太阳能Issue(10)：40-52,13.DOI:10.19911/j.1003-0417.tyn20210225.01
太阳能与中深层地岩热多能互补供热技术的探索和研究
EXPLORATION AND RESEARCH ON MULTI ENERGY COMPLEMENTARY HEATING TECHNOLOGY OF SOLAR ENERGY AND MEDIUM-DEPTH STRATA GEOTHERMAL
摘要
Abstract
The reserves of solar energy and geothermal energy are huge，and they are low-carbon and clean energy with great development and application potential. The heating technology of medium-depth strata geothermal takes heat without water，which is a low-grade geothermal energy resource that can be exploited and applied. In this paper，by combining the solar heat collection system with the medium-depth strata geothermal heating system，and using the solar energy resources in Lanzhou，a set of multi energy complementary heating system using solar energy and medium-depth strata geothermal is designed and constructed with solar heat collection area is 202 m2，a single heat transfer well of medium-depth strata geothermal with a diameter of 200 mm and a depth of 2500 m. Under the condition of continuous heat extraction and rock temperature gradient of 30℃/km，the heat supply situation of the heat transfer well and the temperature recovery situation of the ground rock are simulated. Then，the control system of multi energy complementary heating system is optimized，and six operation modes are proposed. Finally，the actual operation of the multi energy complementary heating system in heating season is tested and analyzed. The results show that：1) The theoretical annual heat gain of the solar heat collection system is 133429 kWh，and its heat gain in the heating season accounts for 31.6% of the annual heat gain；2) The heat inlfuence radius of the heat transfer well using the medium-depth strata geothermal is about 8 m， and the recovery period of the rock temperature after the heating season is about 120 days，which can realize the continuous heating of the medium-depth strata geothermal；3) In the heating season，the average daily heat gain of the solar heat collection system in the multi energy complementary heating system is 307 kWh，which can provide about 11%of the heat for the entire multi energy complementary heating system；4) The multi energy complementary heating system has six operation modes，which can be automatically controlled according to the change of client heat load and sunshine conditions，lfexibly allocate energy，and give full play to the advantages of the two energy sources to achieve the purpose of the lowest heating cost.关键词
中深层地岩热/太阳能/多能互补/太阳能集热系统/可再生能源/清洁供热Key words
medium-depth strata geothermal/solar energy/multi energy complementation/solar heat collection system/renewable energy/clean heating分类
能源科技引用本文复制引用
田斌守,邵继新,杨海鸿,司双龙,蔺瑞山,夏斌..太阳能与中深层地岩热多能互补供热技术的探索和研究 [J].太阳能,2022,(10):40-52,13.基金项目
中央引导地方科技发展计划——兰白试验区太阳能及地热能科技创新服务平台；甘肃省建设科技攻关项目——非采暖季太阳能补充地岩热的应用示范研究(JK2018-30)；甘肃省建设科技项目——地热能开发利用对促进我省清洁能源产业发展的研究(JK2020-36) （JK2018-30）
