Sewag Source is abundant in Daqing,useing double-stage sewage source heating pump systems to recovery heat,can effectively improve the existing energy structure and develop renewable clean energy.

• 大庆地区污水源丰富,采用双级污水源热泵系统回收余热,能够有效地改善现有能源的结构和发展可再生的清洁能源。