近年来，一些发展需要改进方法，以准确预测建筑供暖和制冷的负荷曲线和能源需求:这些发展包括现代建筑和施工实践、用于控制建筑环境的能源数量增加、总能源系统的使用，以及使用计算机进行系统控制。ASHRAE正在赞助一个分两阶段的项目。在第一阶段，选择了四栋建筑进行广泛研究。其中一栋建筑位于俄亥俄州立大学校园内，是这项工作中使用的建筑。在第一阶段，将对环境控制系统进行模拟，以便通过系统以及锅炉和蒸发器盘管等特定设备追踪建筑物上的热负荷。通过使用建议的负荷计算技术，结合系统模拟和实测天气数据，可以每15分钟计算一次建筑物所有区域的瞬时热负荷或冷负荷，并确定系统的响应。 系统应响应负载，以便负载和系统之间始终保持能量平衡。这反过来将允许确定系统能量需求。这项工作的目的是开发用于系统仿真的算法和计算机程序。引文:巴哈马拿骚ASHRAE Transactions第78卷第2部分

In recent years, a number of developments have evolved which require improved methods for accurately predicting load profiles and energy requirements for the heating and cooling of buildings: Among these developments are modern architectural and construction practices, the increased number of energy sources used for controlling building environments, use of total energy systems, and use of computers for system control.ASHRAE is sponsoring a two-phase program. In Phase I, four buildings were chosen for extensive study. One of these buildings is located on The Ohio State University campus and is the building which was used in this effort. Under Phase I, the environmental control system was to be simulated in order that the heat load on the building could be traced through the system and through specific pieces of equipment such as the boiler and the evaporator coils. By using the proposed load calculation technique in conjunction with the system simulation and measured weather data, the instantaneous heating or cooling loads to all zones of the building could be calculated every 15 min and the response of the system could be determined. The system should respond to the load so that there is always an energy balance between the load and the system. This in turn would allow the system energy requirements to be determined. The purpose of this effort is to develop the algorithms and computer programs for system simulation.