Chapter hvac engineering Fundamentals: Part 1 Introduction

10.17.7
Condenser heat recovery
Reclamation of condenser heat is very common for reheat control in
the cooling cycle, particularly where high airflow rates and / or humid-
ity control is involved. Several methods are available.
The simplest method is to make the return (hot) condensing water
available directly to the reheat coils (Fig. 10.35). If an open-circuit
cooling tower is used, there will be problems with fouling in the coils.
A closed-circuit tower should be used.
A double-bundle shell-and-tube condenser can be used, as shown in
Fig. 10.36. The reheat loop functions continuously but may not use
enough heat to satisfy the refrigeration cycle. The loop to the cooling
tower is controlled to be used as required to make up the difference.
Equipment: Part 2
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