Seven-effect absorption refrigeration

Claim 1

A multi-effect absorption refrigeration apparatus comprising: a low absorption circuit means for absorption cooling at a low temperature range, said low circuit means including a low generator, a low condenser, a low evaporator, a low absorber, and a low solution pair; a medium absorption circuit means for absorption cooling at a medium temperature range, said medium circuit means including a medium generator, a medium condenser, a medium evaporator, a medium absorber, and a medium solution pair, said medium temperature range being such that operation temperatures of both said medium condenser and said medium absorber are higher than an operating temperature of said low generator; a high absorption circuit means for absorption cooling at a high temperature range, said high circuit means including a high generator, a high condenser, a high evaporator, a high absorber, and a high solution pair, said high temperature range being such that operation temperatures of both said high condenser and said high absorber are higher than an operating temperature of said medium generator; a first heat exchanger means for heating said low generator with rejected heat from said medium condenser and said medium absorber; and a second heat exchanger means for heating said medium generator with rejected heat from said high condenser and said high absorber.

Claim 6

A method for multi-effect absorption refrigeration comprising the steps of: operating a low absorption circuit at a low temperature range, the low absorption circuit including a low generator, a low condenser, a low evaporator, a low absorber, and a low solution pair; operating a medium absorption circuit at a medium temperature range, the medium absorption circuit including a medium generator, a medium condenser, a medium evaporator, a medium absorber, and a medium solution pair, the medium absorption circuit operating step being such that operation temperatures of the medium condenser and the medium absorber are higher than an operating temperature of the low generator; Operating a high absorption circuit at a high temperature range, the high absorption circuit including a high generator, a high condenser, a high evaporator, a high absorber, and a high solution pair, the high absorption circuit operating step being such that operation temperatures of the high condenser and the high absorber are higher than an operating temperature of the medium generator; heating the low generator with rejected heat from the medium condenser and the medium absorber; and heating the medium generator with rejected heat from the high condenser and the high absorber.

Claim 7

A method for multi-effect absorption refrigeration comprising the steps of: operating a low absorption circuit at a low temperature range, the low absorption circuit including a low generator, a low condenser, a low evaporator, a low absorber, and a low solution pair; operating a medium absorption circuit at a medium temperature range, the medium absorption circuit including a medium generator, a medium condenser, a medium evaporator, a medium absorber, and a medium solution pair, the medium absorption circuit operating step being such that operation temperatures of the medium condenser and the medium absorber are higher than an operating temperature of the low generator; Operating a high absorption circuit at a high temperature range, the high absorption circuit including a high generator, a high condenser, a high evaporator, a high absorber, and a high solution pair, the high absorption circuit operating step being such that operation temperatures of the high condenser and the high absorber are higher than an operating temperature of the medium generator; heating the low generator with rejected heat from the medium condenser and the medium absorber; and heating the medium generator with rejected heat from the high condenser and the high absorber.