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Continuous Commissioning of a Central Chilled Water & Hot Water System
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A central chilled water / hot water system provides cooling / heating energy from central utility plants to multiple customers (buildings) through campus distribution loops. To effectively transport the chilled water and hot water to the buildings and control the flow, several types of bypass schemes are used, including air handling unit coil bypass, pump bypass, building loop bypass, distribution loop bypass, and central utility plant decoupling. Most of the bypass schemes are designed to provide comfort to each building without regard for the loop pumping requirements. Continuous Commissioning of the building and campus loops is necessary to ensure adequate water flow to each building and reduce the overall pumping energy required for both the campus loops and the building loops. Some optimization of the plant chiller 1 boiler operation is also necessary and beneficial. In general, through Continuous Commissioning, chilled water and hot water loop temperature differences will be improved, leading to reduced chilled water and hot water flow rates. This will save pumping energy and improve chiller/boiler efficiancy.
Deng, S.; Turner, W. D.; Batten, T.; Liu, M. (2000). Continuous Commissioning of a Central Chilled Water & Hot Water System. Energy Systems Laboratory (http://esl.tamu.edu); Texas A&M University (http://www.tamu.edu). Available electronically from