吸收式制冷机典型特性DOE-2模型的修正及其应用

A Modifi ed DOE-2 Model for Typical Performance of Absorption Chillers and its Application

在冷热电等多功能联产子系统中,溴化锂吸收式制冷机是常用的供冷设备,DOE-2关于冷源特性模拟的经验模型是分析其典型变工况特性的解析方法之一。分析了吸收式制冷机特性DOE-2模型的适用范围。为扩展吸收式制冷机特性DOE-2模型的适用范围,以双效蒸汽型溴化锂吸收式制冷机为例,对DOE-2模型中的能量消耗特性引入冷媒水温度变化的修正,给出一个DOE-2模型的修正式,经与实际数据和理论模型对比证明其合理有效。在能源动力系统中的应用案例表明,修正的DOE模型可用于快速分析吸收式制冷机定水流量时的典型变工况特性,对故障诊断、性能预测等具有理论意义,也便于工程上初步进行系统优化配置和经济运行。

LiBr-water absorption chillers are commonly adopted in multifunction energy systems. The empirical part-load performance model for chillers presented by DOE-2 is one of the analytical methods to solve chiller performances. In this study, the applicability of the DOE-2 model for absorption chillers was analyzed. A modified DOE-2 model for double effect steam-driven absorption chillers, as an example, was developed and its reasonability and validity were tested by the product data and the general theoretical model. Application case study confirms the ability of the modified DOE-2 model to fast predict the part-load performances of absorption chillers.