A computer model for simulation of absorption systems in flexible and modular form

Technical Report · Thu Aug 01 00:00:00 EDT 1991

DOI:https://doi.org/10.2172/5242145· OSTI ID:5242145

Grossman, G; Gommed, K; Gadoth, D

A computer code in a flexible and modular form developed for simulation of absorption systems makes 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. The equations are linked by a main program according to the user's specifications to form the complete system. The equations are solved simultaneously, and fluid properties are taken from a property data base. The code is user oriented and requires a relatively simple input containing the given operating conditions and the working fluid at each state point. The user conveys to the computer an image of his or her cycle by specifying the different subunits and their interconnection. Based on this information, the program calculates (1) the temperature, flow rate, concentration, pressure, and vapor fraction at each state point in the system and (2) the heat duty at each unit, from which the coefficient of performance may be determined. The program has been used successfully to simulate a variety of single-stage, double-stage, and dual-loop heat pumps and heat transformers, with the working fluids LiBr-H{sup 2}O,H{sub 2}O-NH{sub 3}, LiBr/H{sub 2}O-NH{sub 3}, LiBr/ZnBr{sub 2}-CH{sub 3}OH, and more. 23 refs., 10 figs., 13 tabs.

• 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; USDOE, Washington, DC (United States)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 5242145
• Report Number(s): ORNL/Sub-90-89673; ON: DE92000384
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
36 MATERIALS SCIENCE
ABSORPTION REFRIGERATION CYCLE
COMPUTER CODES
COMPUTERIZED SIMULATION
HEAT PUMPS
AMMONIA
FLOW RATE
HEAT EXCHANGERS
HEAT TRANSFER
LITHIUM BROMIDES
METHANOL
MIXTURES
TEMPERATURE DEPENDENCE
WATER
WORKING FLUIDS
ZINC BROMIDES
ALCOHOLS
ALKALI METAL COMPOUNDS
BROMIDES
BROMINE COMPOUNDS
DISPERSIONS
ENERGY TRANSFER
FLUIDS
HALIDES
HALOGEN COMPOUNDS
HYDRIDES
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
LITHIUM COMPOUNDS
LITHIUM HALIDES
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
SIMULATION
ZINC COMPOUNDS
ZINC HALIDES
320106* - Energy Conservation
Consumption
& Utilization- Building Equipment- (1987-)
990200 - Mathematics & Computers
360603 - Materials- Properties