Abstract
This paper presents case studies of two moderately sized ammonia refrigeration systems retrofitted for floating head pressure control. It also presents a parametric analysis to assist in selecting appropriate pressures in an ammonia refrigeration plant, based on a model incorporating manufacturer's published compressor efficiency and evaporative condenser capacity and energy use as it varies with outdoor wetbulb temperature. It concludes with a simple control strategy for effectively retrofitting existing systems at low cost.
Barrer, P. J.; Jones, S. M. (1998). Energy Savings from Floating Head Pressure in Ammonia Refrigeration Systems. Energy Systems Laboratory (http://esl.tamu.edu). Available electronically from
https : / /hdl .handle .net /1969 .1 /91140.