Table of Contents
- Much recoverable heat is low-grade - 25-60C drain water, vent air, or process streams. Too cool to use directly, but too warm to waste. A heat pump lifts it to a useful temperature using a little electrical work.
- Start with passive air-to-air or air-to-water recovery to catch the easy grade, then a heat pump upgrades the remainder. In a pool or laundry, drain-water recovery feeds the heat pump's evaporator.
- Domestic hot water from ventilation or drain heat. Process water pre-heat in food plants. Space heating backed by waste-heat basics.
- A heat pump delivering 3-5x the input energy (COP 3-5) can make low-grade recovery economic where passive methods alone fall short. Validate with a payback calculation and read the industrial waste-heat case for a real example.
Much recoverable heat is low-grade - 25-60C drain water, vent air, or process streams. Too cool to use directly, but too warm to waste. A heat pump lifts it to a useful temperature using a little electrical work.
Start with passive air-to-air or air-to-water recovery to catch the easy grade, then a heat pump upgrades the remainder. In a pool or laundry, drain-water recovery feeds the heat pump's evaporator.
- Domestic hot water from ventilation or drain heat.
- Process water pre-heat in food plants.
- Space heating backed by waste-heat basics.
A heat pump delivering 3-5x the input energy (COP 3-5) can make low-grade recovery economic where passive methods alone fall short. Validate with a payback calculation and read the industrial waste-heat case for a real example.