二热源制冷循环理想回热的判据

提供了一个判断二热源循环是否具备理想回热条件的普遍判据，并用它讨论两类重要二热源循环的理想回热问题。强调了研究回热时应深入分析热量的质，同时还指出一些文献中有关理想回热断的错误。     

回质回热过程对硅胶-水吸附机性能的影响及优化分析

在硅胶-水吸附机组中,采用水作为热管工质,这样使得热管工质和制冷工质一致,避免了不同工质而引起的渗漏问题。机组的加热/冷却切换是通过控制水路阀门来实现的,所以系统无需真空阀门。另外,在两个隔离器水盘间,安装了毛细管,这样可以避免单个吸附床缺水问题。对机组进行了回质和回热研究。回质过程可以有效提高系统的性能,进一步研究了热水进口温度对回质过程的影响。最后研究了回热对系统COP的影响,并讨论了回热过程的优化。研究表明:机组具有较好的吸附制冷性能,当热水进口温度/冷却水进口温度/冷水出口温度分别为79.2/29.6/14.9℃左右,回质时间为90s,回热时间30s,机组的制冷功率为15.3kW,性能系数(COP)为0.50;当热水进口温度/冷却水进口温度/冷水出口温度分别为64.8/29.6/15.2℃左右,回质时间为180s,回热时间30s,机组的制冷功率为7.5kW,COP为0.36。     

五种回热式低温制冷机的实验与分析

介绍了我们多年来进行５种类型回热式低温制冷机的实验研究的结果，这些制冷机包括Ｓｔ，Ｖ－Ｍ，Ｇ－Ｍ，ＳＶ和ＰＴ等，特别对工质热力学、操作工况和回热材料的选择等进行了分析和讨论。     

R410A回热循环的热力分析

R410A是一种新型环保的制冷剂,针对R410A回热循环方面的性能加以分析。将不采用回热循环时的单位容积制冷量、单位容积压缩机耗功、COP与回热循环后的参数做比较,得出单位容积制冷量、单位容积压缩机耗功、COP随回热蒸发温度及回热过冷度变化时的变化情况,对R410A是否采用回热循环及在什么情况下采用回热循环具有一定意义。     

回热循环燃气轮机中回热器的动态特性研究

采用多段集中参数模型对具有分布参数特性的回热器建模，简化了由偏微分方程带来的大量计算，应用Matlab／Simlink软件作为仿真平台，采取数值方法求解，对具体回热燃气轮机中的回热器进行了仿真，结果表明，回热器时间常数较大，在回热循环燃气轮机仿真中回热器的热惯性不能忽略，而且是影响系统平衡稳定性的重要因素．     

制冷系统二级变量控制的应用研究

本文研究了带冷凝回热调节的供冷水系统通过检测出水温度实施回热调节和风机转速控制的方法。研制了以单片机为中心的控制系统,编制了控制软件,在负载负荷变化的情况下,以出水温度和冷凝压力信号为输入对冷凝回热调节阀和风机进行控制,通过PID参数的调节,调节回热调节阀开度和风机转速。     

吸附式制冷循环的分析

以吸附式制冷循环的热力过程为依据，使用火用分析的方法对连续回热循环做了分析，对循环中各部分火用损进行了比较。指出了连续回热循环中火用损的主要部位，并探讨了回热率及吸附床的传热性能对循环火用效率的影响。     

回热损失对磁斯特林制冷循环制冷率的影响

从铁磁质的磁化强度一般表示式出发，探讨热阻和回热损失对磁斯特林制冷循环性能的影响，导出最大制冷率及其它性能参数。得到了结果适用于以顺磁质为工质的磁斯特林制冷循环。并指出在理想回热条件下的结论也适用于磁卡诺制冷循环。     

吸附式制冷循环的yong分析

以吸附式制冷循环的热力过程为依据，使用yong分析的方法对连续回热循环做了分析，对循环中各部分yong损进行了比较，指出了连续回热循环中yong损的主要部位，并探讨了回热率及吸附床的传热性能对循环yong效率的影响。     

用混合铁磁工质改善磁埃里克森制冷循环的回热性能

根据磁性材料的比热和熵的特性，讨论了采用混合铁巴工质可使磁埃里克森制冷循环实现理想回热或趋近于理想回热，而用混合顺磁工质则难达此目的．实验上也得到了相同的结论．     

Performance improvement of adsorption cooling by heat and mass recovery operation

An adsorption cooling system was developed and tested and various operation procedures have been tried. The experimental results show that the heat recovery operation between two adsorption beds will increase the COP by about 25% if compared with one adsorber basic cycle system. It was also proved that mass recovery is very effective for heat recovery adsorption cooling operation, which may help to obtain a COP increase of more than 10%. Theoretical analyses on the COP have been completed for various heat and mass recovery cycles, such as basic intermittent adsorption cycle, continuous two-adsorber heat recovery cycle, mass recovery cycle, mass recovery with sensible heat recovery, and mass recovery with both sensible heat and heat of adsorption recovery. The theoretical results are in good agreement with experimental values. Based upon the developed theoretical model, it is possible to predict the COP for various operation procedures of a real adsorption cooling system.     

热回收技术在排风系统中的应用

阐述了排风热回收系统的重要意义,介绍几种不同类型的热回收设备,重点介绍一种新型的热回收方式——热质循环能量回收方式（热质微循环和大循环技术）;分析这种能量回收方式的回收原理及其在排风热回收领域的优势。同时展望这一技术的发展。     

热回收型热管式间接蒸发冷却器的传热传质机理及优化设计

本文分析了热管式间接蒸发冷却器的传热传质机理。运用能量守恒定律及传热学的研究方法,对热管间接蒸发冷却器进行传热传质实验研究,并根据运行参数对冷却效率的影响,提出了增强换热传质,提高换热效率E的方法,为优化设计热管间接蒸发冷却器提供了理论与技术依据。     

燃料电池汽车余热驱动吸附制冷系统方案研究

使用环保型制冷工质和节能是汽车空调发展的必然趋势，燃料电池汽车余热驱动的吸附式制冷系统正好符合这一趋势。本文通过综合比较，选择活性炭-甲醇工质对作为吸附工质对，采用两床连续回质循环方式，并初步确定了燃料电池汽车余热驱动的吸附式制冷系统方案。     

Experimental investigation of a novel multifunction heat pipe solid sorption icemaker for fishing boats using CaCl2/activated carbon compound–ammonia

The performance of a solid sorption icemaker is investigated. CaCl₂/activated carbon was used as compound adsorbent and ammonia was employed as adsorbate. The influence of operating conditions (cooling water temperature, mass recovery and heat pipe heat recovery, etc.) on the mass of ice, SCP (specific cooling power) and COP (coefficient of performance) was experimentally assessed. At the desorption temperature of 126 °C, cooling water temperature of 22 °C, ice produced temperature of −7.5 °C, 40 s of mass recovery and 2 min of heat pipe heat recovery, the mass of ice, SCP and COP values are 17.6 kg/h, 369.1 W/kg and 0.2, respectively.     

双效溴化锂吸收式热泵余热回收系统数值模拟研究

溴化锂吸收式热泵机组可以有效回收利用工业和建筑中的各种形式低温余热,提高余热资源回收率,但设备参数对热泵性能影响很大。因此本文基于温度对口和梯级利用的原则,对蒸汽型双效溴化锂吸收式热泵机组内传热部件进行热力及传热分析,通过质量和能量守恒建立热泵机组数学模型,分析热网供水温度、蒸发器进口低温余热水温度和驱动热源温度这三个外部因素的变化对系统性能的影响。研究结果表明:热网供水温度在49℃左右,热泵系统COP最佳为2.67;蒸发器进口低温余热水温度在47℃左右时,热泵系统COP最佳为2.67;随着驱动热源温度的上升,热泵系统的COP呈上升趋势。为吸收式热泵实际运行过程中,合理设置设备参数提高热泵性能提供指导。     

A method for evaluating the heat and mass transfer characteristics in a reversibly used water cooling tower (RUWCT) for heat recovery

In sub-tropical regions, a standard water cooling tower may be reversibly used, as part of a desuperheater heat recovery system for service hot water heating, to extract free heat from ambient air in colder seasons when building cooling load is reduced. Chilled water is pumped into a reversibly used water cooling tower (RUWCT) where it is heated by warmer ambient moist air. This paper presents a method by which the heat and mass transfer characteristics in a counter-flow RUWCT can be evaluated. The method is developed by introducing to the Merkel's equation for standard water cooling towers the revisions that account for the differences in heat and mass transfer characteristics between a water cooling tower and a RUWCT. Field experimental results from a RUWCT installed in a sub-tropical region in China indicated that the method developed could be used to evaluate the thermal performance of a RUWCT with an acceptable accuracy.     

空气源热泵回收空调系统排风能量的节能利用探讨

文章对目前空调系统排风中能量回收利用过程中存在的不足进行了理论分析和相关的技术数据比较,提出了基于空气源热泵空调排风的深度节能利用方案,即把空调系统排风引入到空气源热泵室外换热器,利用空调系统的排风具有的能量来加强空气源热泵室外换热器的换热强度,从而提高空气源热泵的制冷、制热系数和机组的制冷(热)量,减少电能消耗。该方案在技术上可行,初投资小、回收年限短、能量回收率高(可以达到100%)、节能效果显著。     

Mass recovery adsorption refrigeration cycle—improving cooling capacity

The study investigates the performance of two-bed, silica gel-water adsorption refrigeration cycle with mass recovery process. The cycle with mass recovery can be driven by the relatively low temperature heat source. In an adsorption refrigeration cycle, the pressures in adsorber and desorber are different. The chiller with mass recovery process utilizes the pressure difference to enhance the refrigerant mass circulation. Cooling capacity and coefficient of performance (COP) were calculated by cycle simulation computer program to analyze the influences of operating conditions. The mass recovery cycle was compared with conventional cycle such as the single stage adsorption cycle in terms of cooling capacity and COP. The results show that the cooling capacity of mass recovery cycle is superior to that of conventional cycle and the mass recovery process is more effective for low regenerating temperature.     

热回收型多联机空调系统节能分析

热回收型多联机空调系统可以将部分空间的热量有效地转移到其他空间并加以利用,达到热量回收的目的。本文对热回收型多联机的原理、结构、运行模式和节能特性进行详细分析,并通过试验验证热回收工况下机组的能效比最高可达到普通多联机的2倍,在主体制冷及主体制热场合其能效比也远超普通多联机组。