Reuse of Thermal Energy in Municipal Reclaimed Water: Assessment for Transmission Distance
With the aim of energy-saving and environment protection, Chinese government and energy consumers are focusing on energy recovery from municipal reclaimed water using the heat pump during building heating and cooling. Municipal reclaimed water assembled in treatment units need to be transmitted to satisfy remote heating and cooling demands in large-scale utilization projects, and transmission distance between treatment units and energy consumers is an important problem greatly affecting the efficient and economic performance of a municipal reclaimed water source heat pump system. Three key problems depending on transmission distance were analyzed. Reclaimed water temperature variation along the delivering pipeline was discussed in consideration of the mutual influence between the transmission medium and the circumjacent soil. Energy consumption of the transmission process was calculated based on pipeline frictional resistance, transmission energy consumption ratio was proposed as an evaluation index reflecting the system energysaving rate; the transmission distance influence on economic performance was evaluated by dynamic investment payback period and internal return rate. A comprehensive model to determine the transmission distance was presented, which can provide a theoretical analysis tool for system design.
municipal reclaimed water thermal energy recovery heat pump transmission distance
Lei Tian Qianpeng Yang Minzhi Li Lin Shi Wenwei Li Jing You Yuanlin Zou Ruixia Li Lei Wang
Department of Thermal Engineering, Tsinghua University, Beijing 100084, China Beijing Institute of Geoexploration and Technology, Beijing 100084, China
国际会议
大连
英文
883-886
2011-10-19（万方平台首次上网日期，不代表论文的发表时间）