Research On Experiment And Simulation Of Indoor Thermal Environment At Low Temperature And Energy Consumption Monitoring And Analysis

Energy is the basic driving force of the global development and world economic growth, providing material security for human survival and development. The growth of energy use efficiency and population in the process of energy production and consumption prompts the increase the amount of energy consumption which affects the progress of industrialization and urbanization of each country. With the development of the global economy, the energy situation is so grim that the energy-saving voice is rising dramatically; in the meanwhile governments have to develop energy policy and implement it in succession. Building energy consumption is an important part of the total energy consumption of goods in the whole society, accounting for about1/3, which has huge potential of energy conservation, consequently the work of energy conservation should focus on building energy consumption.In order to study indoor thermal and humid environmental variation in the low-temperature state, a closed room with envelope structure of the polyurethane outer insulation material is designed and constructed as the experimental platform which concludes refrigeration equipment, heating source, temperature and humidity sensors, intelligent control system, wireless receiver system and so on. This paper focuses on the impact of the location of the heating source, the quantity of the heating source and weather refreeze during the experiment on the indoor thermal environment of the building in the low-temperature state. According to the experimental results:in the low-temperature condition, thermal stratification phenomenon of indoor air is special obvious, and the temperature increases linearly with the increasing height, and the relative humidity before the temperature rises is with the upper part of high and the lower part of low while on the contrary after heating of the heating up. Heating source power is not proportional to the size of temperature rise per hour, and the correction factor of0.95is obtained from the experiment. In the closed low-temperature room, when the two heat sources of900W have been opened for30minutes, then the closed room will be refreezing, consequently, the increase of the height of heating source will make the final temperature of the measuring points increase and the relative humidity dumps. Indoor thermal environment parameters were collected through experiments to provide the basis for the parameters input of LES model, which breaks the air movement-building energy co-mode based on the complete mix of indoor air. The key parameters for a regional model given the solution was provided by CFD in coupling simulation, making the reliability of numerical simulation increased for indoor environment and building energy. The CFD simulation results show that changing the direction of the heat radiation of the heat source has little effect on the indoor temperature field; when the two heating sources distributed symmetrically is in a heated state, the updraft generated by the effect of thermal buoyancy is mutually disturbed and there are vortexes in the upper space of the closed room.With the Pengyuan energy-saving office in Hefei as the object of study, it conducts a detailed comparative analysis on simulated energy consumption and the actual monitoring energy consumption within heating period, then a discussion on energy saving potential of the general public buildings with the same energy characteristics is elicited from the operation of actual energy consumption of the office building. The total energy consumption of the general public buildings to a large extent is determined by the building energy consumption of air conditioning and lighting. The actual air-conditioning energy consumption of Pengyuan energy-saving office building within heating season meet the standard of the passive building in Germany. By simulating the natural light of the office building with Ecotect modeling, what could be discovered is that the interior light environment of the office building is improved differently when using lighting board and the light guide tube respectively to reduce interior lighting energy consumption. In particular, the use of the light guide tube greatly improves indoor light environment and reduces interior lighting energy consumption. Therefore, making full use of natural light in the lighting system can significantly reduce lighting energy consumption. At the same time it puts forward that behavior of energy-saving has played a pivotal role in energy conservation of energy efficiency of the general public building. Accordingly, enterprises are encouraged to integrate energy efficiency into the corporate culture and pay attention to enhance energy conservation awareness of employee.