穩定熱源之建築物室內溫度流場研究 : 數值模擬與實場測量比較

機構典藏 > College of Engineering > Graduate Institute & Department of Civil Engineering > Thesis > Item 987654321/87861

Please use this identifier to cite or link to this item: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/87861

Title:	穩定熱源之建築物室內溫度流場研究 : 數值模擬與實場測量比較
Other Titles:	A study on the flow fields inside the building with the steady thermal source : numerical and field measurement data
Authors:	李勁甫;Lee, Chin-Fu
Contributors:	淡江大學土木工程學系碩士班李勁甫;Lee, Chin-Fu
Keywords:	室內模擬;室內流場;對流模擬;室內溫度場;穩態;FLUENT;CFD;k-ε;steady;room;temperature;RNG
Date:	2012
Issue Date:	2013-04-13 11:49:04 (UTC+8)
Abstract:	由於現在人對於居住舒適度越來越重視，運用數值模擬能全方面的看到住宅的溫度、風速、濕度等的變化，然而模擬的結果是否可靠這點仍讓許多人產生疑問，所以本研究是模擬穩態室內溫度場，並定義出相關重要的參數，以供之後進行室內溫度場分析的人做參考。研究分成實場測量與數值模擬兩大部分，實場測量採用一薄壁木造房間進行探討，由於房間整體是薄壁結構所以對於熱通量的影響就會相當明顯，由此來對熱通量與溫度對於室內溫度模擬的差異。此外除量測溫度外還加入了濕度的測量，此後將溫度與濕度條件導入至模擬分析時所需的邊界條件。經由多次經驗瞭解到許多測量上可能會發生誤差的情況，包含：儀器本身的誤差、測頭銲接不良造成的誤差、測頭壞損的誤差……等，對於這部分做成表格並寫出其誤差情況以便後人對照，不至於再犯同樣的錯誤。數值模擬分成建模與分析，其中又以建模為最重要的部分，此因模型的好壞會影響到模擬的準確性與收斂情況，為了使數值模擬有良好表現必須對於模型的品質有嚴格的要求，對於網格採用結構性網格並避免網格曲率高達0.8以上。濕空氣性質部分則參考了P.T.Tsilingiris所寫的研究，將濕空氣的密度、導熱係數、比熱和黏度定義出來，再將所得的模擬結果分析討論得到較佳的模擬方式，最後再找一適當的真實房間，以之前所得的模擬方法帶入，完成最後驗證。本研究是討論數值模擬的可行性，並對於各個模擬參數進行討論，就以研究結果已知對於室內溫度模擬中最難定義的參數為熱通量，希望未來能找到簡易的方法計算，使室內模擬能更加容易。 People attach importance to the living environment comfortable, while the use of numerical simulation to understand that residential change of temperature, wind speed, humidity, etc. This study is to simulate the steady-state interior temperature field, define important parameters for the indoor temperature field analysis after a reference. The objective of this research is to provide the tools used to predict ventilation performance and pollutant dispersion in buildings. Research into actual field measurements and numerical simulation of two parts, the first this study is the wooden room to explore. The rooms are thin-walled structures so will the impact of the heat flux is fairly obvious, which for the simulation of the indoor temperature to the heat flux and temperature difference. In order to calculate the wall heat flux, temperature monitoring points were set up on the wall, to validate the relationship between the real field and the simulation. In addition, the amount of temperature-givers also joined the measurement of humidity, for the temperature and humidity conditions to import to the boundary conditions of the simulation analysis required. Learned a lot of measurement error may occur by the number of measurement experience, including: instrument inaccuracy, welding the inaccuracy caused by poor probe corrupted inaccuracy,etc. These conditions are made form and write the error in order to control future generations, and will not make the same mistake Numerical simulation is divided into the make model and analysis, make model the most important because the quality of the model will affect the simulation accuracy and convergence. In order for the numerical simulation it is necessary for the quality of the model has strict requirements for mesh structured grid and to avoid the grid curvature up to 0.8 Humid air settings reference P.T. Tsilingiris research, and define the moist air density, thermal conductivity than the heat and viscosity calculations, the simulation results obtained better simulation Finally, find an appropriate room, and before from the simulation to verify the results of previous experiments. This study is the steady simulations to find a faster simulation method of the indoor flow field, to let indoor simulation can be more easily
Appears in Collections:	[Graduate Institute & Department of Civil Engineering] Thesis

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