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Research on High Effective Utilizations of Water Evaporative Cooling Technology Based on Exergy Analysis of Virtual Cycles

Author: LiuGang
Tutor: CaoYang
School: China Academy of Building Research Institute
Course: Heating, Gas Supply , Ventilation and Air Conditioning Engineering
Keywords: Water evaporative cooling Heat and mass transfer equations Virtual loop structure ( Exergy ) analysis Spray water of different temperatures Energy-saving
CLC: TU831
Type: Master's thesis
Year: 2010
Downloads: 52
Quote: 0
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Abstract

Air conditioning energy consumption as a large building energy consumption, on the importance of energy conservation is self-evident. Water evaporative cooling technology has the unique role of \In this paper, relying on the national \spray water cooling effect of water evaporation, the principle of evaporative cooling learn from the results of previous studies based on direct water and heat and mass transfer process line analysis; direct water evaporative cooling process to establish a mathematical calculation model, and the derivation and simplification; for different temperature spray water on ηDECtw conducted theoretical analysis and experimental research. This article reads as follows: evaporative cooling of water in the first chapter of thermodynamics and heat transfer, mass transfer, based on a brief introduction to the basic theory of the two forms of water evaporation cooling limit, focusing on analysis The substance of the two limits. Established in the second chapter of the the virtual cyclic structure of the direct water evaporative cooling, and on the basis of the various stages in the cycle working fluid changes (?) Analysis theory, and pointed out that the direction of energy transfer by engineering thermodynamics (?) Method and quantity, and the equipment and systems of the energy conversion process optimized analyzed. Basis (?) Analysis of the theory of the two criteria, subsequent chapters lay the theoretical foundation for the improvement of the equipment or system specified direction. In the third chapter, the most common direct water use of recycled water evaporative cooling process to expand. In the analysis of the direct water evaporative cooling process, consider a different temperature spray water cooling effect of water evaporation, heat and mass transfer equations, scientific description of the direct water evaporation heat and mass transfer phenomena in the cooling process . Simplification direct evaporative cooling factors affecting water evaporation from the theoretically based on improved equipment performance criteria using enthalpy cooling humidification processes of heat and mass transfer equations were derived and solving, validation of heat and mass transfer equations rationality, and evaporative cooling effect of the water spray water of different temperatures with a focus on theory. The fourth chapter experimental studies for different temperature spray water cooling effect of water evaporation. Duct enthalpy method laboratory bench to direct water evaporative cooling air velocity u water vapor than μ to watering the temperature tw ηDEC affect the experimental study, using experimental data obtained fitting efficiency formulas and resistance formula corresponding analysis, preparation of standard water evaporation cooling air conditioning units, \Chapter discussed based on the criteria for increase the magnitude of the temperature drop for water evaporative cooling nested adaptability summarizes the the six basic structure of the (?) Conversion manner and (?) Efficiency characteristics; established in a particular case nested The efficiency of the calculation method.

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