公共建筑供冷期直燃机耗气量确定方法

Method for Determining Gas Consumption of Direct-fired Chiller during Cooling Period of Public Buildings

为评价公共建筑供冷期直燃机(直燃型溴化锂吸收式冷水机组)耗气量的合理性,分别采用软件法(采用DeST软件)、概算法(采用GB/T 51161—2016《民用建筑能耗标准》推荐的公共建筑非供暖能耗指标的约束值、引导值与建筑供冷面积进行计算)对北京某办公楼供冷期直燃机耗气量进行模拟、概算。对采用典型年室外温度模拟供冷期直燃机耗气量的可信性进行分析。将模拟结果、概算结果分别与实际计量结果进行比较,分析两种方法的准确性。软件法的模拟结果与实际计量结果更接近,准确度更高。采用典型年室外温度模拟的供冷期直燃机耗气量与采用实测室外温度的模拟结果以及实际计量结果均非常接近,说明采用典型年室外温度的模拟结果可信。

In order to evaluate the rationality of gas consumption of direct-fired chiller(direct-fired lithium bromide absorption chiller)during the cooling period of public buildings,the software method(using DeST software)and the probabilistic algorithm(The constraint value and guide value of non-heating energy consumption indexes for public buildings recommended by Standard for Energy Consumption of Building(GB/T 51161-2016)and the cooling area of the building are used for calculation)are used to simulate and estimate the gas consumption of direct-fired chiller during the cooling period of an office building in Beijing.The credibility of using typical annual outdoor temperature to simulate the gas consumption of direct-fired chiller during the cooling period is analyzed.The simulation results and the estimated results are compared with the actual measurement results to analyze the accuracy of the two methods.The simulation result of the software method is closer to the actual measurement result,and the accuracy is higher.The gas consumption of the direct-fired chiller during the cooling period simulated by using the typical annual outdoor temperature is very close to the simulation results using the measured outdoor temperature and the actual measurement results,indicating that the simulation results using the typical annual outdoor temperature are credible.