一种新的分布式水泵供热布置方案分析

Analysis of a New Distributed-Pump Scheme Applied in District Heating Network

供热管网的用户端应用分布式水泵代替阀门来调节水力工况有助于节约水泵能耗。在比较单热源枝状管网采用传统阀门调节和分布式水泵调节供热方案的水力工况和节能性能的基础上,提出一种新的分布式水泵供热布置方案。通过理论及案例分析了多热源环状管网应用这一新方案下的变工况水力调节性能、水温稳定性能及节能性能。结果表明,新的分布式水泵布置方案有利于降低供热系统的功耗、减缓用户水温波动,并具有供热质与量的调节相对独立、调节控制策略简便的特点。

It is helpful for energy efftciency to use distributed pumps instead of valves to regulate hydraulic balance in a district heating system （DHS）. A new scheme of distributed pump-system is presented based on performance comparison of hydraulic regime and power saving of single-heat-source dendritic pipeline networks with regulating valves and/or distributed pumps. Supposing that the new scheme was employed in multi-sources looped-pipe network, theoretical analysis and case study were carried out to evaluate off- design performances including hydraulic self-regulation, supply water temperature stability and power- saving potential. The results indicated that the proposed scheme would contribute to minimizing power consumption, retarding water temperature change, and would be convenient to adjust the quality and quantity independently in the looped-pipe heat supply networks.