As the building's outer wall consists of hollow blocks, the hollow hole will transfixion. According to the characteristic, this article proposes a technical method of indoor ventilation, which uses a hollow hole as channel and takes exhaust blower as the power which frequently use in the kitchen and bathroom, then carries on the simulation of ventilated effect for a typical room by the CFD method. With the analysis of the simulation result, the effect of ventilation is fine, and the method can solve the question effectively of city and countryside indoor air quality deterioration, and then achieves the goal of energy conservation.
9th International Symposium on Heating, Ventilation and Air Conditioning, ISHVAC 2015 Joint with the 3rd International Conference on Building Energy and Environment, COBEE 2015
July 12, 2015 - July 15, 2015
(1) College of Civil Engineering, Hunan University, Changsha, Hunan, China; (2) Centre for Zero-Energy Building Studies, Department of Building, Civil and Environment Engineering, Concordia University, Montreal; QC, Canada; (3) College of City Construction, University of South China, Hengyang, Hunan, China
Coupled heat and moisture transfer;Optimum insulation thickness;Lifecycle total cost;Lifecycle saving;Payback period
Thermal insulation plays an important role in achieving building efficiency. Many engineering investigations were carried out to determine the optimum insulation thickness. In this paper, a coupled heat and moisture transfer model is presented to calculate the annual energy consumption. Then, the lifecycle total cost is analyzed by the P1-P2 economic model. Based on lifecycle total cost analysis, the optimum insulation thickness is determined. Three representative cities, viz. Changsha, Chengdu and Shaoguan, are chosen as the sample cities. The optimum insulation thickness, lifecycle saving and payback period are estimated. The results show that the optimum thickness of extruded polystyrene (XPS) is between 0.053 and 0.069m and the optimum thickness of expanded polystyrene (EPS) is between 0.081 and 0.105m. The maximum lifecycle saving varies from 16.60 to 28.50$/m2 and the payback period varies from 1.89 to 2.56 years. EPS is more economical than XPS as insulation because of its lower lifecycle total cost. (C) 2015 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
Based on long-term testing and recording of room temperate in a bedroom of residential buildings in the hot summer and cold winter zone, this assay focuses on comparative analysis of tested results and simulated results derived from the DeST software. It verifies the rationality and reliability of the DeST software, showing the feasibility that software DeST can be applied to analyze the energy consumption of residential building in hot summer and cold winter zone.