Simulation and Dynamic Characteristics of Discharging Process of Storage Tank Used in Conventional Air-Conditioning

Abstract:

Mathematical model of heat transfer process of a latent heat thermal storage tank was established, dynamic performance and melting process of cool storage tank were simulated by the apparent heat capacity method. the relation of melting rate along with time and cold thermal energy released along with time were obtained. The results show that no appreciable change in the total cold thermal energy released is observed for the increase of flow rate, whereas improvement on total cold thermal energy released due to the increase of inlet temperature is detectable. At the cool discharge condition, the best inlet temperature of storage tank is at 12°C-13°C.

• Periodical: Advanced Materials Research (Volumes 383-390)
• Pages: 2974-2977
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.383-390.2974
• Online since: November 2011
• Authors: Xiao Yan Li, Yan Yan Wu, Zhi Fen Cen
• Keywords: Air-Conditioning, Discharging Process, Phase Change Materials (PCM), Storage Tank

References

[1] W. Saman, F. Bruno, and E. Halawa, Thermal performance of PCM thermal storage unit for a roof integrated solar heating system., Solar Energy, vol. 78, 2005, p.341–349.

DOI: 10.1016/j.solener.2004.08.017

[2] Roy S K and Sengupta S, The melting process within spherical enclosures, Journal of Heat Transfer, vol. 109, 1987, pp.460-462.

DOI: 10.1115/1.3248104

[3] Hirata T, Makino Y and Kaneko Y, Analysis of close contact melting for octadecane and ice inside isothermally heated horizontal rectangular capsule , Int. J. Heat Mass Transfer, vol. 34, 1991, pp.3097-3106.

DOI: 10.1016/0017-9310(91)90079-t

[4] Webb B W , Moallemi M K and Viskanta R., Experiments of melting unfixed ice in a horizontal cylindrical capsule, Journal of Heat Transfer, vol. 109, 1987, pp.454-459.

DOI: 10.1115/1.3248103

[5] X. Y. Li and Z. L. Ma, Study on thermal performance of PCM for air-conditioning and infection of ambulatory melting problem in sphere, Acta Energiae Solaris Sinica, vol. 28, 2007, p.892–896.

[6] J. Bedecarrats, F. Strub, and F. Balcon, Phase Change Thermal Energy Storage Using Spherical Capsules: Performance of a Test Plant, International Journal of Refrigeration, vol. 19, 1996, p.187–196.

DOI: 10.1016/0140-7007(95)00080-1

[7] J. Wang, Simulation of Operating Processes for Encapsulated Ice Storage Equipment, Proceeding of 7th Int. Thermal Storage Conference: Japan, 1996, pp.333-338.

[8] M. David, D. Ibrahim, Thermal modeling of a packed bed thermal energy storage system during charging, Applied Thermal Engineering, vol. 29, 2009, p.187–196.

DOI: 10.1016/j.applthermaleng.2008.03.041

[9] Wenzhen Chen, Yunxuan Hao, Guanghua Li and Xuewen Gui. Experimental Study of Contact Melting Inside Horizontal Rectangular Capsule, Journal of Naval University of Engineering., vol. 14, 2002, pp.1-4.

[10] Xiaoyan Li., Research on Cold-storage Characteristics of New High Temperature Phase-change Materials in Cold Storage Ball, Energy Conservation Technology, vol. 22, 2004, pp.9-11.