Advanced sorption chillers for gas cooling

Conference · Fri Nov 01 04:00:00 EST 1996

OSTI ID:392536

Satzger, P; Ziegler, F; Alefeld, G ^[1]; Stitou, D; Spinner, B ^[2]

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1. ZAE Bayern, Garching (Germany)
2. CNRS-IMP, Perpignan (France). Lab. Europeen Associe

The power demand peak caused by compression climatization may be reduced by using direct-fired sorption chillers. Commercial absorption chillers reach a coefficient of performance (COP) of about 1.2, which often is not high enough to compete with compression chillers. Using high-temperature driving heat, the COP of absorption chillers can be improved by multistaging. But at high temperatures, currently used working pairs tend to cause heavy corrosion of the construction materials. Solid sorption systems as high-temperature topping cycles can avoid these problems. In a French-German cooperation a cascading triple-effect system is being realized, consisting of a bottoming double-effect machine working with LiBr/water and a topping solid-reaction machine working with NiCl{sub 2}/ammonia. A COP of 1.35 is expected in this experiment, equivalent to an improvement of about 13% compared to the industrial standard. The solid-reaction topping cycle also can be realized as a two-reaction system. Then a COP of 1.55 can be expected, which means a 28% improvement. Even quadruple-effect operation is possible with a COP of 1.8. Several possible cycle configurations are discussed in this paper. The advantages and problems of the envisaged combined cycles are presented and the principle design of the experiment is outlined.

• OSTI ID: 392536
• Report Number(s): CONF-960254--
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
ABSORPTION REFRIGERATION CYCLE
AMMONIA
COMBINED CYCLES
COMPARATIVE EVALUATIONS
GAS HEAT PUMPS
LITHIUM BROMIDES
MIXTURES
NICKEL CHLORIDES
PERFORMANCE
WORKING FLUIDS