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Potential energy savings made by using a specific control strategy when tumble drying small loads

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  • Stawreberg, Lena
  • Nilsson, Lars

Abstract

Tumble dryers manufactured today are optimised for their maximum capacity, i.e., 6–8kg of dry load. An average washing load in ordinary households lands at between 2 and 3.5kg dry load, which implies that the drying load is even smaller. The energy efficiency decreases with reduced drying load. The aim of this study is to establish a mathematical model for studying alternative control strategies for the venting tumble dryer in order to increase the energy efficiency of drying small loads. Two series of test runs were performed: the first series with three different drying loads was used as reference tests for validation of the mathematical model, and the second series was performed with airflow reduction. The model shows good agreement with the test runs. Two control strategies were tested using the model on the smallest drying load. By lowering the heat supply to the heater and by reducing the airflow, the energy efficiency increases by 6% in a small load drying cycle. It was not possible, however, for the investigated dryer, to reach the same energy efficiency for small loads as for the maximum drying load by using a control strategy.

Suggested Citation

  • Stawreberg, Lena & Nilsson, Lars, 2013. "Potential energy savings made by using a specific control strategy when tumble drying small loads," Applied Energy, Elsevier, vol. 102(C), pages 484-491.
    • Handle: RePEc:eee:appene:v:102:y:2013:i:c:p:484-491
    DOI: 10.1016/j.apenergy.2012.07.045
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    References listed on IDEAS

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    1. Lambert, A.J.D. & Spruit, F.P.M. & Claus, J., 1991. "Modelling as a tool for evaluating the effects of energy-saving measures. Case study: A tumbler drier," Applied Energy, Elsevier, vol. 38(1), pages 33-47.
    2. Ng, Ah Bing & Deng, Shiming, 2008. "A new termination control method for a clothes drying process in a clothes dryer," Applied Energy, Elsevier, vol. 85(9), pages 818-829, September.
    3. Yadav, V. & Moon, C.G., 2008. "Fabric-drying process in domestic dryers," Applied Energy, Elsevier, vol. 85(2-3), pages 143-158, February.
    4. Yadav, V. & Moon, C.G., 2008. "Modelling and experimentation for the fabric-drying process in domestic dryers," Applied Energy, Elsevier, vol. 85(5), pages 404-419, May.
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    Cited by:

    1. Cranston, Jonathan & Askalany, Ahmed & Santori, Giulio, 2019. "Efficient drying in washer dryers by combining sorption and heat pumping," Energy, Elsevier, vol. 183(C), pages 683-692.
    2. Patel, Viral K. & Gluesenkamp, Kyle R. & Goodman, Dakota & Gehl, Anthony, 2018. "Experimental evaluation and thermodynamic system modeling of thermoelectric heat pump clothes dryer," Applied Energy, Elsevier, vol. 217(C), pages 221-232.
    3. Dupuis, Eric D. & Momen, Ayyoub M. & Patel, Viral K. & Shahab, Shima, 2019. "Electroelastic investigation of drying rate in the direct contact ultrasonic fabric dewatering process," Applied Energy, Elsevier, vol. 235(C), pages 451-462.
    4. Defraeye, Thijs, 2014. "Advanced computational modelling for drying processes – A review," Applied Energy, Elsevier, vol. 131(C), pages 323-344.

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