Thermodynamic properties of lithium bromide/water solution with application to an absorption temperature boosting heat pump

Thesis/Dissertation · Tue Jan 01 04:00:00 EST 1985

OSTI ID:5836384

Herold, K E

This investigation concerns the thermodynamic properties of LiBr/H/sub 2/O solutions relevant to absorption chillers and heat pumps. At the outset of the present study, efforts to quantify the thermodynamic performance of adsorption cycles were hindered by a lack of consistent enthalpy and entropy data on the absorption pair, LiBr/H/sub 2/O. Accordingly, the principal objective of this investigation is the generation of an analytic Gibbs free energy expression for LiBr/H/sub 2/O from which accurate values of thermodynamic properties can be readily calculated. The Gibbs free energy expression involves 37 constants and accurately reproduces density, specific heat, and vapor pressure values as well as enthalpy and entropy values. The versatility of the Gibbs free energy expression in calculating consistent and accurate thermodynamic properties over the entire range of the independent variables relevant to adsorption system analysis makes it a significant new tool in the analysis of absorption systems. The Gibbs free energy expression is utilized to calculate the thermodynamic property values required for first and second law analyses of the components of an innovative absorption cycle known as a temperature boosting heat pump cycle. These analyses provide both a quantitative evaluation of the sources of irreversibility and a refined understanding of the practical potential of the cycle.

• Research Organization: Ohio State Univ., Columbus (USA)
• OSTI ID: 5836384
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320100* -- Energy Conservation
Consumption
& Utilization-- Buildings
ALKALI METAL COMPOUNDS
BROMIDES
BROMINE COMPOUNDS
ENERGY
FLUIDS
FREE ENTHALPY
HALIDES
HALOGEN COMPOUNDS
HEAT PUMPS
HYDROGEN COMPOUNDS
LITHIUM BROMIDES
LITHIUM COMPOUNDS
LITHIUM HALIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
REFRIGERATORS
THERMODYNAMIC PROPERTIES
WATER
WORKING FLUIDS