Ammonia-water triple-effect absorption cycle

Conference · Mon Jan 01 04:00:00 EST 1990

OSTI ID:5313826

DeVault, R C; Marsala, J ^[1]

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1. Oak Ridge National Lab., TN (USA)

There are a number of known absorption cycles capable of triple-effect'' refrigeration. Among the basic triple-effect cycles only one particular cycle is able to use ammonia-water (NH{sub 3}/H{sub 2}O) as the absorption fluid pair. This cycle uses two condensers and two absorbers to achieve the triple effect.'' This paper presents several basic triple-effect cycles superimposed on NH{sub 3}/H{sub 2}O pressure-temperature-concentration equilibrium diagrams (PTX) showing that only one particular cycle can use NH{sub 3}/H{sub 2}O. Calculations are presented showing the relative performance of a conventional double-effect cycle using NH{sub 3}/H{sub 2}O and the performance of this triple-effect cycle using NH{sub 3}/H{sub 2}O on a comparable basis. The triple-effect cycle is predicted to have 18% higher cooling efficiency (COP = 1.41 compared to COP = 1.2 for a double-effect), lower pressure (701 psi instead of 1000 psi), significantly reduced pumping power (less than one half that of the double-effect cycle), and potentially lower construction cost (33% less total heat exchange needed). Practical implications for this triple-effect cycle are discussed. 15 refs., 9 figs., 1 tab.

• Research Organization: Oak Ridge National Lab., TN (USA)
• Sponsoring Organization: DOE/CE
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 5313826
• Report Number(s): CONF-900203-2; ON: DE90002713
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320106* -- Energy Conservation
Consumption
& Utilization-- Building Equipment-- (1987-)
320303 -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Equipment & Processes
ABSORPTION REFRIGERATION CYCLE
AMMONIA
COOLING SYSTEMS
EFFICIENCY
ENERGY SYSTEMS
ENERGY TRANSFER
HEAT TRANSFER
HYDRIDES
HYDROGEN COMPOUNDS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
OXYGEN COMPOUNDS
PERFORMANCE
REFRIGERATORS
WATER