Development and Engineering Design of Technology for Utilization of Liquefied Natural Gas (LNG) Cold Energy in Ice-Making

Abstract:

A process of using LNG cold energy for ice-making was proposed, the process consisted of three parts: LNG vaporization system, the refrigerant circulation system and ice-making system. And LNG cold energy was delivered to ice-maker by refrigerant. Through design and optimization, the optimum temperature was confirmed in the ice-making process, the benefit of power saving was calculated, and the efficiency of energy utilization was analyzed by exergy analysis method. The research results showed that the average ice quantity was 1.59t/h with vaporization amount of 1000kg/h LNG. Taking ethylene glycol aqueous solution as refrigerant, when its temperature changed from-15°C to-6°C, the energy efficiency was higher with 18°C temperature difference. And the benefit of electricity saving was 112 kW and the efficiency of cold exergy was 5.52%. The process can be designed into skid-mounted, which can flexibly operate between different LNG vaporization stations.

• Periodical: Advanced Materials Research (Volumes 805-806)
• Pages: 519-525
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.805-806.519
• Online since: September 2013
• Authors: Hui Zhang, Wen Dong Xu, Yun Long Teng, Cheng Ming An
• Keywords: Cold Energy Utilization, Exergy, Ice-Making, LNG, Skid-Mounted

References

[1] Wendong Xu, Haijun Bian, Shuanshi Fan and Ben Hua: Natural Gas Industry (2009) No. 5, pp.112-114. (In Chinese).

[2] J. Szargut and I. Szczygiel: Energy Vol. 34 (2009) No. 7, pp.827-837.

[3] S.B. Liang and Y.C. Hao: Advanced Powder Technology Vol. 11 (2000) No. 2, pp.187-197.

[4] R. Singh, M. Mochizuki, K. Mashiko and T. Nguyen: Energy Vol. 36 (2011) No. 5, pp.2802-2811.

[5] Daoping Liu: HVAC Engineering (1995) No. 4, pp.30-33. (In Chinese).

[6] T. Mizoue, Y. Takasaki, Y. Tani, S. Urabe, E. Asada, Y. Cobuchi and K. Doi: Desalination, Vol. 38 (1981) No. 11, p.583.

DOI: 10.1016/s0011-9164(00)86101-9

[7] A. Ong'iro, V.I. Ugursal, A.M. Al Taweel, G. Lajeunesse: Applied Thermal Engineering Vol. 16 (1996) No. 3, pp.263-271.

DOI: 10.1016/1359-4311(95)00071-2

[8] B. Liu, X.M. Yang, W.L. Song and W.G. Lin: Chemical Engineering Science Vol. 71 (2012) No. 3 , pp.375-391.

[9] E. Querol, B. Gonzalez-Regueral, A. Ramos, J.L. Perez-Benedito: Energy Vol. 38(2011) No. 2, pp.964-974.

DOI: 10.1016/j.energy.2010.12.013

[10] The fourth design chemical industry: Cryogenic Manual (Fuel Chemical Industry Press, China 1973). (In Chinese).

[11] Dongliang Zhong, Daoping Liu and Zhimin Wu: Refrigeration and air-conditioning Vol. 7 (2007 ) No. 3, pp.5-9. (In Chinese).

[12] Q.S. Fu: The thermodynamic analysis method of energy system (Xi'an Jiaotong University Press, China 2005). (In Chinese).