Thermodynamic Analysis of a Novel Thermal Driven Refrigeration System
Commenced in January 2007
Frequency: Monthly
Edition: International
Paper Count: 32919
Thermodynamic Analysis of a Novel Thermal Driven Refrigeration System

Authors: Linghui Zhu, Junjie Gu


Thermal-driven refrigeration systems have attracted increasing research and development interest in recent years. These systems do not cause ozone depletion and can reduce demand on electricity. The main objective of this work is to perform theoretical analyses of a thermal-driven refrigeration system using a new sorbent-sorptive pair as the working pair. The active component of sorbent is sodium thiocyanate (NaSCN). Ammonia (NH3) is chosen as sorptive. Based on the thermodynamic properties of the working solution, a mathematical model is introduced to analyze the system characteristics and performance. The results are used to compare with other thermal-driven refrigeration systems. It is shown that the advantages provided by this system over other absorption units include lower generator and evaporator temperatures, a higher coefficient of performance (COP). The COP is about 10 percent higher than the ones for the NH3-H2O system working at the same conditions.

Keywords: Absorption; Ammonia-Sodium thiocyanate, Exergy, coefficient of performance (COP)

Digital Object Identifier (DOI):

Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 1774


[1] Zhu L.H, Fundamental and experimental investigation of a double mechanism sorptive refrigeration (DMSR) system, the Master-s thesis, Carleton University, 2006.
[2] Wang S.G. and Wang R.Z., Recent development of refrigeration technology in fishing vessels, Renewable Energy, Vol. 30, pp. 589-600, 2005.
[3] G. C. Blytas, F. Daniels, Concentrated solutions of NaSCN in liquid ammonia: solubility, density, vapor pressure, viscocity, thermal conductance, heat of solution, and heat capacity, Journal of the American chemical society, Vol. 84, pp. 1075-1083, 1962.
[4] S. L. Sargent, W. A. Beckman, Theoretical performance of an ammonia-sodium thiocyanate intermittent absorption refrigeration cycle. Solar Energy, Vol. 12, pp. 137-146, 1968.
[5] K. P. Tyagi, Ammonia-salts vapour absorption refrigeration systems. Heat Recovery Systems, Vol. 4, pp. 427-431, 1984.
[6] M. K. Aggarawal, R. S. Aggarawal and Y. V. S. R. Sastry, Solid absorbents for solar-powered refrigeration systems, Energy, Vol. 34, pp. 423-426, 1985.
[7] C. A. Infante Ferreira, Thermodynamic and physical property data equations for ammonia-lithium nitrate and ammonia-sodium thiocyanate solutions, Solar Energy, Vol. 32, pp. 231-236, 1984.
[8] P. Bourseau, R. Bugarel, Refrigeration par cycle a absorption-diffusion: comparaison des performances des systemes NH3-H2O et NH3-NaSCN. International journal of refrigeration, Vol. 9, pp. 206-214, 1986.
[9] Da-wen Sun, Comparison of the performances of NH3-H2O, NH3-LiNO3 and NH3-NaSCN absorption refrigeration systems, Energy conversion management, Vol. 39, pp. 357-368, 1998.
[10] Szargut J, Morris DR, Steward FR. Exergy analysis of thermal, chemical and metallurgical processes. New York, Hemisphere Publishing Corporation; 1988
[11] Kotas TJ. The exergy method of thermal plant analysis. Florida: Krieger Publishing Company; 1995
[12] ASHRAE. ASHRAE Handbook, fundamentals, Chapter 17. ASHRAE: Atlanta, GA, 1993; 17.45, 17.81.
[13] Zhu LH, Wang SJ and Gu JJ. Performance investigation of a thermal-driven refrigeration system. International Journal of Energy Research 2008; 32: 939-949.
[14] Properties of R-717 (anhydrous ammonia), Industrial refrigeration consortium, University of Wisconsin, Madison, WI, USA.