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The Operating Performance Analysis of GSHP with the Heat and Moisture Transfer in Unsaturated Soil

Author: DuMeiXia
Tutor: WangJingGang
School: Hebei University of Engineering
Course: Heating,Gas Supply, Ventilation and Air Conditioning Engineering
Keywords: Ground source heat pump Ground heat exchanger Heat and moisture transfer effect Numerical solution Operating characteristics
CLC: TU831
Type: Master's thesis
Year: 2011
Downloads: 39
Quote: 0
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Abstract


The main line to the ground heat exchanger , heat and moisture transfer process , consider soil moisture on the ground heat exchanger heat transfer process , coupled heat and mass transfer equations , numerical solution , and analyze the different run mode , the initial moisture , initial temperature , and heat release of soil temperature field and moisture field . On this basis the operating characteristics of the ground source heat pump system to expand the theoretical and experimental studies . The main contents of this paper are as follows : 1 . Vertical U-shaped pipe heat exchanger coupled heat and moisture transfer model . The article first introduces the basic parameters and thermal parameters of the soil of this porous medium . And the porous medium heat and moisture transfer mechanism and coupled heat and moisture transfer model to elaborate . Saturated soil ground heat exchanger is one-dimensional heat and moisture transfer coupling of physical and mathematical models based on conservation of energy and mass conservation . The numerical solution of the model . The finite difference method for the construction of a mathematical model , equation discrete time nodes forward difference space node central difference implicit format ; using VB language the two sets of discrete equations coupled iterative process . 3 . Analysis of the factors influencing the process of heat transfer coupled heat and moisture . Ground heat exchanger coupled heat and mass transfer process is affected by the initial ground temperature , initial moisture , heat release and run mode . Solve the model to simulate the impact of various factors on soil temperature field and moisture field . 4 . Analytical model of ground source heat pump system is running . Correlations established for each major component of the ground source heat pump operating characteristics of the model , and fitting the system cooling capacity row calorie consumption power and system performance on the condenser inlet water temperature ( to pipe outlet water temperature ) . 5 coupled heat and moisture transfer model verification . Built in order to verify the coupled heat and moisture transfer model , experimental study of ground source heat pump operating characteristics and temperature field simulation and experimental results for two modes of operation . Show that the basic model with the experimental results , but flawed and needs to be further improved .

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CLC: > Industrial Technology > Building Science > Housing construction equipment > Air-conditioning, heating, ventilation,and its equipment > Air-conditioning
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