Causal Model for Peak and Off Peak Waste Heat Recovery for Chilled Water Production

The objective of this study is to develop a causal model for estimating the amount of chilled water that can be produced from generated waste heat during off peak period of a district cooling plant. The methodology adopted is to calculate the amount of waste heat generated by the gas turbines of the plant during peak and off peak operations. Ten months of 2009 historical data of waste heat generated during peak and off peak periods were analyzed. The chilled water produced by absorption cooling for the ten months during peak period was also analyzed. Based on the findings the waste heat during off peak if converted to chilled water using absorption process will lead to economic benefits as well as reduced emission to atmosphere. Further detail study will be undertaken to enhance the model and to establish the design configuration of the system to recover the off peak waste heat for chilled water production by absorption process.