系统仿真模型的目标是复制真实系统在天气和负载的所有运行条件下的性能；给出温度、流量、冷负荷、所有设备的功率需求，以及天气和运行条件变化时的总现场功率。本文的仿真模型由一组符合热力学定律的联立方程组组成，包括电厂设备和空气侧设备的非线性性能特征，并估计系统中建筑物的性能特征。 这组方程总是在稳态条件发生变化后达到设备能量平衡，就像真实系统的响应一样。本文旨在展示系统仿真建模作为系统设计和系统能量控制的工具。引文:伊利诺伊州芝加哥ASHRAE Transactions第118卷第1部分

The objective of a system simulation model is to duplicate the performance of a real system at all operating conditions of weather and load; giving temperatures, flows, cooling loads, kW demand of all equipment, and total site kW as weather and operational conditions change. The simulation model of this paper consists of a set of simultaneous equations that obey the laws of thermodynamics and includes the non linear performance characteristics of the plant equipment and air side equipment, and estimates the performance characteristics of the buildings in the system. The set of equations always arrives at equipment energy equilibrium after a change in the steady state condition, just as a real system would respond. The purpose of this paper is to demonstrate system simulation modeling as a tool for system designs and system energy control.