Grange Walk Heat Network Optimization Report

This document is a report detailing the optimization of the heat network at Grange Walk, an NHG development in Bermondsey, London. The report outlines the challenges faced by the existing two-pipe heat network, including persistent failures of the Heat Interface Units (HIUs) and issues with boiler corrosion due to riser bellows failures. It describes the collaboration between Notting Hill Genesis and FairHeat under the Heat Network Efficiency Scheme (HNES) Demonstrator to address these challenges. The report details the capital works undertaken, including plant room upgrades, the removal of top-of-riser bypasses, and the retrofitting of underperforming HIUs. The outcomes of these interventions are presented, highlighting improvements in heat supply reliability, proactive maintenance through remote visibility of water quality, and enhanced resident satisfaction. The report concludes with recommendations for other heat network operators to consider similar interventions to improve efficiency and reduce energy costs.