Energy Consumption Analysis For Recent Building Envelope And Study On The Energy-saving Reform In Xinjiang Medical University, Nanhu

With the development of the economy, energy consumption in building is becoming more and more important in nowadays. Energy efficiency has become a popular issue. Energy efficiency is a main way to save energy. Energy consumed for heating is the leading parts of the building energy consumption in Urumqi. It is the key point of energy saving to reduce the heating loading in the buildings.Based on the analysis into the buildings of Xinjiang Medical University and Nanhu Area, we put forward the percentage of different orientation, different wall structure, different insulating material in roof and different types of windows. According to the investigation, base building was defined. We tested the overall heat transfer coefficient of exterior wall and roof in four buildings.Use two methods to calculate the building energy consumption, including Steady-state calculation and computer simulation. Based on the base building model and the heat transfer coefficient of building envelope, the index of heat loss of building was carried out. The proportion of the index of heat loss of every part of envelop was analyzed. To meat the requirement of the thermal comfort, the paper takes the closed balcony as heating room, and calculated the heat consumption indicator of the base building again. Compared the index of heat loss of base building and energy efficiency building in Urumqi, the base building was not an energy-saving building. The heating load of base building was simulated by DeST-h. We simulated the based temperature of the base building with DeST-h. According to the result of based temperature, the room on the top floor in the northwest has the worst thermal environment.Introduce the efficiency reform ways of ceiling, exterior wall and window, especially the methods in Xinjiang. There are six types of different envelope combination in the 59 buildings. Six buildings'index of heat loss was calculated with DeST-h. The paper made single factor analysis about the influence of ceiling, exterior wall and window to the building heat load; we put out the relationship between the size of the EPS and the building heat load. We simulated the index of heat loss of the energy reformed buildings. According to result, we find there is a huge potential in energy saving, about 66.55%.Through research, testing and simulation, the energy consumption in existing building in Urumqi was analyzed. The potential of the energy saving in base building was also discussed. Two energy-saving reform programs are given in the paper. It is useful to reduce the heating load by the program. The other existing buildings may reformed through the same way.