Water-lithium bromide double-effect absorption cooling analysis
A numerical model was developed for the transient simulation of the double-effect, water-lithium bromide absorption cooling machine, and the use of the model to determine the effect of the various design and input variables on the absorption unit performance. The performance parameters considered were coefficient of performance and cooling capacity. The sensitivity analysis was performed by selecting a nominal condition and determining performance sensitivity for each variable with others held constant. The variables considered in the study include source hot water, cooling water, and chilled water temperatures; source hot water, cooling water, and chilled water flow rates; solution circulation rate; heat exchanger areas; pressure drop between evaporator and absorber; solution pump characteristics; and refrigerant flow control methods. The performance sensitivity study indicated in particular that the distribution of heat exchanger area among the various (seven) heat exchange components is a very-important design consideration. Moreover, it indicated that the method of flow control of the first effect refrigerant vapor through the second effect is a critical design feature when absorption units operate over a significant range of cooling capacity. The model was used to predict the performance of the Trane absorption unit with fairly good accuracy.
- Research Organization:
- Texas Univ., Austin (USA). Center for Energy Studies
- DOE Contract Number:
- AC03-79SF10540
- OSTI ID:
- 6727822
- Report Number(s):
- DOE/SF/10540-T1
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
15 GEOTHERMAL ENERGY
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
ABSORPTION REFRIGERATION CYCLE
PERFORMANCE
COMPUTER CODES
L CODES
COOLING SYSTEMS
AIR CONDITIONERS
DESIGN
FLOW RATE
HEAT EXCHANGERS
LITHIUM BROMIDES
MATHEMATICAL MODELS
SENSITIVITY ANALYSIS
SIMULATION
ALKALI METAL COMPOUNDS
BROMIDES
BROMINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
LITHIUM COMPOUNDS
LITHIUM HALIDES
Geothermal Legacy
140901* - Solar Thermal Utilization- Space Heating & Cooling
151000 - Geothermal Energy- Direct Energy Utilization
320304 - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Waste Heat Recovery & Utilization