Quantitative Study of the Viability of Greywater Heat Recovery (GWHR): GWHR Implemented in Barracks and Dining Facilities.

摘要

This quantitative study examined the economic viability of using greywater heat recovery (GWHR) systems for barracks, and dining facilities on Army installations. Both training (open bay type) and '1 + 1' type barracks were studied independently due to their con-figuration differences. This study discusses the technology theory, installation, and expected costs and savings. Theoretical analysis is done using a variety of thermal effectiveness and savings data from independent studies, assumed water usage levels for barracks and dining facilities, and actual fuel cost data. The analytical study determined that it was economically viable, in most cases, to install GWHR systems in training barracks and in dining facilities. In almost every case, both facility types would have short payback periods and have correspondingly high savings to investment ratios. Results for a '1 + 1' barracks configuration show GWHR viability only with high energy costs and a high number of floors. Finally, this study will provide a decision tool regarding the installation of GWHR systems for barracks and dining facilities based on various energy costs and size of facility.