The Influences of the Refrigerant Adulteration by an Absorbent on the Cooling Capacity and COP of the Absorption Chiller

흡수식 냉동기에서 흡수액이 증발기로 혼입시 냉각용량과 성능계수에 미치는 영향

  • Park, Chan-Woo (Department of Computer Based Applied Mechanical Engineering, Iksan National College)
  • 박찬우 (국립익산대학 컴퓨터응용기계과)
  • Published : 2006.09.01

Abstract

The purpose of the present work is to investigate the influence of the refrigerant adulteration by LiBr solution on the cooling capacity and COP for three different types of abso게tion chillers: a single-effect type, a series-flow double-effect type and a parallel-flow with double-effect type. A simulation program has been prepared for the cyclic analysis of absorption chillers. With some assumptions, the calculations have been performed by solving the mass balance equation, energy balance equation and the state equation simultaneously. The range of the LiBr concentration of refrigerant was 0% to 20% in the present study. For the single-effect absorption chiller, the maximum decrease in the cooling capacity was 10% at the 20% of LiBr concentration. For the double-effect chiller, the capacity was decreased by 11.1% for the parallel-flow type and the series-flow type. Also, the COP was reduced by 3.0% in single-effect, 2.8% in series-flow type (SR=0.4) and 2.3% in parallel-flow type.

Keywords

References

  1. McNeely, L. A., 1979, Thermodynamic properties of aqueous solution of lithium bromide, ASHRAE Transactions, Vol. 85, pp. 413-434
  2. Gershon, G., 1982, Adiabatic absorption and desorption for improvement of temperatureboosting absorption heat pump, ASHRAE Transactions, Vol. 88, Pt. 2, pp.359-367
  3. Gommed, K. and Gershon, G., 1990, Performance analysis of staged absorption heat pump; Water-lithium bromide systems, ASHRAE Transactions, Vol. 96, Pt. 1, pp.1590-1598
  4. Hans, H. and Gershon, G., 1996, Improved property data correlations of absorption fluids for computer simulation of heat pump cycles, ASHRAE Transactions, Vol. 102, Pt. 1, pp.980-997
  5. Ryu, J. S., 1996, Application of absorption chillers, Korean association of air conditioning, refrigerating and sanitary engineers