Energy recovery from LNG regasification for space cooling-technical and economic feasibility study for Singapore

Abstract

This paper investigates three scenarios for (LNG) Liquefied natural gas driven district cooling grids in terms of technological and economic feasibility. The scenarios consist of commercial, residential, and low temperature industrial cooling and their combinations. These scenarios achieve tremendous energy savings in comparison with conventional mechanical cooling. The free cooling potential in Singapore is calculated to Singapore Dollars (SGD) 800.75 million p.a. depending on the scenario, based on a regasification heat demand of 1009 kJ/kg of LNG with current terminal capacity of 3.5 Million Tonnes per annum (MTPA). In addition to the economic benefit, there is also an environmental benefit of 655.57 Million kg of CO2 e/a (CO2 equivalent) through Greenhouse gas (GHG) emissions reduction by free cooling utilization. The terminal's capacity has increased to 6 MTPA by the end of 2014.