Why Low-Temperature Heat-Pump Drying Conventional grain, fruit and herb drying often uses direct fossil-fired hot air above 80-120 C. That high temperature damages colour, aroma and nutrients and wastes energy. Heat-pump drying supplies warm air at 30-60 C, which protects product quality while still removing moisture. The catch is that the exhaust leaving the drying […]
High-Temperature Heat Pump Heat Recovery
A high-temperature heat pump (HTHP) upgrades low-grade waste heat to useful process temperatures of 80 to 120°C, replacing steam boilers or direct electric heaters in industry. This article covers selection and integration. How It Differs from a Standard Pump An HTHP uses refrigerants and compression ratios tuned for high lift. The trade-off is lower COP […]
Heat Pump Selection Calculation
A correct heat pump selection calculation prevents both undersizing (poor performance) and oversizing (short cycling and wasted capital). The method below applies to space heating, domestic hot water, and process heat recovery alike. Step 1 — Define the Load Start from the peak heating or cooling load in kW. For recovery duties, size to the […]
Heat Pump Waste Heat Recovery: Lifting Low-Grade Heat
The low-grade problem 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. How it pairs with air-to-air recovery Start with passive air-to-air or air-to-water recovery to […]