UNCORRECTED PROOF Development of type 2 solution transportation absorption system for utilizing LNG cold energy Young Kyong Jo, Jin-Kyeong Kim 1 , Soon Geul Lee, Yong Tae Kang * School of Mechanical and Industrial System Engineering, Kyung Hee University, Yong In, Gyeong-gi 449-701, South Korea Received 10 October 2006; received in revised form 12 January 2007; accepted 15 January 2007 Abstract The objective of this paper is to develop a new energy transport system for district cooling application by using type 2 absorption cycle. Cold energy from the LNG storage system is utilized as the cooling source of the condenser and the rectifier. The pressures of the system, UAs of the evaporator and the desorber, the inlet temperatures of the refrigerant for each compo- nent, transportation distance and the pumping power per unit length are considered as the key parameters. The results show that UA of the evaporator has more dominant effect on COP than that of the desorber. The optimum system pressure for the demand side is also determined. For the present system, it is recommended that the refrigerant inlet temperature of the evaporator be lower than 4.3  C for long distance transportation. It is concluded that the cold energy from the LNG storage system can be effectively applied to the long distance transportation system for district cooling application with the type 2 absorption cycle. The maximum transportation distance and the pumping power per unit length are calculated. The optimum operation conditions are also predicted from the parametric analysis. Ó 2007 Elsevier Ltd and IIR. All rights reserved. Keywords: Type 2 absorption cycle; LNG cold energy; Long distance energy transportation system; Solution transportation absorption system; District cooling application 1. Introduction In order to solve the problem of exhausting fossil fuel, there are many attempts to utilize the waste energy more effectively. In the present study, LNG cold energy which is mostly wasted is applied to the district cooling system. In Korea, LNG plant was constructed in 1983 and the first LNG storage tank was introduced in 1986. Since then, the * Corresponding author. Tel.: /fax: þ82 31 201 2990. E-mail addresses: jkkim@unr.edu (J.-K. Kim), ytkang@khu. ac.kr (Y.T. Kang). 1 Current address: Mechanical Engineering Department (Mail Stop 312), University of Nevada, Reno, NV 89557, USA. 0140-7007/$35.00 Ó 2007 Elsevier Ltd and IIR. All rights reserved. doi:10.1016/j.ijrefrig.2007.01.010 ARTICLE IN PRESS International Journal of Refrigeration xx (2007) 1e8 www.elsevier.com/locate/ijrefrig 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 JIJR1284_proof  21 February 2007  1/8 Please cite this article in press as: Young Kyong Jo et al., Development of type 2 solution transportation absorption system for utilizing LNG cold energy, Int. J. Refrigeration (2007), doi:10.1016/j.ijrefrig.2007.01.010