Research On Characteristics And Optimization Of Thermal Environment And Thermal Comfort Of Ice And Snow Buildings

In the fourth meeting of the National People’s Congress,General Secretary Xi put forward the instruction that "green water and green mountains are golden mountains and silver mountains,and ice and snow are also golden mountains and silver mountains".Heilongjiang Province,located in the severe cold region,has great advantages in the development of ice and snow resources.Ice and snow architecture,a structural form with great regional and seasonal characteristics,not only plays a role in ice and snow tourism,but also has potential value for development in polar regions and severe cold regions.This paper conducts research on the internal environmental comfort and heating energy consumption of ice and snow buildings,systematically analyzes the research status of related theoretical content,and the existing shortcomings,and proposes the main research content and framework: thermal environment testing and thermal comfort field investigation of ice and snow buildings,Analysis of thermal environment test results and thermal comfort analysis of ice and snow buildings,CFD simulation of thermal environment of ice and snow buildings,and numerical experiments of ice and snow buildings under heating strategies with different body shape coefficients.First,the on-site internal environment test is carried out for the actual ice and snow building ice restaurant,and the measured parameters of the indoor and outdoor environment and the thermal test parameters of the envelope structure are obtained.At the same time,an on-site investigation of thermal comfort was conducted on the indoor thermal environment,combined with the thermal comfort index standard effective temperature SET* and the average overall thermal sensation vote MTSV in the questionnaire survey to fit a linear equation to obtain a thermal sensation prediction model for ice and snow buildings.Secondly,three-dimensional modeling is carried out for the actual test items of the ice restaurant,and the test results at the typical time on the test day are used as the boundary conditions of the CFD numerical simulation.Based on the established ice restaurant model,the optimization simulation of the thermal environment of the ice restaurant is completed by optimizing the layout of the ventilation openings of the ice restaurant.Finally,based on the one-dimensional unsteady state envelope heat conduction equation and the room air heat balance equation,the heat balance equation of the ice and snow building room is obtained.Combine C language programming to solve a variety of working conditions.According to the figure coefficient,three types of ice and snow buildings are proposed: small,medium and large.Taking the outdoor air design temperature,the number of air changes in the building,and the power to provide heating energy as variables,the numerical experiment of ice and snow buildings under the heating energy strategy is carried out.Combined with the results of numerical experiments,it provides guidance for the indoor environment design of ice and snow buildings.