双级溴化锂制冷循环中间压力优化计算数学模型  

Optimum Mathematical Model for Calculating Intermediate Pressure in Two stage LiBr Refrigerating Cycle

作　　者：何嘉鹏[1] 王东方[1] 王克金[2] 

机构地区：[1]南京建筑工程学院城市建设系,南京210009 [2]重庆大学数学系,重庆400045

出　　处：《南京理工大学学报》1999年第4期353-356,共4页Journal of Nanjing University of Science and Technology

基　　金：江苏省社会发展基金

摘　　要：该文分析了双级溴化锂制冷循环传统的热力计算方法与不足，提出了一个全新的通过计算双级溴化锂制冷循环中间压力来确定热力循环的方法。并提出了中间压力计算的数学模型，即ｐｍ ＝ ｐ０·ｐｋ ＋ Δｐ。通过计算机模拟计算，分别分析了热源温度、冷却水温度和冷媒水温度对Δｐ 的影响。以获得最大制冷循环热力系数为目标函数，通过优化方法确定影响Δｐ 各因素的加权系数，并获得了双级溴化锂制冷循环中间压力优化计算数学模型。简化和优化双级溴化锂制冷循环热力计算，使其获得最高热力系数。Through the analysis of traditional thermodynamic calculation method and its inadequacy,a new method through calculating intermediate pressure of two stage LiBr refrigeration cycle to determine thermodynamic cycle is advanced.And a calculation model of intermediate pressure,p m =p 0·p k + Δ p,is introduced.The influence of heat source temperature,cooling water temperature and cool media water temperature on  Δ p is separately analyzed through computer simulated calculation.The weighted coefficients that have effect of the factors on  Δ p are determined through an optimum method,and an optimum model for calculating intermediate pressure in two state LiBr refrigerating cycle is proposed.The calculation method of optimum intermediate pressure is proposed.As a result,the thermodynamic calculation of two stage LiBr refrigerating cycle may be simplified and optimized.Then,this cycle could derive the highest heat ratio.

关 键 词：制冷循环 优化 数学模型 中间压力 溴化锂 

分 类 号：TB616[一般工业技术—制冷工程]