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0 reviews• Changes in the system resistance as valves close
• Reduction in the pump efficiency as the system characteristics change
• Variable speed drive losses.
Capital cost saving opportunities are likely to arise from the potential diversity of load during pipe and pump sizing. Constant flow heating and chilled water systems are generally well understood by designers and commissioning specialists. The commissioning procedure involves setting up systems to achieve fixed flow rate parameters. Most of the valves used for commissioning are manually adjusted during commissioning, and three-port valves are used to modulate flow rate and hence heat transfer across coils.