High efficient sorption cycles using CaO/H{sub 2}O and LiBr/H{sub 2}O for gas cooling

Conference · Thu Jul 01 04:00:00 EDT 1999

OSTI ID:20030598

Cerkvenik, B; Satzger, P; Ziegler, F; Poredos, A

In this paper three-stage cascading sorption cycles are proposed, consisting of a bottoming double-effect machine working with LiBr/water and a topping solid-gas machine working with CaO/water. A cooling COP as high as 1.8 is expected, which presents improvement of about 25% compared to industrial double-effect LiBr/H{sub 2}O chillers. The power density of the topping cycle is crucial for the total system economics and depends on the heat and mass transfer mainly during the chemical reaction. For a better understanding of the chemical process and the transport mechanisms, measurements on a small scale solid sorption experimental device have been made. The heat transfer has been intensified with the use of a graphite matrix. For studying the mass transfer, measurements with different structures of a graphite matrix with CaO have been conducted.

• Research Organization: Univ. of Ljubljana (DE)
• OSTI ID: 20030598
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
ABSORPTION REFRIGERATION CYCLE
AQUEOUS SOLUTIONS
BOTTOMING CYCLES
CALCIUM OXIDES
ENERGY EFFICIENCY
HEAT TRANSFER
LITHIUM BROMIDES
MASS TRANSFER
TOPPING CYCLES