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Description> Thermal Pump 1 2
At present, heating and
refrigerating system of industrial enterprises and civil facilities
are using a large number of water spray attemper and reducer device
to reduce pressure and temperature of the steam as that to satisfy
demands of thermal equipments and thermal users. Viewed from point
of first law of energetics, attemper and reducer device loses no
energy, input energy equal to output energy. While viewed from point
of second law, it is causing great irreversible loss. Functional
ability of the steam decreases largely after attempering and reducing,
that is, the value of steam decreases. But steam spray thermal pump
is quite on the contrary. It can not only reclaim low-grade steam
discharged in vain but also drive spray of steam by right of high
pressure, absorb low-pressure steam or condensed steam and increase
pressure in mixture to improve its parameter, so as to satisfy requirements
of production process, heating and refrigerating.
2¡¢Operational Principle of Steam Spray Thermal
Pump
Operational principle of steam spray thermal
pump is using high pressure to drive spray of steam, pump low-pressure
steam or condensed steam and improve its parameters to the level
needed by the user. We call this kind of device as steam spray thermal
pump. Its operational principle is similar to those of steam ejector
and water ejector. This kind of thermal pump doesn¡¯t have any moving
parts. It has simple structure, reliable operation and can be adjusted
automatically. As shown in Chart 1, steam spray thermal pump consists
of part parts of nozzle¢Ù, absorbing room¢Ú, blending room¢Û, pressure
increasing room¢Ü. Passing through the nozzle driven by high pressure,
the steam is insulated and expanded, pressure reducing from PO to
Pp£¨Pp is lower than pressure Ph of sprayed steam£©. Due to effect
of differential pressure, sprayed low-pressure steam or condensed
steam are pump into absorbing room, two flows of steam mixed in
blending room and get a pressure of P3. After pressure increasing
in the pipe, it reaches pressure Pg needed by the customers.
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