评述,并提出一种综合了低温多效蒸馏与压汽蒸馏两种海水淡化方法技术优势的新系统,通过对此系统的设计计算,得出结论：本文提出的利用热泵循环的节能海水淡化系统能耗低,在热法海水淡化系统中最为节能。     

二氧化碳热泵热水器系统运行特性

二氧化碳因其具有良好的环境性能及其在跨临界循环运行下所具有的独特热力学优势,一直是制冷、空调、热泵行业的研究热点。为了研究二氧化碳跨临界循环热泵热水器的系统运行特性,项目组设计并搭建了水源型二氧化碳热泵热水器测试系统,测试了在不同气冷器进、出水温度,不同蒸发器进水温度及不同电子膨胀阀开度下,系统运行时性能系数(COP)、制热量及制冷量的变化值,初步掌握了二氧化碳跨临界循环热泵热水器系统的运行特性。     

水源热泵空调系统运行优化

以采用水源热泵机组的某住宅小区为例,分析其建筑的冷热负荷特性,探讨其变化规律;对水源热泵机组、水泵系统、热源井的运行控制策略提出优化方案,为同类工程的节能运行提供参考。     

热泵干燥系统运行特性的有效能研究

热泵干燥能源消耗少，环境污染小，干燥品质高，适用范围广，是一种性能优良的种子干燥机械。从热力学第一、第二定律两方面分析了热泵干燥系统的节能优势所在，得出采用辅助冷凝器是闭式热泵干燥系统的理想方式；而且热泵干燥系统存在一个最佳的蒸发温度，可使系统除湿率和效率最大。     

变频控制热泵式VRV空调机组冬季运行特性研究

本文在国内第一VRV空调设备整机性能实验台上对变频控制热泵式VRV空调机组冬季运行工况进行了一系列实验研究,得到了室内机制热量、室外机功率随室内外温度的变化,机组在部分负荷时的能效比以及影响能效比的因素,并对霜工况进行了分析。     

海水制冷热泵装置的节能分析与材料优选

海水具有温度相对稳定、能量蕴含量大等特点,本文对近海地区采用海水作为制冷热泵冷热源的节能特性进行了系统的分析,对耐海水腐蚀金属材料的研究情况进行了介绍,对天津地区适宜用作海水换热器的材料进行了优选,为近海地区高效制冷热泵装置的设计与应用提供了参考。     

海水热泵系统的应用及发展前景

介绍了以海水热泵为基础的区域供热/供冷系统在瑞典斯德哥尔摩的应用实例.通过我国和瑞典情况的比较,指出利用海水资源及热泵系统进行区域供冷在我国的发展前途.     

大型热回收型空气源热泵机组冬季运行特性及其试验分析

介绍了热回收型空气源热泵机组的系统原理，分析了大型热回收型空气源热泵机组冬季运行特性，提出了机组相应的运行模式，并对机组在冬季工况下的运行性能进行了试验研究，分析了机组在该运行工况下需要考虑的问题，并提出了相应的解决方法。     

Sorption-compression heat pumps

Elementary and improved sorption-compression heat pumps are defined and recent developments are reviewed. The merits of the most interesting type, i.e. the resorption-compression (RC-) heat pump, are discussed. The performance of an industrial pilot RC-heat pump for production of process vapour is described. Some performance and cost examples for different applications are given.     

Performance of ejector heat pumps

An ejector-compression heat pump can use low-grade thermal energy in the neighbourhood of 93.3°C (200°F) to provide space cooling and heating. This paper applies the existing ejector theory to estimate the performance of an ejector heat pump system at various operating conditions. The study includes parametric, sensitivity and off-design analyses of the heat pump performance. The performance enhancement options and desired ejector geometry are also examined. Refrigerants 11, 113 and 114 are three of the halocarbons most suitable for the ejector heat pump system. The estimated coefficients of performance for a simple ejector heat pump are 0.3 for the cooling mode and 1.3 for the heating mode at a sample operating condition in which the refrigerant (R-11) boiling temperature is 93.3°C (200°F), condensing temperature 43.3°C (110°F) and evaporating temperature 10°C (50°F). A 24 per cent performance improvement is predicted for a heat pump with two-stage ejectors and regenerative heat exchangers. The off-design performance is relatively insensitive to the evaporator temperature variations.     

Metal hydride heat pumps

Heat pumps have been known for a long time, but, until the energy crisis of 1973, there were only a few studies covering them. Since that time, in addition to alternative energy sources, scientists and engineers have started studying heat pumps more earnestly. There are several kinds of heat pump and utilizations of them, but the most common one is the vapour-compression heat pump. In recent years researchers have started to study metal hydride heat pumps. The paper considers the metal hydride bed, its thermodynamics, and its utilization as a heat pump. It is also compared with conventional heat pumps. The results indicate that the metal hydride heat pump has several advantages, and its utilization in the industrial, commercial and residential fields is foreseen.     

化工节能中的热泵精馏工艺流程分析

介绍了几种典型的精馏热泵流程 ,分析了它们的特点、应用条件及节能效果 ,供进行热泵精馏可行性设计时参考。     

Vertical-borehole ground-coupled heat pumps: A review of models and systems

A large number of ground-coupled heat pump (GCHP) systems have been used in residential and commercial buildings throughout the world due to the attractive advantages of high efficiency and environmental friendliness. This paper gives a detailed literature review of the research and developments of the vertical-borehole GCHP technology for applications in air-conditioning. A general introduction on the ground source heat pump system and its development is briefly presented first. Then, the most typical simulation models of the vertical ground heat exchangers currently available are summarized in detail including the heat transfer processes outside and inside the boreholes. The various design/simulation programs for vertical GCHP systems primarily based on the typical simulation models are also reviewed in this paper. Finally, the various hybrid GCHP systems for cooling or heating-dominated buildings are well described. It is found that the GCHP technology can be used both in cold and hot weather areas and the energy saving potential is significant.     

污水源热泵技术及其应用

介绍了污水源热泵的特点。通过对空气源热泵、地源热泵和污水源热泵等不同采暖系统的经济性和环保效果分析显示，污水源热泵系统的初投资为地源热泵的70％左右。综合考虑初投资和运行费用等因素，污水源热泵系统的经济效果和环保效果最为显著。     

Performance and economic feasibility of ground source heat pumps in cold climate

Ground source heat pumps (GSHP) are attractive alternatives to conventional heating and cooling systems owing to their higher energy utilization efficiency. In this paper, the effect of various system parameters on GSHP performance is studied using a computer model. Also, a comparative economic evaluation is carried out to assess the feasibility of using a GSHP in place of conventional heating/cooling systems and an air source heat pump. The results indicate that system parameters can have a significant effect on performance, and that GSHP is economically preferable to conventional systems. © 1997 John Wiley & Sons, Ltd.     

地源热泵在南方城市的应用分析

阐述了地源热泵的优势，并结合实例论证了地源热泵的优点，为该技术的推广应用提供了工程上参考。测试了实际工程的运行状态参数，为今后的设计运行提供参考。