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- Bengtsson, Peder, 1968-, et al.
(författare)
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A household dishwasher heated by a heat pump system using an energy storage unit with water as the heat source
- 2015
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Ingår i: International journal of refrigeration. - : Elsevier. - 0140-7007 .- 1879-2081. ; 49, s. 19-27
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Tidskriftsartikel (refereegranskat)abstract
- Electricity usage by a household dishwasher can be reduced by using a heat pump system to heat the dishwasher cabinet, dishware and washing water. The evaporator obtains the energy from an energy storage unit which consists of a container filled with water which freezes to ice. The majority of the heat transfer from the energy storage to the evaporator occurs when ice is created in the energy storage unit. A transient simulation model of a dishwasher with a heat pump system was developed and compared to an experimental setup with good agreement. A simulation study of the compressor cylinder volume and the compressor operating time was performed. The results showed a 24% reduction in total electricity use compared to a dishwasher cycle using a traditional electric element.
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- Bengtsson, Peder, et al.
(författare)
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Performance Study of a Closed-Type Heat Pump Tumble Dryer Using A Simulation Model and an Experimental Set-Up
- 2014
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Ingår i: Drying Technology. - : Taylor & Francis Group. - 0737-3937 .- 1532-2300. ; 32:8, s. 891-901
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Tidskriftsartikel (refereegranskat)abstract
- In the interests of competitiveness, manufactures of tumble dryers are seeking to reduce both their electricity use and the drying time. This study examines how the cylinder volume of the compressor and the total heat transfer of the condenser influence the drying time and electricity use in a heat pump tumble dryer. A transient simulation model was developed and compared to an experimental set-up with good similarity. The simulations show that increasing the cylinder volume of the compressor by 50% decreases the drying time by 14% without using more electricity.
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- Berghel, Jonas, et al.
(författare)
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An Experimental Study on the Influence of Using a Draft Tube in a Continuous Spouted Bed Dryer
- 2014
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Ingår i: Drying Technology. - : Taylor & Francis. - 0737-3937 .- 1532-2300. ; 32:5, s. 519-527
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Tidskriftsartikel (refereegranskat)abstract
- Further increasing the production of processed biofuel also increases the demands on drying capacity. With the aim of increasing the heat capacity flow, experimental tests have been performed on the process of drying sawdust in a continuous spouted bed dryer with nine different draft tube designs. The results showed that a draft tube with an increased length and an increased disengagement height decreased the dry substances' flow rate throughout the dryer. The results also showed that the mass of the material in the dryer was approximately the same in all the tests. This means that the draft tubes, no matter their size, do not influence the amount of material in the dryer.
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