Corporate Knights Summary When it comes to heat, data centres deliver a double whammy. These massive computing hubs generate a constant torrent of excess heat while simultaneously using vast amounts of power to get rid of it. An estimated 38% to 40% of energy used by data centres goes toward cooling. Heat waste from computing workloads is considered low-grade heat, meaning anything less than 100°C. “With low temperature grades,” says Amin Mohammadi, a PhD candidate at Simon Fraser University’s Laboratory for Alternative Energy Conversion, “converting that energy to thermal energy or cooling energy would be the best option that you have.” In other words, it’s too gentle to be converted to electricity such as with steam from a boiler, but with the help of heat pumps, it’s perfect for making a hot shower or keeping interiors toasty on a cold day. There are data centres and centralized district heating systems working together, too, such as Stockholm Exergi or Denmark’s Fjernvarme Fyn. This application could play an important role in heat-waste recovery from the growing demand for computing capacity. A recent Leafcloud white paper outlined that different thermal outputs could be optimized for different applications: high-performance computing for higher heat-waste temperatures, such as 60°C to 80°C, could be sent to district heating, whereas standard servers that produce temperatures in the 40°C to 60°C range could be used for building heat. Continue Reading ...