水源热泵机组在制取和供应生活热水方面的节能应用

以一项节能改造工程的管理、设计、改造及测评为例,从技术应用的可行性及经济性数据分析出发,总结出在医院、宾馆、高校等一些公共建筑推广这种废热回收技术的应用价值.     

水源热泵系统冷凝热利用的节能分析

建立了水源热泵冷水机组主要部件的？方程,结合实例对冷水机组的制冷和冷凝热回收两种运行工况进行了？损失和？效率的计算,并对比分析计算结果,可知机组的？效率由38.1%提升至43.5%,从能源质的角度表明了水源热泵系统中运用冷凝热利用技术的节能性。另外,结合生活热水制备中的工程实例,计算冷凝热回收与燃气锅炉及电加热等传统热水制备方式的运行能耗,分析冷凝热回收在生产生活热水中的节能效益,得出热回收系统相比于另外两者的一次节能率均达90%以上,节能效果明显。     

某石油产业园水源热泵及生活热水系统设计

以某石油产业园的空调及生活热水系统设计为研究对象,对其采用水源热泵的技术可行性和经济性进行分析,以期为相似工程的设计提供借鉴。     

热泵技术在浴室废热回收上的应用研究

本文从性能系数、能源利用系数、运行经济性等方面对热泵浴室废热回收系统进行了分析,指出该系统有较佳的运行经济性和环保节能效果,具有广阔的市场前景.     

全热回收型湖水源热泵在某工程的应用

依据工程的空调冷热负荷、生活热水耗量,介绍了冷热源系统、空调水系统和湖水取水系统的设计,重点阐明了湖水源热泵技术和全热回收技术综合利用系统的原理和运行模式.并对系统进行了经济性和节能性分析,结果表明:全热回收型湖水源热泵空调系统虽然在初投资方面并无优势,但在年运行费方面优势明显,比单冷水冷式螺杆机组+燃气热水锅炉系统节约27％,简单投资回收期为0.34年;比空气源热泵机组+燃气热水锅炉系统节约40％,简单投资回收期为0.54年;在节能性方面,相对于后两种方案分别节能4.3％和31.1％.     

暖通空调技术的相关问题研究

文章介绍了暖通空调技术的发展概况，对暖通设计规范及标准方面存在的问题及水源热泵技术的应用等几个方面进行了探讨。目前的暖通空调设计人员在贯彻执行现有的规范、标准方面，还存在着不少问题，文章从供暖热负荷计算、室内空气计算参数、高层建筑排烟系统排烟口选型等方面进行分析，并提出一些参考意见。     

桂林某酒店河水源热泵及生活热水系统设计

介绍工程概况、当地水文条件、冷热负荷及生活热水用量、冷热源系统、取排水系统、水处理系统,并对酒店采用水源热泵系统的经济性进行分析,重点介绍取排水系统、水处理技术措施。     

水轮泵在地表水水源热泵取水系统的应用

为优化地表水水源热泵开式取水系统,解决机房与水体表面高差偏大而导致取水能耗偏大的问题.提出利用水轮泵回收排水的重力势能为水源热泵取水系统的水循环提供动力,介绍了能量回收型水源热泵取水系统形式和水轮泵节能原理.并以某工程为例,计算得出该能量回收型取水系统的夏季节能率为37.5％,冬季为60.1％.     

Measurement of transient heat flux using heat gauges

This paper describes the theoretical basis, the design, and the method of calibrating heat gauges for measuring variable heat fluxes.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 29, No. 5, pp. 814–820, November, 1975.     

Compact heat exchangers, enhancement and heat pumps

In order to achieve widespread use of heat pumps across the full spectrum of potential applications, it is critical that the first cost of the units is acceptable. There are many factors influencing this cost, including the number of units manufactured, the ease of installation, the complexity of the control requirements, and the cost of the working fluid(s). A common feature of all heat pump cycles is the presence of at least one heat exchanger, indeed some heat-driven cycles are composed almost entirely of heat exchangers, each having a different but critical role to play. There are several important aspects of heat exchangers that can help to reduce first cost of these components and the system, (in addition to the possible positive impact on coefficient of performance). Two of these are discussed here — compact heat exchangers (CHEs) and heat transfer enhancement. The latter may be directly associated with CHEs but can be equally beneficial in reducing approach temperature differences in 'conventional' shell and tube heat exchangers. Both are essential features of many intensified processes, which the author argues need compatible heat pumps if the market for the latter is to flourish. In this paper, the most recent types of CHE are described, with emphasis on the benefits they can bring to heat pump first cost and performance. Heat transfer enhancement in heat pumps is also reviewed.     

Specialist heat transfer service aids heat exchanger designers

The Heat Transfer and Fluid Flow Service offered at UK Atomic Energy Authority, Harwell is described with particular emphasis on its applications to the cryogenics industry.     

氦-3的汽化热和熔解热

基于Clausius-Clapeyron方程、维里方程和最新开发的氦-3相平衡曲线方程计算了氦-3在平衡曲线上的两个重要性质:汽化热(0 K～3.315 7 K)和熔解热(0.001 K～35 K).计算结果覆盖的温度范围广,精度也满足工程应用的需求.     

土壤源热泵水平螺旋地埋管换热器换热性能研究

通过建立水平螺旋地埋管与回填材料以及土壤的三维换热数学模型,对水平螺旋地埋管换热器的换热性能进行研究。对影响水平螺旋地埋管与土壤之间换热性能的因素进行分析,包括水的流速、进口水温、螺旋环径、相邻环中心间距、回填材料等。研究结果表明这些影响因素对换热性能（单位管长换热量和单位土壤长度换热量）有着不同程度的影响。     

Nonstationary regime of heat exchangers with internal heat sources

Analytic relations are obtained for determining the stability of thermoelectric devices and heat exchangers with heat sources whose strength is a linear function of temperature.     

Prediction of heat transfer correlations for compact heat exchangers

Zusammenfassung In der vorliegenden Arbeit werden zwei numerische Verfahren zur Bestimmung von empirischen Gleichungen in Kreuzstrom-Wärmeübertragern mit vergrößerter Oberfläche verglichen. Bei der ersten Methode wird nur eine Gleichung für den Wärmeübergangskoeffizienten auf der Gasseite gesucht, während der Wärmeübergangskoeffizient an der inneren Oberfläche des Rohres bekannt ist und nach den Gleichungen von Dittus-Boelter oder Gnielinski berechnet wird. Bei der zweiten Methode werden gleichzeitig Gleichungen für den Wärmeübergang sowohl auf der Gasseite als auch bei der Rohrströmung ermittelt.

---

The following paper compares two numerical methods for determining correlations for heat transfer coefficients in cross-flow compact heat exchangers. In the first method, only the correlation for the air-side heat transfer coefficient is determined. The heat transfer coefficient on the tube-side is calculated using the Gnielinski or Dittus-Boelter correlations. In the second method, the heat transfer correlations both on the tube and air-side are determined simultaneously in order to predict the air-side heat transfer more accurately.

     

Dynamic properties of heat receivers with moving heat carrier

Frequency characteristics of heat receivers with a moving heat carrier are found.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 35, No. 1, pp. 41–47, July, 1978.     

板翅式换热器的传热计算

介绍了板翅式换热器的结构形式,通过传热方程式推导出了翅片效率、表面效率以及流动阻力的计算公式,为板翅式换热器的计算提供依据。