Air cooled absorption cooling system operable by low grade heat

摘要

An air-cooled absorption refrigerating system and method is provided An evaporated refrigerant is mixed with a weak refrigerant stream Portions of the evaporated refrigerant are absorbed into the weak refrigerant stream via air-cooled absorber means to form a reconstituted solution which is pumped into heater means in heat exchange relationship with a hot weak refrigerant. The hot weak refrigerant stream is conducted therefrom Refrigerant is evaporated from the reconstituted solution via generator means in heat exchange relationship with a heat transfer fluid The generator means stream is separated into a hot weak refrigerant stream and a main refrigerant vapor stream The main refrigerant vapor stream is condensed via air-cooled condenser means The pressure of a condensed refrigerant vapor stream is reduced and conducted into evaporator means, where it is evaporated to form an evaporated refrigerant stream and conducted therefrom.

主权项

1. An air-cooled absorption refrigerating system comprising: a generator in heat exchange relationship with a stream of heat transfer fluid or gas, a separator adapted to separate a stream from said generator into a weak refrigerant solution stream and a main refrigerant vapor stream, an air-cooled condenser to condense said main refrigerant vapor stream, an expansion valve to reduce the pressure of a condensed refrigerant stream from said air-cooled condenser, an evaporator to form an evaporated refrigerant stream from a stream from said expansion valve and to cool a surrounding material, a heat exchanger to exchange heat between said weak refrigerant solution stream and a high-pressure rich refrigerant solution stream, a mixer to produce a mixed stream from said evaporated refrigerant stream from said evaporator and from said weak refrigerant solution stream from said heat exchanger, an air-cooled absorber to reconstitute said mixed stream, and a pump to produce said high-pressure rich refrigerant solution stream from the reconstituted mixed stream from said air-cooled absorber, wherein said heat exchanger is split into a first and a second heat exchange stage; wherein i) the first heat exchange stage exchanges heat between said weak refrigerant solution stream and a stream of high-pressure rich refrigerant solution from said second heat exchanger stare; and ii) the second heat exchange stage exchanges heat between said mixed stream from said mixer and said high-pressure rich refrigerant solution stream from said pump, wherein said air-cooled absorber is adapted to reconstitute said mixed stream obtained from said second heat exchanger stare; and wherein said high-pressure rich refrigerant solution stream from said first heat exchange stage is adapted to be introduced into said generator.