Abstract:
In this paper, a district cooling system is designed to utilize cold energy releasing from liquefied natural gas (LNG) regasification process as cold source. Aspen Plus code is employed to simulate the usable amount cold energy of a real LNG receiving terminal in the design condition. For the air conditioning system of data center with natural cold providing cooling and the office, the cold energy supply, investment and system operational energy consumption for ten district cooling schemes with different pipeline transmission distances are calculated. Comparing with the distributed electrical refrigerating system, the economic feasibility for these ten schemes is analyzed. The results show that when the pipeline transmission distance is less than 20 km, the district cooling system using LNG cold energy as cold resources consumes less energy as well as releases less CO
2, which has a certain environmental benefits. When the pipeline transmission distance is 6 km, the investment payback period for office building or data center with natural cold providing cooling would be 1.77 years or 0.43 years respectively. When the pipeline transmission distance is 16 km, the investment payback period would be 12.86 years and 3.15 years.