A Study on Energy Analysis of Buoyancy-Driven Ventilation

• Main Authors: Tzung-Hau You, 游宗皓
• Other Authors: Wen-Shing Lee
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/af9gb6

碩士 === 國立臺北科技大學 === 冷凍空調工程系所 === 98 === In this thesis, the main issue is comparing the energy efficiency between office with buoyancy ventilation set up and without set up. buoyancy ventilation and find out the suitable program for this climate zone ventilation design. The simulation model is located in Changzhou, China Regional Office for the actual cases. Buoyancy ventilation is using the principle that the hot air will rise when the density is becoming smaller, and it will make the room ventilated. In addition to fresh indoor air quality, but also can reduce the room temperature in the office. It can also postpone the operation of fan and reduce fan energy consumption. This research uses CFD (Computational Fluid Dynamics) numerical analysis method, using the computational fluid dynamics simulation software Airpak 3.0. The model uses factors of setting ventilation or not, the opening area of ventilation, the roof with or without insulation, setting additional small ventilation tower. And according to simulation results, to develop improved energy efficiency of the opening area of ventilation and opening position. According to the capacity of saving fan power consumption, China Changzhou Office can save 68% power consumption at least with buoyancy ventilation set up in Spring and Fall and save about 9180kWh. Setting up insulation in the roof is better, because it can save 70% power and around 9450 kWh.