Power Reduction in Residential Air Conditioning Systems through the Use of Thermal Energy Storage.

摘要

The study report explores the dynamics of operation and the economics of two types of AC/TES systems. These are the chilled water system,designated CWS,and the ice storage system,designated ISS. The design methodology for these two concepts is included in sections IV and V of this report. The theoretical performance of these two designs is compared with the performance of a typical central air conditioning unit,designated TCS,in the summary on the following page. All three units are assumed to serve a typical Austin residence with 1,630square feet of floor space and are subjected to identical design day summer heat loads. Note in the summary of data that the AC/TES system reduces the peak power requirement by as much as 40% and shifts this demand to off-peak hours. The annual energy consumption for the CWS is 22% less than for the TCS,and this results in an annual savings of $306in operating costs,assuming time-of-day rates. A progressive rate structure,such as time-of-day pricing with a 200% premium for peak-hours power,would result in a 3-to 4-year payback period for these storage type cooling systems.