The giant heat pumps designed to warm whole districts

Chris BaraniukTechnology ReporterMVV EnergieMVV Energie is building the world's most powerful heat pump systemsThe pipe that will supply the heat pump, drawing water from the River Rhine in Germany, is so big that you could walk through it, fully upright, I'm told."We plan to take 10,000 litres per second," says Felix Hack, project manager at MVV Environment, an energy company, as he describes the 2m diameter…