公共建筑节能改造节能量修正计算方法

针对当前公共建筑节能改造节能量确定方法尚不完善的现状,提出了一种新的节能量修正计算方法,即以改造前建筑为基准的节能量修正模型,包括4个修正系数和3个计算式,4个修正系数分别为气象修正系数、室内热环境修正系数、内部负荷修正系数和运行时间修正系数,3个计算式为采暖节能量计算、空调节能量计算和总节能量计算。以天津市某大型办公建筑节能改造项目为例,采用节能量修正模型,得到修正节能量,此节能量保证了比较条件的一致性。通过比较修正节能量与改造前后能耗直接相减的节能量,修正节能量计算方法引起10.23%的节能量差别,从而证明了修正的必要性。通过与模拟软件计算结果的对比,差别为3.03%,在10%的可接受范围内,验证了该节能量修正计算方法的准确性。

An Energy Conservation Correction Method for Energy Efficiency Retrofit of Public Buildings

There exists imperfections of the methods for energy conservation verification of the energy efficiency retrofit projects. A new energy conservation verification method was developed by creating energy conversion correction model and four correction coefficients and three calculation formulas were involved, The four correction coefficients were outdoor weather correction coefficient, indoor environmental correction coefficient, internal load correction coefficient and performance period correction coefficient. The three calculation formulas were heating energy conversion calculation, air-conditioning energy conversion calculation and total energy conversion calculation. The energy conversion correction model was adopted to analysis the energy conservation of an office building located in Tianjin to demonstrate the reliability of the correction model and the feasibility of the verification method, and the corrected energy conversion based on consistent conditions before and after retrofit was obtained. 10.23% difference between the corrected energy conversion and the direct energy conversion exists indicating that the correction energy conversion is necessary. The energy conservation difference of 3.03% the calculation result of energy simulation software verified the accuracy of the new verification method.