Research On Energy Efficiency Standards Under The Existing Residential Building Energy-related Issues

Since the implementation of Wuhan city circle of low energy consumptionresidential building design standard, the indoor heat environment and the energyconsumption of building have been obviously improved in Hubei province residentialbuilding. With the development of society, the state requirement to building energy isever increasing, the new energy saving standard has been promulgated in my provincein2013, which is the low energy consumption of residential building energy-savingdesign standard, the standard proposes target to achieve sixty-five percent energy-savingof residential building, the rate of the envelope energy efficiency is32.5%.This paper selects the residential building of Wuhan city in my province asresearch object, first of all, use the DeST-h software to analysis the influence factors toenergy consumption of residential building. The analysis results show that, themaximum thickness of the exterior wall thermal insulation material (EPS) can not bemore than60mm in my province existing residential building, when the thickness of theexterior wall thermal insulation material (EPS) is more than60mm, the energy-savingrate of the residential building does not vary with the heat transfer coefficient, besides, itwill increase the initial investment cost (cost of EPS board); the effect of the insulationeffect of the envelope structure to air conditioning energy consumption is small, toheating energy consumption is large; the optimal area ratio of window to wall on southwall is0.3, the optimal area ratio of window to wall on north wall is0.2; when the shapecoefficient of building S is less than0.4, S increases by0.01, the increase rate of theresidential building air condition, heating energy consumption is0.6%-2.08%,0.72%-2.11%.At the same time, two contrast laboratories were established in Wuhan,respectively carrying on contrast experiments in summer and winter within2014. Theexperimental results show that, when we set the air conditioning parameter of twolaboratories at18℃in winter, the average energy saving between energy-savinglaboratory and the other laboratory was26.46%; when we set the air conditioningparameter of two laboratories at26℃in summer, the average energy saving betweenenergy-saving laboratory and the other laboratory was7.3%. By comparing the interiortemperature and inner and outer wall temperature of containment structures, the analysis result show that, exterior walls using internal insulation technology and windows usinghollow glass have a significant effect to improve indoor thermal comfort, reducebuilding energy consumption and improve the efficiency of heating or air conditioningequipment.Energy consumption of two laboratories were simulated in summer and winterusing the DeST-h software. By calculating and comparing the simulated energy-savingrate to experimental energy-saving rate, the results show that, the average differencerate in winter is11.73%, while in summer is10.33%, which verifying the correctnessand reliability of the DeST-h software in energy consumption simulation.