The Heat Recovery Loop (HRL) is used unidirectionally to capture rejected heat from the Chilled Water Loop (CHWL) and transfer it to the hot water loop. The available components that can be used on the heat recovery loop include:
A Heat Recovery Chiller (HRC) is a CHWL water-source chiller providing its condenser heat to a designated heat recovery recipient. This is also commonly referred to as a Heat Pump Chiller. The operating point during the heating season is typically set to meeting the coincident cooling load. Though, the capability for sizing the HRC for to meet desired Hot Water Loop (HWL) target supply water temperature is available. The HRL requires the use of the HRC.
The HARC is a specialized air-to-water heat exchanger component. It is designed to enable Heat Recovery Chillers (HRC) to reclaim or reject heat from the salvaged air resources, like exhaust air from buildings. The HARC’s function is to raise or lower the temperature of water flowing through it, limited only by the entering air and water conditions and the coil’s effectiveness.
For more information seeHeat Acquisition-Rejection Coil.
Its important to note that the CHWL can have either the HRL enabled or the waterside economizer enabled. Both HRL and waterside economizer cannot be enabled on the same CHWL.
