Figure 9 Installation Of Heat Recovery System - Hertz HDD Series Instruction Manual

OPTIONAL COOLING SYSTEM
a- Heating the Environments:
The simplest way of heat recovery in oil or fluid cooled screw-type compressors is using the cooling air
heated by the compressor directly. In this process, the hot air is transferred to the places to be heated
through an air duct system.
b- Heating the Utility Water:
It is possible to obtain hot water from the air cooled screw-type compressors by adding a heat exchanger to
the oil circuit. For this purpose, heat exchanger plates or safe heat exchangers are used. Such a use might
vary depending on the purpose for which the water is to be used (e.g. heating, bathing, washing or use in
production and cleaning processes).
The following should be taken into account with regard to the use of exchangers in heat recovered systems:
•
Exchanger should always be installed vertically.
•
The fluid inlets on the exchanger should have opposite directions.
•
In order to avoid pollution of the exchanger, filters that would stop particles larger than 1 mm should
be installed on the cold water inlet of the compressor.
•
In case the cooling performance of the exchanger drops, it should be cleaned by circulation of
inflammable cleaning materials (detergent or weak acid) in the opposite direction of the normal flow.
The exchanger can be removed for this operation if necessary. The exchanger must be rinsed with
water after cleaning.

Figure 9 Installation of Heat Recovery System

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