Captive Energy's Water Chillers with Heat Recovery are designed to simultaneously meet a building's cooling and heating loads. Advanced semi-hermetic compact screw compressors are used and operate on the refrigerant vapour compression cycle of R134A. These units remove heat from a water source and transfer it to a space heating water loop or to potable water with water temperatures up to 140°F. The water chillers are equipped with a single evaporator hydraulically connected to the cooling load. Dual water-cooled condensers are provided, one for heat recovery and a second to reject any excess heat to a separate cooling loop. In comparison, a conventional water chiller has a single condenser and rejects all of the waste heat through the cooling loop. A building's cooling loop typically rejects heat to ambient air through a rooftop cooling tower. By capturing this waste heat, the need for additional heat supplied by burning fossil fuels in a boiler can be eliminated.
The units can operate primarily as either a water chiller or as a heat recovery unit. The operator is able to change the current operating mode at any time to best suit the current demands. When operating as a water chiller the cooling load will be satisfied and heat recovery occurs without any additional power consumption. The amount of heat recovered is suitable for preheating water or satisfying a small heating load. The full heating load will be satisfied when operating as a Heat Recovery unit. Some additional compressor power is typically required however the savings in fossil fuel costs more than offset the cost of the additional electrical power to run the compressor.
For parts and service, we’ve partnered with Control Temp Inc., one of the industry’s most respected HVAC contractors.
Since 1984, Chilliwack’s IMW Industries has been a manufacturer of compressed natural gas (CNG) systems used globally to fuel vehicles as well as supply natural gas for industrial users. IMW systems offset more than one million tonnes of GHG annually, and ongoing production will increase offsets by another400,000 tonnes each year. In Canada, IMW equipment is used in transit bus fleets in Vancouver, BC and Hamilton, ON as well as many fleet and public CNG stations.