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Analysis of COP thermodynamic cycle LBAC with two-level absorption when obtaining negative temperatures of cooling

DOI: 10.21047/1606-4313-2016-15-1-86-92
UDC 621.574.013.-932.2

Analysis of COP thermodynamic cycle LBAC with two-level absorption when obtaining negative temperatures of cooling

Stepanov K.I., Mukhin D. G., Volkova O.V., Aleksandr V. Baranenko

Abstract
Lithium bromide absorption chillers (LBAC) are intended for cooling water and other liquids up to a temperatures not lower than 3 ÷ 5 оC. This is due to the fact that upon deeper cooling the possibility of refrigerant (water) freezing. Furthermore COP of LBAC are also reduced.Nevertheless, in LBAC, goal of the generation of cooling up to more lower temperature with the RES utilizing is very attractive. In this paper the principal scheme of LBAC generating with the negative-temperature cooling are proposed. A method for evaluating the COP of the LBAC with double stage absorption has been suggested. It is shown that the value of COP of the single-effect LBAC with two-stage absorption is varied from 0.367 to 0.407 depending on the boundary conditions: temperatures of heat source and freezing liquid.

Keywords: lithium bromideabsorption chiller (LBAC), energy saving,lithium bromide, double-stage absorption, COP.

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