Potential heat recovery from water transmission mains

We identified three facilities as potential users of recovered heat, including two hospitals and a college.

We assessed heating and cooling loads for these facilities and did comparisons with the heat capacity of nearby water transmission mains. We also assessed the compatibility of these facilities with a potable water source heating system.

For the most promising facility, the Saanich Peninsula Hospital, we developed several concept options and a business case, including an analysis of greenhouse gas emission reductions.

The financial analysis assessed the system over a 40 year life span, and included the impact of utility rate inflation, carbon tax, carbon credits, operating costs and financing. We also carried out a sensitivity analysis of electricity prices, natural gas prices, capital costs and thermal sales.

The team assessed the impact of various funding levels on project viability and identified potential sources of funding assistance.

We undertook a risk assessment, focusing on health and regulatory issues, and identified risk mitigation options.

The study concluded that potable water heat recovery for the hospital was technically and economically feasible. The CRD has used the results of the study to apply for funding from the Gas Tax Agreement Innovations Fund.