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Presents distance-learning module focusing on variable refrigerant volume (VRV)/variable refrigerant flow (VRF) systems. Explains what they are, compares capital, running and maintenance costs with other types of system, discusses selection of equipment from manufacturers' literature and looks at the new technology introduced. Supplies sources of further information. Illustrates in schematics typical cooling/heating/heat recovery modes for VRV/VRF systems, a refrigerant circuit of simultaneous cooling/heating, a typical building application for these systems and a two-pipe heating/cooling system arrangement.

Primary Author(s): Welch T

Source: Bldg. Serv. J. CIBSE, May 2002, vol.24, no.5, 85-88, 4 figs.

             BSRIA Abstract Doc 000103646 Abs 20020680

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