空气源热泵系统无霜化方法概述

从提高空气温度和改变空气湿度两方面详细阐述了空气源热泵系统无霜化处理方法,简单介绍了各方法的原理及相对除霜式空气源热泵所具有的优势.最后对空气源热泵无霜化的研究方向进行展望:可以利用余热或太阳能提高流经室外换热器空气的温度以实现无霜化;进一步研究固体除湿剂在低温环境下的吸附能力和再生能力;重点探究除湿溶液的再生方法以及...     

Experiments on heat-regenerative adsorption refrigerator and heat pump

A heat-regenerative adsorption refrigerator using spiral plate heat exchangers as adsorbers and an adsorption heat pump for air conditioning using plate fin heat exchangers as adsorbers have been developed and researched, experimental research results are shown. The activated carbon–methanol adsorption pair is used for the two adsorption systems, which yield a refrigeration power density of more than 2·6 kg ice per day per kg activated carbon and 150 W kg⁻¹ activated carbon for air conditioning, respectively. © 1998 John Wiley & Sons, Ltd.     

Identification of zeolites for heat transformer,chemical heat pump and cooling systems

Among the gas-solid adsorption processes the zeolite water adsorption seems to be very interesting for use in thermodynamic systems such as chemical heat pump, heat transformer and cooling systems. This work evaluates theoretically the best type of zeolite for use in each system on the basis of the adsorption data of zeolites using prefixed operative conditions. Results obtained indicate that thermodynamically a given zeolite type achieves better results than the others for each of the abovementioned systems. Methodology and criterion of comparison used can be applied to other gas-solid processes aiming at realizing chemical heat pump, heat transformer and cooling systems.     

复合式土壤源热泵的研究现状及发展趋势

综述了国内外复合式土壤源热泵系统应用研究的最新进展和研究成果,分析了土壤热平衡问题的形成原因、解决方案,以及目前常用的几种复合土壤源热泵系统的工作原理,对比了不同连接方式的优缺点,并对系统存在的问题提供了相应的解决办法,以及对复合式土壤源热泵未来的发展及研究的方向提出了新的观点。     

Chemical heat pump using heat of reversible catalytic reactions

One of the most important objects of research in the field of energy conservation is development of a high temperature heat pump for the industrial sector. In this framework this paper introduces a new concept of heat pump, which is a hybrid between a compressor and chemical heat pump, where instead of the latent heat of liquids, the proposed system uses the heat of gaseous catalytic reversible reactions (type A → B + C). This paper proposes a simple scheme with a mathematical model for the calculation of the parameters necessary to qualify the behaviour of the Heat Reaction Chemical Heat Pump (HRCHP). The Coefficient of Performance (COP) is calculated as a function of the temperature of the heat source, the temperature to which the pump upgrades the heat and the conversion of the chemical reaction. A more optimized scheme is prospected.     

Performance study of a heat pump dryer system for specialty crops—Part 1: Development of a simulation model

This research is concerned with the technology of heat pump assisted drying of specialty crops. A simplified procedure for modelling the performance of a low temperature heat pump dryer was developed. The system modelled consists of a vapour compression heat pump coupled to a continuous cross flow bed dryer. The model takes into account the detailed heat and mass transfer phenomena taking place in the heat pump and dryer circuits. Copyright © 2002 John Wiley & Sons, Ltd.     

Potential of a direct contact adsorption heat pump system for generating steam from waste water

An adsorption heat pump with a direct contact system for steam generation has been developed and the feasibility of the proposed system was confirmed both theoretically and experimentally. The basic cycle for the system has been proposed to use zeolite–water working pairs in the p‐T‐x equilibrium curve. To generate steam above 150°C from low‐energy level water at 80°C, a direct contact adsorption heat pump prototype was constructed. The experimental results show that steam could be generated by the direct contact system and the relationship between the amount of water adsorbed and the change in temperature with time is discussed. This study is expected to serve as a foundation for developing continuous adsorption heat pump systems for steam generation. Copyright © 2011 John Wiley & Sons, Ltd.     

ADSORPTION HEAT PUMP USING HFC REFRIGERANTS

This work is concerned with the investigation of an adsorption heat pump using hydrofluorocarbon (HFC) refrigerants. A small-scale rig was used to study the performance of several combinations of refrigerant and activated carbon which might be used in an adsorption heat pump. Experimental results are presented here together with conclusions and suggestions for further work. © 1997 by John Wiley & Sons, Ltd.     

CO2双级压缩制冷热泵循环系统的研究

关于CO2双级压缩制冷热泵循环系统的研究是目前一些生活服务行业最大的制冷热泵的循环需求,例如在餐厅、宾馆、理发店等地方对于循环系统的寻求.研究了关于CO2双级压缩制冷热泵循环系统的工作原理,及该系统今后的发展方向.     

太阳能热泵供热系统实验台的设计及误差分析

开发新能源和节能是寻找能源出路的两大途径,太阳能热泵系统以其显著的节能性和环保性具有广阔的发展前景。介绍了太阳能热泵供热实验台集热器、蓄热器等设备的设计,分析了集热器集热效率的测试误差,指出太阳能热泵供热实验台测试数据准确、可靠,为太阳能热泵供热系统的设计、安装和运行提供了有价值的参考依据。     

固体吸附式制冷强化传热研究进展

吸附床的传热强化是影响固体吸附式制冷的主要因素。简述了吸附制冷的强化传热研究进展,介绍了几种常用的吸附床强化传热方法,提出了固体吸附式制冷强化传热的研究方向。     

Heat and mass transfer in super active carbon/ethanol adsorption heat pump with a packed bed type adsorber

The possibility of producing cold heat energy by a super active carbon/ethanol adsorption heat pump (AHP) with a packed bed type adsorber is discussed on the basis of both experimental and calculated results of the transient behavior accompanied by this operation. The trend in experimental results for heat and mass transfer agrees well with computer simulation for closed-system, one-component, non-isothermal conditions in both the adsorption and desorption processes. The super active carbon/ethanol AHP proposed generates a high level of cold heat energy by raising the desorption temperature. Therefore, this AHP is applicable to a refrigerator. However, it is suggested that enhancement of heat transfer in the adsorber is indispensable to obtain a high power from this type of AHP. © 1997 Scripta Technica, Inc. Heat Trans Jpn Res, 25(7): 466–475, 1996     

太阳能热泵的研究及应用

本文综述了太阳能热泵在国内外的研究现状、应用情况以及一些公开发表的有关太阳能热泵技术的研究成果,列举了太阳能热泵的应用实例和效果,并指了出太阳能热泵的特点及其发展前景。     

深层地埋管换热器换热性能模拟及稳定性研究

以深层地源热泵地埋管换热器为研究对象,对其换热特性进行数值模拟和实验研究。建立考虑轴向地温梯度的深层地埋管换热器传热模型并进行模拟计算,通过示范工程现场测试数据验证该模型的正确性。对深层地埋管换热器换热的性能稳定性进行研究,发现深层地埋管换热器连续长期运行及间歇长期运行下换热性能基本稳定。当按不同运停比运行时,岩土温度恢复效果良好。研究结果表明深层地源热泵有较好的换热性能及运行稳定性,为深层地热能的开发利用提供了新思路。     

高温热泵及热泵蒸汽机的研究进展

本文从新型工质的研发和系统效率的提高两方面综述了高温蒸汽压缩式热泵的研究现状,对于高温吸收式热泵,则从新型循环设计、系统控制与仿真、参数优化、提高换热效率等方面做了综述。文章最后介绍了国内外最新研制的两种热泵蒸汽机的运行原理和结构特点,并根据热泵蒸汽机组的运行要求,提出了今后的研究方向和要解决的主要技术问题。     

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.     

Improvement of both adsorption performance of silica gel and heat transfer characteristics by means of heat exchange modulation for a heat pump

In order to provide high performance silica gel for an adsorption heat pump (AHP), gels were synthesized using the sol-gel process modified with a new method of controlling the primary gel particle growth by the addition of aluminum ion. In this process, the pores of the silica gel synthesized became smaller when aluminum ion was added in the washing process. Furthermore, this silica gel adsorbed more water at a low region of water vapor pressure and its adsorption ability did not change after 100 repetitive times of adsorping/desorping water vapor. The experimental results from the water vapor adsorption on the silica gel agreed well with theoretical results obtained under the Lump model for heat transfer and intraparticle diffusion model for mass transfer. A new direct heat exchange silica gel module (DS-module) for the AHP was provided, and the heat transfer characteristics during the operation for the adsorption of water vapor were both experimentally and theoretically determined. The period of the adsorption for the DS-module was shorter than that for a silica gel/tube module. Therefore, with the addition of the DS-module the heat transfer in the AHP adsorber was sufficiently enhanced and the maximum heat generation power for the 2-mm-thick DS-module was obtained. © 1997 Scripta Technica, Inc. Heat Trans Jpn Res, 25(7): 420–433, 1996     

中高温热泵技术在工业余热回收中的应用

我国许多行业对热源的需求温度多集中在75～200℃之间，且存在着低温余热大量浪费的情况，可以把热能由低温位热源转移到高温位热源的中高温热泵技术有着巨大的应用空间。对高温热泵的研究多集中在适宜工质的选择和制热效率提高这两个方面。国外的研究起步较早，混合工质方面的研究成果目前仍处于技术保密阶段。国内研究起步较晚，主要研究成果集中在高校，但尚未找到一种公认的环境友好、性能优越的高温热泵工质。近几年，国内在油田含油污水的余热回收．坑口电厂冷却水和矿井涌水的余热回收，涂装、电镀车间余热回收等领域进行了高温热泵技术的实际性工程应用，经济效益和环保显著．不仅节省了大量的化石能源，而且减少了二氧化碳的排放。但高温热泵技术在实际应用中还存在设备腐蚀等问题．需要结合余热源的具体情况采取相应的措施加以解决。     

Adsorption heat pumps for providing coupled heating and cooling effects in olive oil mills

The olive oil mill wastewater presents serious environmental threats. In this study, adsorption heat pumps utilizing zeolite coatings were proposed for olive oil mills as a helping tool for the treatment of wastewater, as well as for providing a cooling effect, which may especially be useful to prevent thermal deterioration of the olive oil. The performance of a heat pump using two adsorbers operating with waste heat was determined for different operating conditions. It was established that a sufficiently high amount of olive oil wastewater might be treated in such a system when a suitable source of waste heat is used for heating the adsorbers of the heat pump. Copyright © 2007 John Wiley & Sons, Ltd.     

基于流态冰的冰源热泵能效及经济性研究

基于流态冰的冰源热泵可以利用近冰点淡水或海水相变潜热作为热源,具有采暖能效高、适用性广的特点。为研究新型冰源热泵在采暖期的能效及经济性,选取我国典型供暖区域的5个城市作为研究对象,结合近5年采暖期各城市的气象参数,分别模拟计算空气源热泵、冰源热泵、地源热泵的系统能效。通过计算各热泵机组的初投资及采暖期运行费用,确定了不同类型热泵系统的静态投资回收期。结果表明,本文提出的新型冰源热泵在采暖期的系统能效较高,为2.8 ~ 3.2。相较于空气源热泵和地源热泵,哈尔滨地区冰源热泵系统的初投资及运行费用最低,不存在静态投资回收期。在北京、郑州、武汉、南京地区的静态投资回收期分别为3.0年、5.1年、2.3年、2.6年。基于流态冰的冰源热泵在冬季供暖方面有很好的应用前景。