Regardless of the CHW plant location, an overall campus thermal utility master plan can provide the design options for consideration and evaluation of pumping schemes for circulating CHW. There are two common configurations for CHW plant pumping schemes that will work with the selected CHW equipment to deliver the CHW to a building or group of buildings:
The designer should become aware of the various advantages and disadvantages for either scheme, which include: central plant operators’ familiarity with their different operational modes, different size pump motor requirements, different capital investment requirements for infrastructure, and “low delta T syndrome.
Along with the discussion of pumping schemes, it is important to understand the phenomenon known as low delta T syndrome, and its subsequent impact on chiller plant capacity and energy usage.
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