and the molecules in the water move slower (decreasing temperature). When fast-moving atoms or molecules hit slower-moving atoms or molecules and increase their speed, heat is transferred. This ...

Heating and cooling heavily relies on planet-warming fossil fuels. But some energy companies are looking to an unlimited ...

Vattenfall Wärme Berlin AG, a unit of Sweden-based utility Vattenfall, and Germany's Siemens Energy AG are currently building an 8MW high-temperature heat pump at Potsdamer Platz in Berlin to ...