太阳能耦合地热能原油维温系统运行特性分析

Analysis on Operating Characteristics of Solar-Geothermal Coupled Crude Oil Heating System

原油静储期间受外界低温侵扰易发生凝罐事故,通常采用燃气锅炉对原油进行加热,但此加热方式存在能源消耗大、热效率低、污染高等问题。太阳能耦合地热能原油维温是一种可行方案,其通过利用时间互补、热量互补进行太阳能和地热能协同耦合,并采用瞬时系统模拟程序搭建太阳能-地热能联合原油维温系统,对系统运行特性进行分析。结果表明:运行周期内,浮顶油罐原油温度均高于设计静储温度,系统设计合理。全年供热量为11 977.2 GJ,太阳能集热器供热量占63.13%,地源热泵系统供热量占36.87%,一个运行周期后地下土壤平均温降0.54%。

The crude oil is susceptible to solidification accidents triggered by external low temperatures during the static storage period.Conventionally,the utilization of gas-fired boilers is the standard approach to address solidification accidents in crude oil static storage,but this method exhibits notable drawbacks such as high energy consumption,low thermal efficiency,and high pollution.Solar-geothermal coupled system is a feasible solution for crude oil heating,which leverages time complementarity and thermal complementarity for solar energy and geothermal energy synergistic coupling.A transient system simulation program was used to establish a solar-geothermal energy synergistic crude oil heating system,and the operating characteristics of the system were analyzed.Then the system operation control strategy was optimized,and its environmental and economic benefits were evaluated.The results showed that during the operational cycle,the temperature of the crude oil in the floating roof tank was higher than the design static storage temperature,indicating that the system design was reasonable.The total annual heat supply was 11977.2 GJ,with the solar collector providing 63.13%of the heat,while the ground source heat pump system provided 36.87%.After one operational cycle,the average temperature drop in the underground soil was 0.54%.