Thermodynamic design data for absorption heat pump systems operating on ammonia-lithium nitrate-part one. Cooling

✍ Scribed by R. Best; L. Porras; F.A. Holland

• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 611 KB
• Volume: 11
• Category: Article
• ISSN: 0890-4332
• DOI: 10.1016/0890-4332(91)90187-9

✦ Synopsis

The free choice of operating temperatures in absorption systems is limited by the Gibbs phase rule and the thermodynamic properties of the working pair. Tables of possible combinations of operating temperatures and concentrations, including flow ratios, Carnot coefficients of performance and enthalpybased cocflicients of performance have been presented for ammonia-lithium nitrate absorption systems for cooling. The interactions of operating temperatures have been illustrated graphically.

NOMENCLATURE

(COP) coefficient of performance (dimensionless) (FR) flow ratio (dimensionless) /4 enthalpy per unit mass [kJ kg-~ ] M mass flow rate [kg s-1 ] P pressure [bar] Q heat load [kW] T temperature [°C] X weight [%] Subscripts Ab absorber ACI actual for cooling Am ammonia CCI Carnot for cooling Co condenser ECI enthalpy for cooling Ev evaporator Ge generator H heating S solution