Enhanced absorption cycle computer model. Final report

Technical Report · Wed Sep 01 00:00:00 EDT 1993

DOI:https://doi.org/10.2172/10191717· OSTI ID:10191717

Grossman, G; Wilk, M ^[1]

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1. Technion-Israel Inst. of Tech., Haifa (Israel). Faculty of Mechanical Engineering

Absorption heat pumps have received renewed and increasing attention in the past two decades. The rising cost of electricity has made the particular features of this heat-powered cycle attractive for both residential and industrial applications. Solar-powered absorption chillers, gas-fired domestic heat pumps, and waste-heat-powered industrial temperatures boosters are a few of the applications recently subjected to intensive research and development. The absorption heat pump research community has begun to search for both advanced cycles in various multistage configurations and new working fluid combinations with potential for enhanced performance and reliability. The development of working absorptions systems has created a need for reliable and effective system simulations. A computer code has been developed for simulation of absorption systems at steady state in a flexible and modular form, making it possible to investigate various cycle configurations with different working fluids. The code is based on unit subroutines containing the governing equations for the system`s components and property subroutines containing thermodynamic properties of the working fluids. The user conveys to the computer an image of his cycle by specifying the different subunits and their interconnections. Based on this information, the program calculates the temperature, flow rate, concentration, pressure, and vapor fraction at each state point in the system, and the heat duty at each unit, from which the coefficient of performance (COP) may be determined. This report describes the code and its operation, including improvements introduced into the present version. Simulation results are described for LiBr-H{sub 2}O triple-effect cycles, LiCl-H{sub 2}O solar-powered open absorption cycles, and NH{sub 3}-H{sub 2}O single-effect and generator-absorber heat exchange cycles. An appendix contains the User`s Manual.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Technion-Israel Inst. of Tech., Haifa (Israel). Faculty of Mechanical Engineering
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 10191717
• Report Number(s): ORNL/Sub-91-SH641/1; ON: DE94001997; TRN: AHC29313%%9
• Resource Relation: Other Information: PBD: Sep 1993
• Country of Publication: United States
• Language: English

Related Subjects

99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
14 SOLAR ENERGY
ABSORPTION REFRIGERATION CYCLE
COMPUTERIZED SIMULATION
HEAT PUMPS
RESIDENTIAL SECTOR
INDUSTRY
REFRIGERATING MACHINERY
SOLAR-ASSISTED HEAT PUMPS
WORKING FLUIDS
THERMODYNAMIC PROPERTIES
COEFFICIENT OF PERFORMANCE
COMPUTER CALCULATIONS
OPERATION
LITHIUM BROMIDES
LITHIUM CHLORIDES
AMMONIA
HEAT EXCHANGERS
MANUALS
COMPUTER CODES
PROGRESS REPORT
990200
320106
320203
140901
MATHEMATICS AND COMPUTERS
BUILDING EQUIPMENT
LAND AND ROADWAY
SPACE HEATING AND COOLING