Comparison of Two District Cooling Systems Utilizing Cold Energy of Liquefied Natural Gas
This paper focuses on feasibility and economic efficiency of a hypothetical DCS utilizing cold energy from gasification of LNG. Two flow processes and systems are designed for the utilization. In scheme I, LNG cold energy is used to produce ice, and then ice is transported to the central cooling plant of DCS, where chilled water is produced and finally delivered to separate buildings and facilities to satisfy the cooling demand of consumers. In scheme II, water is used as the cold storage medium to absorb cold energy from LNG. Return water from DCS is chilled by LNG cold energy, and the chilled water is then sent back to the central plant. The following processes are similar to scheme I. The efficiency of each process is evaluated, and emphasis is placed on heat transportation loss in the system, which is considered as the main negative impact in DCS. Comparisons of these two systems are made in different conditions. The results show that DCS utilizing cold energy of LNG is feasible and valuable. As conditions especially the cooling supply distance change, each of the two systems has its own advantages.
District cooling system (DCS) Liquefied natural gas (LNG) Cold energy utilization
Tao Wang Wensheng Lin Anzhong Gu
Institute of Refrigeration and Cryogenics,Shanghai Jiao Tong University,Shanghai 200240,China
国际会议
The 6th International Symposium on Heating,Ventilating and Air Conditioning(第六届国际暖通空调学术会议)
南京
英文
1712-1718
2009-11-06（万方平台首次上网日期，不代表论文的发表时间）