INTERMITTENT ABSORPTION REFRIGERATION SYSTEM EQUIPPED WITH A WASTE ENERGY STORAGE UNIT

摘要

A solar powered intermittent absorption refrigeration system utilizes helical coil heat exchangers for generation, absorption, dephlegmation, condensation and heat recovery. The thermo-siphon effect is used to supply and reject heat from the system, to recover and utilize heat from a waste energy unit, to reject heat of absorption, and to pressurize and depressurize the system. The system produces ice blocks during the nighttime without any requirement of electrical energy for the operation of the system.

主权项

1: A method for intermittent absorption refrigeration, comprising:
pressurizing a generator/absorber unit by permitting a first portion of a first fluid having temperature T1H to flow out of a waste energy storage unit and into a first heat exchanger comprised in the generator/absorber unit while permitting a second portion of the first fluid having temperature T1C to flow out of the first heat exchanger and into the waste energy storage unit, wherein T1H>T1C, such that the first and second portions of the first fluid flow due to a first difference in densities between them; pressurizing the generator/absorber unit by permitting a first portion of a second fluid having temperature T2H to flow out of a second heat exchanger and into the first heat exchanger while permitting a second portion of the second fluid having temperature T2C to flow out of the first heat exchanger and into the second heat exchanger, wherein T2H>T2C, such that the first and second portions of the second fluid flow due to a second difference in densities between them; generating a first refrigerant vapor from a strong absorbent-refrigerant solution in the generator/absorber unit by permitting a third portion of the second fluid having temperature T3H to flow out of the second heat exchanger and into the first heat exchanger while permitting a fourth portion of the second fluid having temperature T3C to flow out of the first heat exchanger and into the second heat exchanger, wherein T3H>T3C, such that the third and fourth portions of the second fluid flow due to a third difference in densities between them; condensing the first refrigerant vapor into a liquid refrigerant in a condenser and permitting the liquid refrigerant to flow out of the condenser and into a refrigerant vessel; depressurizing the generator/absorber unit by permitting a third portion of the first fluid having temperature T4H to flow out of the first heat exchanger and into the waste energy storage unit while permitting a fourth portion of the first fluid having temperature T4C to flow out of the waste energy storage unit and into the first heat exchanger, wherein T4H>T4C, such that the third and fourth portions of the first fluid flow due to a difference in densities between them; storing a fifth portion of the first fluid in the waste energy storage unit, wherein thermal insulation reduces heat transfer out of the fifth portion of the first fluid; depressurizing the generator/absorber unit by permitting a first portion of a weak absorbent-refrigerant solution having temperature TAH to flow out of the generator/absorber unit and into a third heat exchanger while permitting a second portion of the weak absorbent-refrigerant solution having temperature TAC to flow out of the third heat exchanger and into the generator/absorber unit, wherein TAH>TAC, such that the first and second portions of the absorbent flow due to a difference in densities between them; cooling the evaporation unit by permitting the liquid refrigerant in the refrigerant vessel to evaporate into a second refrigerant vapor; and permitting the second refrigerant vapor to flow into the generator/absorber unit.