We study the phenomenon of absorption refrigeration, where refrigeration is achieved by heating instead work, in two different setups: a minimal set up based on coupled qubits, and non-linearly resonators. Considering ZZ interaction between we outline basic ingredients required to achieve cooling. Using local as well global master equations, observe that inclusion XX type term qubit-qubit coupl...

The engineering calculation and simulation of absorption refrigeration systems require the availability of simple and efficient functions for the determination of thermodynamic property values of the operating fluid. This work presents a set of five simple and explicit functions for the determination of the vapor - liquid equilibrium properties of the ammonia-water mixture. The functions are co...

The Jet Propulsion Lthoratory (JPL) has been involved in cryogenic refrigeration development for the National Aeronautics and Space AdminisUation (NASA) since 1979. Witi the help of NASA, Southern California Gas Company, Ford Automotive, and Aerojet General, we have spun off Ma technology for cmnmerciai air conditioning since 1990. In all, JPL has fabricated and successfully tested the followin...

Refrigerants that are used in refrigeration systems, cause environmental difficulties such as depletion of ozone layer and greenhouse effect. Thus, we must find substitutes for such refrigerants, in this paper, the effect of refrigerant on the thermodynamics performance of refrigeration cycles are studied. To do this, a refrigerator that has designed for R12, is simulated. Results show that pur...

Refrigerants that are used in refrigeration systems, cause environmental difficulties such as depletion of ozone layer and greenhouse effect. Thus, we must find substitutes for such refrigerants, in this paper, the effect of refrigerant on the thermodynamics performance of refrigeration cycles are studied. To do this, a refrigerator that has designed for R12, is simulated. Results show that pur...

This paper deals with a lumped-parameter dynamic simulation of a single-effect LiBr-H2O absorption chiller. In many studies the thermodynamic properties of LiBr-H2O solution were taken from some approximate relations causing the results to be somewhat inaccurate. These relations were used to solve simultaneous differential equations involving the continuity of species constituting the LiBr-H2O ...