Efficient drying in washer dryers by combining sorption and heat pumping
2019
Cranston, Jonathan | Askalany, Ahmed | Santori, Giulio
The worldwide need for improved energy efficiency in end use energy demand technologies catalyses the development of advanced household devices. Efficiency in the end use of energy also embraces the development of advanced household technologies with lower energy demand. Wet appliances are among the most energy intensive domestic devices in the domestic sector and accordingly they are a class of devices that require a reduction of their energy intensity. In this research a highly efficient washer-dryer that embeds a heat pump for drying is characterised experimentally and theoretically. With a 3 kg standard load, the heat pump washer-dryer results in 0.83 kWh energy consumption which correspond to 41% of an equivalent Class A device. The energy efficiency can be improved through hybridisation of the technology with a sorption bed. A theoretical assessment of the hybrid sorption/heat pump washer-dryer system shows that it can work with 0.78 kWh and shorter cycle time.
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