Kruse (1991) discusses the use of condenser water for reheating:
A[nother heat recovery] ... system is a low-temperature chilled water (brine) system which uses its condenser water for re-heat purposes. A make-up air unit will normally have brine coils and reheat coils. This can also be true for dual purpose units. Normally the brine is supplied by a chiller whose condenser water is cooled by a cooling tower. At the same time, the re-heat coil is fed from a boiler. Frequently, the boiler and tower can be eliminated from this portion of the building system. (Don't throw them away. Simply make them smaller.) By using a local, water cooled chiller somewhere at the project site, the condenser water can be piped to the re-heat coil instead of to a cooling tower. Again, depending on the design requirements of the air handler, there may be a need for simultaneous cooling and re-heating for de-humidification purposes. A psychometric analysis will easily verify the feasibility and predict the savings. Knowing the energy consuming nature of make-up air units, the savings can be considerable.
