Hanbell RC2-D, Technical Manual

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RC2-D Technical Manual
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7. System Application
7.1 Principle& Application of economizer
RC2-D series compressor is equipped with economizer stop valve as standard. The stop valve can be
rotated and locked with internal and external thread of flange, and can be connected in any direction,
which is convenient for use.
The economizer’s pressure is very close to the intermediate pressure of Hanbell compressor, this
economizer port design can realize no compression backflow loss, so as to ensure that the
compressor can maintain the best operation state in the whole load stage. With these characteristics,
if the screw compressor can be designed to add a system of subcooling circuit or a flash drum for
two-stage expansion to inject gas into the economizer port, it is possible to improve the efficiency.
Especially under the condition of high compression ratio, the power consumption of the compressor
increases very little, which can not only achieves a better energy efficiency ratio, but also improves
the refrigeration capacity, efficiency and reliability of the system.
Please get efficiency of the economizer through hanbell selection program.
7.1.1 Sub-cooled Economizer System
The subcooled economizer system uses a heat exchanger (subcooler) to subcool the liquid refrigerant.
A part of the refrigerant from the condenser is injected into the subcooler, and the throttled
refrigerant will evaporate and absorb heat in the subcooler, so as to achieve the subcooling effect.
The superheated steam enters the compressor through the economizer and mixes with the partially
compressed gas from the evaporator. Because the supercooled liquid is under the condensation
pressure, there is no special requirement for the connecting pipeline between the supercooled liquid
and the evaporator, only the heat insulation is needed. This system is suitable for general application.
图7-1 经济器系统示意图（过冷式）