印第安娜南部大学的中心工厂目前服务于超过300英亩的18个校园建筑。中央工厂为各个建筑的空气处理器生产和循环冷冻水。该系统包括一级冷却泵、二级循环泵，用于输送整个校园的流量，以及每个校园建筑中的三级泵。冷冻水系统由五台冷却器、一个冷冻水储水箱和一个板框式热交换器组成，可在室外空气温度足够低时使用。总容量为6500吨冷却水。在过去的40年里，不同的工程公司多次将该系统添加到系统中，每个公司都实施了不同的系统考虑。多年来，系统中增加了建筑物和装置，暖通空调操作员离开，雇佣了新的操作员，导致了一些低效的做法。 物理设备经理要求对操作员进行更新培训，并对系统进行分析，以降低能源费用。本文讨论了与冷冻水供应相关的节能方法:纠正冷冻水箱的不当使用，开发冷却器分段的图形方法，以及识别系统条件，这些条件将导致用于控制二次循环泵的差压变送器的负读数。系统分析的一部分是作为高年级热科学课程的一部分进行的，这一部分也在讨论中。已经证明，对操作员进行暖通空调系统培训可以提高系统运行的能效。引文:伊利诺伊州芝加哥ASHRAE会议论文

The central plant at the University of Southern Indiana currently serves 18 campus buildings over 300 acres. The central plant produces and circulates chilled water for air handlers at the individual buildings. The system includes primary chiller pumps, secondary circulation pumps to deliver flow throughout the campus and tertiary pumps in each campus building. The chilled water system consists of five chillers, a chilled waterstorage tank and a plate and frame heat exchanger that can be used when the outdoor air temperatures are low enough. The total capacity is 6500 tons of cooling.The system has been added to numerous times over the past 40 years, by different engineering firms, each implementing different system considerations. Through the years, buildings and units have been added to the system, and HVAC operators have left and new ones have been hired, resulting in some inefficient practices. The physical plant manager initiated a request for updated training of the operators and analysis of the system to reduce energy expenses.This paper discusses methods of energy savings that relate to the chilled water supply: a correction of improper use of the chilled water tank, the development of a graphical method for chiller staging, and the identification of system conditions that will result in negative readings from the differential pressure transmitter that is used to control the secondary circulation pumps. Part of the system analysis was done as part of a seniorlevel thermal science class, which is also discussed. It has been demonstrated that HVAC system training for the operators can result in increased energy-efficiency in system operation.