Hydraulic system components should be determined early in the design of a heating, ventilation or air conditioning system, regardless of capacity range or type of occupancy:1. Heating or cooling central utility plant.2. System type.3. System distribution.4. Design standardization.While the components are similar, the integration of each into large projects can present special challenges. For any complex facility, a central utility plant acts as the cooling and heating generation source while the system distribution plan serves as the skeleton of the building.Water distribution systems type There are typically two major pumping configurations applied heating and chilled water distribution systems: primary-only and conventional primary-secondary. Over the past 20 years, there have been numerous industry publications examining constant primary flow and variable-secondary systems versus variable-primary systems.
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