Ring network topology and variable flow control are two improvements in district heating technology that would lead to higher energy efficiency. The ring network represents an alternative topology to the traditional DH distribution networks. The key to success of this topology is the fact that the return line starts at the closest consumer to the heat station and not at the furthest one, in a way that the return water flows in the same direction as the supply water and the total pipe length gets equalized for all the consumers. This leads to an important balancing effect that simplifies the control of the network to a great extent. In the same manner, the centralized single speed pump and control valves are replaced by inverter-controlled variable speed local pumps both on the primary and secondary sides, which has a positive effect on the system. The elimination of the valve related pressure losses results in lower pumping power needs that allow smaller pipe dimensions, lowering investments and operating costs.
|Number of pages||4|
|Journal||Euroheat and Power (English Edition)|
|Publication status||Published - 2015|
|MoE publication type||A1 Journal article-refereed|