吸收式热泵在热电厂乏汽余热回收领域的应用

介绍了我国北方热电厂供热现状、吸收式热泵技术情况以及吸收式热泵在热电厂乏汽余热回收领域应用中应注意的问题,吸收式热泵能够在热电厂有效回收乏汽余热并可应用于城市集中供热,即会在节能减排方面发挥重要作用又会有效解决目前热电厂供热不足问题。     

利用吸收式热泵回收工业废热的探讨

吸收式热泵是一种利用热驱动的节能设备,在节约和充分利用能源方面具有显著的作用,具有很高的可推广性。阐述了吸收热泵的工作原理,对其技术情况作了分析,并对其节能和环保方面的应用作了介绍。     

水—溴化锂吸收式制冷和热泵系统分析

研究了加入硝酸锂对溴化锂制冷和热泵系统性能的影响。结果表明，不管系统中有无回热器，在相同工作温度下，加入硝酸锂对系统的性能均会产生不利影响。     

吸收式热泵回收电厂余热预热凝结水的可行性研究

针对电厂的循环冷却水携带有大量的低温热能,结合热泵回收电厂循环水废热的技术,提出一种利用锅炉排污和汽轮机抽汽驱动吸收式热泵、回收电厂循环水废热来预热凝汽器凝结水的电厂循环经济思路.经过可行性与经济性分析,表明此思路可行,具有环保、节能的双重功效.     

荏原世界单体最大吸收式热泵应用京能热电

烟台荏原生产的8台超大型溴化锂吸收式热泵机组已于日前陆续出厂,供京能热电使用。此次供货的热泵机组单机制热能力达到20MW,是迄今为止世界单体最大的吸收式热泵机组。采用吸收式热泵技术可对热电厂循环水余热得到利用,总供热能力达到160MW,在不增加锅炉和供热机组的情况增加供热面积200万m^2,有效解决了电厂供热能力不足的问题。     

高效吸收式热泵GAX机组的研究进展

介绍了高效吸收式热泵ＧＡＸ回热循环机组中应用的工质及冷凝器、吸收器和吸收－发生器等部件的研究状况，提出了今后的研究方向。     

水－溴化锂吸收式制冷和热泵系统分析

研究了加入硝酸锂对溴化锂制冷和热泵系统性能的影响。结果表明，不管系统中有无回热器，在相同工作温度下，加入硝酸锂对系统的性能均会产生不利影响。     

温度参数对升温型溴化锂吸收式热泵性能系数影响程度模拟分析

分析了温度参数对升温型溴化锂吸收式热泵性能系数的影响,通过对升温型溴化锂吸收式热泵建立数学模型,得到在相同工况条件下,发生温度的变化对系统性能系数的影响程度最大,但小于吸收温度和冷凝温度对系统性能系数影响程度之和.而随着发生温度的升高,它自身对系统性能系数的影响程度越来越弱.     

溴化锂吸收式制冷技术的应用

石油化工企业的蒸馏和催化等炼油装置含有大量低品位热量,本文介绍了回收余热用于空调制冷的溴化锂吸收式制冷技术的工艺特点、运行特性和经济效益。该技术具有节能和环保双重效益。     

Development of hybrid loop heat pipe using pump assistance for cooling application on high heat flux device

Loop heat pipe (LHP) is an effective two-phase heat transfer device that utilizes evaporation and condensation of a working fluid. LHP is widely used in a passive cooling system, highly reliable and a very high thermal conductive device. However, extreme power density can cause dry-out in the evaporator section of LHP and might hinder the performance of the cooling system. The purpose of this research is to design and manufacture a new prototype of LHP by modifying the conventional LHP. The modification was performed by adding a diaphragm pump, called hybrid loop heat pipe (HLHP). The experimental results show that the installation of pumps in the modified LHP was able to prevent the occurrence of a dry out and reduce the operating temperature. Under a constant conductance mode, the pump was activated for 20 minutes and succeded in forcing the system to a new stable condition with a significant temperature drop. These results indicate that HLHP is very promising as a two-phase cooling system that can be proposed for devices that produce high heat flux.

     

孔的高效加工研究及应用

介绍了孔的高效加工刀具，钻、扩孔的工艺技术和切削加工参数；讨论了使用中注意事项和用数学回归分析法建立刀具耐用度经验公式。     

吸收式热泵精馏过程的机理模型和编程设计

精馏塔是流程工业中能源消耗巨大的分离设备,热泵精馏就是在这一背景下提出的用于提高精馏塔能源利用率的一种手段.文章的目的是设计一套吸收式热泵回收精馏塔顶多余的热量,用来加热塔釜的物料,达到节省蒸汽消耗的目的.文中系统地研究了吸收式热泵各换热单元内的热、质传递机理和热动力循环过程,建立了过程模型,利用模型进行了优化设计计算.求出最佳设计参数、操作参数.数值模拟显示该吸收式热泵的能量利用率高,温度提升幅度大,有相当的应用价值和社会效益.     

Performance evaluation of a water-to-water heat pump with a floor panel heating system

The performance of heat pump is severely degraded as the temperature of the heat source is decreased. For air source heat pumps, this results in a serious mismatch of heat pump output and space heating demand. Although the outdoor temperature is below 0°C, the use of a water-to-water heat pump with a floor panel heating system can operate for extended periods of time without frost-defrost cycling and therefore at a high seasonal efficiency. This paper focuses on the performance of a water-to-water heat pump that uses well water as a heat source and a floor panel heating system as a sink.     

河南省郑东新区地源热泵系统应用研究

浅层地热能是一种清洁、可再生的新能源,其利用对地质条件有一定的要求.本文在分析郑东新区水文地质条件、地温场特征、热物理性参数等基础上,结合地下水地源热泵系统和垂直地埋管地源热泵系统的特点,对两种地源热泵系统在郑东新区的应用进行了适宜性分区,并封该地区在应用地源热泵系统中存在的问题提出了建议.     

Three-dimensional fin-tube expansion process to achieve high heat transfer efficiency in heat exchangers

A novel manufacturing process for expanding the tubes of fin-tube type heat exchangers using a three-dimensional (3D) spiral expanding ball fabricated via metal additive manufacturing was proposed for the manufacture of highly efficient heat exchangers. To improve the heat transfer efficiency of fin-tube type heat exchangers, fine grooves are generally formed inside a tube to increase the heat transfer area. However, the height of a groove is commonly reduced when a tube is expanded for tightening with fins. To address this issue, a 3D expanding ball with spiral grooves was first developed and used in the expansion process. In conventional tube expansion, the height reduction of grooves is approximately 10.3 %. However, we demonstrated that it was dramatically improved, reaching approximately 1.7 %, when the proposed process with a 3D expanding ball was applied. We believe that this approach can be used in practical industries to manufacture highly efficient fin-tube heat exchangers.

     

水泵装置高效节能运行探索

阐述影响水泵装置效率的因素,通过对运行实践的总结,提出提高水泵装置效率与节能降耗的途径和措施.     

海水柱塞泵的低泄漏高效率研究

以海水作为介质时,柱塞泵通常存在泄漏大、容积效率低等缺点.为了研究海水柱塞泵的低泄漏高效率性能.优化柱塞泵性能,建立了海水柱塞泵配流阀的数学模型,推导出了配流阀弹簧刚度、预紧力和阀芯开度的优化设计公式,同时利用AMESim对泵进行了建模和仿真,仿真结果表明:根据前述优化设计公式设计时,通过选取合适的参数,可以减小海水泵...     

多功能热泵冷热水机组研究及在医院设计中的应用探索

由于医院需要具有24 h热水供应能力,如何在满足使用需求的情况下节能减排,通过项目实际设计过程,提出了热泵冷凝热回收加热生活热水的解决方案,介绍了多功能热泵冷热水机组空调系统方案设计思路与国外运行案例数据的分析。