Design and Research of Composite System of LNG Cold Energy and Warm Seawater Waste Heat Utilization——Taking the Application of Green Building in an LNG Receiving Station as an Example
To make full use of the existing cooling and heating resources,optimize the energy structure of buildings,and build a green energy demonstration station,this paper,with the cooling and heating project of an LNG receiving station building as the subject,designed a composite system of LNG cold energy and warm seawater waste heat utilization.This system can realize summer cooling and winter heating for the building in front of the plant,and the benefits were analyzed from the perspective of economic and environmental protection.The LNG cold energy utilization system is equipped with a photovoltaic power generation system,featuring near-zero energy consumption,and it can save 698,000 yuan in annual costs.The annual value of a seawater source heat pump calculated by the cost annual value method is 1.149 million yuan,which is 204 thousand yuan lower than that of gas boilers.From the perspective of environmental protection,compared with conventional cooling and heating methods,the carbon emission of the composite system is 659 tons of carbon dioxide equivalent lower annually,equivalent to the annual absorption of CO2 by green plants in 90,272 m2 green area,and generating economic benefits of 37,000 yuan.The system can reduce carbon emissions by 15,002 tons of carbon dioxide equivalent in the whole life cycle,generating economic benefits of nearly 840,000 yuan.Therefore,the composite system has significant advantages of energy saving,emission reduction,and cost reduction,and has the potential and prospect of promotion and application in LNG terminals.
LNG cold energycarbon emissionsnearly zero energygreen buildingannual cost method
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