污水源热泵干渠取水降温后的可恢复特性  

Restorability characteristic of intake water temperature drop in trunk canal of sewage heat pump

作　　者：吴荣华[1] 徐莹[2] 孙德兴[2] 任南琪[2] 

机构地区：[1]哈尔滨工业大学余热利用与热泵技术研究中心,哈尔滨150090 [2]哈尔滨工业大学市政环境工程学院,哈尔滨150090

出　　处：《哈尔滨工业大学学报》2008年第6期901-904,共4页Journal of Harbin Institute of Technology

基　　金：中国博士后科学基金资助项目(20060390808)

摘　　要：在调查并比较了热泵取水降温前后的渠温状态之后,基于渠温模型与调查结果预测了大、小温降的可恢复程度.由此定义并推导了可恢复性的准则关联参数φ与判定准则β,以及最小渠程与最大温降的关联式.结果表明:干渠条件特征值β由干渠、污水及土壤的结构与热物性参数描述,是所有问题的关键.不论大、小温降的渠温,均与原渠温一样向土壤地温接近,在一定的渠程范围内具有可恢复性.可恢复性由判定准则β、温降Δt及渠程z决定,与土壤地温无关.可恢复性准则式可用于指导工程上的渠水降温及对污水取热后的水处理工作的影响,在应用方面具有很大的意义.Based on the research of canal temperature state before and after lowering the intake water temperature, the restorability degree of lowering temperature has been forecasted. The criterion associated number of restorabilityφand the determination criterionβwere defined, and the relevancy formulas of the minimum canal route and the maximum temperature drop were deduced. The results show that the valueβattributing to the canal temperature model is described by the structure of trunk canal, urban sewage and soil, which is the key point of all the problems. The canal temperature with large or small lowering is approximate to the soil temperature, and can the restored in some range the value. The restorability is determined byβ, route and temperature drop△t and is irrelative with the soil temperature. Also the study case shows that criterions can be used to deal with the problems of intake water temperature drop and the influence of water treatment after taking heat from sewage in projects.

关 键 词：污水源热泵 渠温 地温 可恢复性 

分 类 号：TU831.6[建筑科学—供热、供燃气、通风及空调工程]