Generator absorber heat exchanger for an ammonia/water absorption refrigeration system
AssigneeRobur S.P.A.
InventorsDale A. Fuesting, William E. Stephan, Richard H. Merrick
Life of this patent
Estimating the term…
Abstract
An absorption chiller having a generator absorber heat exchanger with a split device for directing a first portion of strong solution from the absorber to the generator at a first temperature, while simultaneously directing a second portion of strong solution from the absorber to the generator at a second temperature. The absorption chiller operates to transfer weak solution from the generator to the absorber at a temperature of about 265.degree. F., while transferring strong solution from the absorber to the generator at two different temperatures--preferably about 210.degree. F. and about 240.degree. F.
Claims12
An absorption machine having a single heat transfer loop and requiring only one heat transfer solution, said absorption machine comprising:
- (a) a generator, a condenser, an evaporator and an absorber;
- (b) a refrigerant pathway operatively connecting the generator to the condenser, the condenser to the evaporator, and the evaporator to the absorber;
- (c) a weak solution pathway from the generator to the absorber;
- (d) a strong solution pathway from the absorber to the generator;
- and
- (e) a generator/absorber heat exchanger simultaneously disposed in the strong solution pathway and the weak solution pathway;
- wherein said strong solution pathway includes a first subpathway and a second subpathway, wherein the first subpathway directs strong solution to said generator at a first temperature and concentration, while the second subpathway directs strong solution to said generator at a second temperature and concentration;
- and further wherein said weak solution pathway routes weak solution through a first absorption step in said generator/absorber to a second absorption step in said absorber with substantially all of the weak solution that passes through said first absorption step being routed to said second absorption step.
A method for improving the efficiency of an absorption machine, said absorption machine having a generator, a condenser, an evaporator and an absorber;
- said absorption machine further having a refrigerant pathway operatively connecting the generator to the condenser, the condenser to the evaporator, and the evaporator to the absorber;
- and said absorption machine further having a weak solution pathway from the generator to the absorber and a strong solution pathway from the absorber to the generator;
- said method comprising simultaneously including in the strong solution pathway and the weak solution pathway a generator absorber heat-exchanger, wherein said generator absorber heat-exchanger includes a splitting means to pass at least a portion of strong solution through the upper absorber/generator heat exchanger until that portion of the strong solution has been partially vaporized and heated to a temperature of about 240.degree. F., and thereafter routing the two-phase strong solution to the generator.
A generator/absorber heat exchanger, comprising:
- (a) an upper absorber/generator heat exchanger with:
- (i) a first drip tray disposed near the top of the upper absorber/generator heat exchanger to cascade weak solution through the upper absorber/generator heat exchanger;
- and
- (ii) a first coil to pass strong solution through the upper absorber/generator heat exchanger in a heat exchange relationship with the showering weak solution;
- (b) a lower absorber heat exchanger with:
- (i) a second drip tray disposed near the top of the lower absorber heat exchanger to shower weak solution through the lower absorber heat exchanger;
- and
- (ii) a second coil to pass strong solution through the lower absorber heat exchanger in a heat exchange relationship with the showering weak solution;
- (c) means for splitting the flow of strong solution so that a first portion of strong solution passes through the lower absorber heat exchanger and the upper absorber/generator heat exchanger until that portion of the strong solution is two-phased at a temperature of about 240.degree. F., while a second portion of strong solution passes through the lower absorber heat exchanger reaching its boiling point temperature of about 210.degree. F. but remaining in a substantially liquid state.
Dependencies are inferred from the claim text.