| A typical timber frame residence which is located in Harbin area is experimentally investigated and numerically studied,The timber frame residence wall insulation performance and indoor thermal environment is analyzed.And the experimental data is utilized to validate the data of energy consumption simulation model and CFD simulation model. What’s more,the energy efficiency of the light wood structure and other structures is compared by the simulation of energy consumption.The wall of timber frame residence was energy-saving designed and optimized,and the method of the energy conservation design optimization of light wood structure wall which is applied in cold area is summarized.At first, the method of field experiment was used to detect the temperature and humidity of the light wood structure. In January 12,2015~March 12 th and October 20,2015~March 14 th,2016, the average outdoor temperature of the residence is-8.4 and-6.1 degrees respectively,the average indoor air temperature of experimental residential is 24.6 and 24.7 degrees respectively.In the first detection, the data of the temperature in the Office at 22~24 degrees accounted for 63.7%.The outdoor average relative humidity was 61.3%, the average indoor relative humidity was 12.8%. the indoor relative humidity is relatively stable in the outdoor humidity fluctuation. Thus it can be seen that the temperature and humidity regulation performance of the light wood structure house is excellent.The heat consumption and heat transfer coefficient of wall of light-frame timber residence is also detected.The average heat transfer coefficient of light wood structure housing wall structure is 0.212W/m2, is 15.2% lower than the limit value of China’s current energy-saving 65% of the standard provisions of the wall heat transfer coefficient. The measured average heating energy consumption for 11.6 W/㎡, is 49.3% lower than the heat consumption index value 22.9 W/㎡,which is specified in <the cold and the cold area residential construction of energy-efficient design standards>JGJ26-2010 in Harbin area.Secondly, the software Energyplus residential model is established, the model is verified by the experimental data.And then energy consumption simulation is presented with light wood frame residences and brick structure, reinforced concrete structure residence, through comparative analysis,the light wood structure residence can save 38.3% of energy than the brick concrete structure,40.7% of energy than the reinforced concrete structure residence.Thirdly, the numerical model is established by Flo VENT simulation software, and the model is verified by the experimental data. Through access to information and research, and combined with the climate characteristics of the cold area, on the basis of the light wood structure housing wall structure, six kinds of wall structure scheme are designed, the Flo VENT simulation software is used to simulate each of the structure, through comparative research study of wall insulation performance and the indoor thermal environment,the optimization scheme is obtained, and the method to improve the external wall energy-saving design and optimization is summarized, which provides a reference for the light wood structure housing wall structure designwhich is suitable to be used in cold regions.Finally,the energy consumption of the external wall optimization scheme in the heating season was simulated by Energyplus software, and compared with the original structure of the residential energy consumption simulation.After optimization, the total energy consumption of the original plan is saved by 1.1GJ, and the standard coal saving is 37.5kg, and the amount of carbon dioxide emission reduction is 93.6kg. |
