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首页> 外文学位 >A study of a desuperheater heat recovery system complete with a reversibly used water cooling tower (RUWCT) for hot water supply.
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A study of a desuperheater heat recovery system complete with a reversibly used water cooling tower (RUWCT) for hot water supply.

机译：对过热器热回收系统的研究，该系统配有可逆使用的水冷却塔（RUWCT），用于热水供应。

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摘要

Recovering heat rejected from the condenser in a refrigeration system to generate service hot water for buildings is commonly seen in both tropics and subtropics. This study included a critical literature review on heat recovery from air-conditioning/refrigeration systems, with particular emphasis on the direct condenser heat recovery and its related mathematical simulation models. The review identified many applications of desuperheaters to small-scaled residential air-conditioning or heat pump units.; The heat and mass transfer characteristics of a RUWCT have been studied in detail, which is based on the theory of direct contact heat and mass transfer between moist air and water. The thesis reports on the differences in the heat and mass transfer process that takes place in a RUWCT, a standard water cooling tower and a spray room. A corrective factor that accounts for the change of chilled water mass flow rate is incorporated into the theoretical analysis of a RUWCT. The algorithms developed from the theoretical analysis are capable of predicting the heat exchange capacity of a RUWCT at any operating conditions. This theoretical analysis is the first of its kind.; Extensive field experimental work on the heat and mass transfer characteristics of a RUWCT has been carried out in a hotel building in Haikou, Hainan province of China, where the RUWCT is installed. Results from the experimental work indicate that the theoretical analysis can represent the heat and mass transfer characteristics in a RUWCT with an acceptable accuracy.; A numerical analysis for a RUWCT is undertaken to determine both air and water states at intermediate horizontal sections along the tower height. Field experimental data confirm that the predicted air and water conditions at the tower inlet and outlet are of acceptable accuracy.; A steady-state mathematical model is developed to simulate the operational performance of a water chiller plant complete with a desuperheater heat recovery system and a RUWCT. This model will be useful in future studies on the optimum design of a water chiller complete with a desuperheater and a RUWCT for heat recovery. (Abstract shortened by UMI.)
机译：在热带和亚热带地区，通常都可以回收到制冷系统中冷凝器排出的热量，从而为建筑物产生生活热水。这项研究包括有关空调/制冷系统热量回收的重要文献综述，尤其着重于冷凝器直接热量回收及其相关的数学模拟模型。审查确定了减温器在小型住宅空调或热泵机组中的许多应用。基于直接接触热和湿空气与水之间的传质理论，对RUWCT的传热和传质特性进行了详细的研究。本文报道了在RUWCT，标准水冷却塔和喷淋室中发生的传热和传质过程的差异。 RUWCT的理论分析中加入了一个校正因子，该校正因子说明了冷冻水质量流量的变化。从理论分析得出的算法能够预测RUWCT在任何运行条件下的热交换能力。这种理论分析尚属首次。在安装了RUWCT的中国海南省海口市的一家酒店大楼中，进行了关于RUWCT的传热和传质特性的广泛野外实验工作。实验工作的结果表明，理论分析可以以可接受的精度表示RUWCT中的传热和传质特性。进行了RUWCT的数值分析，以确定沿塔高的中间水平截面处的空气和水状态。现场实验数据证实，塔入口和出口处的预计空气和水状况具有可接受的精度。建立了稳态数学模型，以模拟配备了减温器热回收系统和RUWCT的冷水机组的运行性能。该模型将在未来对配备减温器和RUWCT的冷水机组进行优化设计的研究中很有用。 （摘要由UMI缩短。）

著录项

  • 作者

    Tan, Kunxiong.;

  • 作者单位

    Hong Kong Polytechnic (People's Republic of China).;

  • 授予单位 Hong Kong Polytechnic (People's Republic of China).;
  • 学科 Engineering Mechanical.; Energy.
  • 学位 Ph.D.
  • 年度 2000
  • 页码 192 p.
  • 总页数 192
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 机械、仪表工业;能源与动力工程;
  • 关键词

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