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Dishwasher modelica model analysis with an external heat loop.

Number: pap. 3692

Author(s) : CASKEY S. L., GROLL E. A.

Summary

Research efforts addressing large U.S. consumers can generate impactful reductions on the global energy picture. 41% of U.S. energy consumption is from buildings, 22% residential versus 19% commercial. Household appliances combine to 27%, the second largest residential site energy usage. With many appliances converting electricity to heat and generating waste heat, the authors propose energy reduction through thermal integration of all major appliances. The novel approach will require adding equipment and modifications to existing appliances for thermal sharing. A Modelica model is built for each appliance and simulated to quantify energy savings. The dishwasher is the first appliance investigated by installing a heat exchanger to heat the process water via an external hot water loop instead of the electric calrod heater. The traditional function is first captured in the model and the predicted water sump temperature is compared to available experimental data from the manufacturer. After tuning, the same model is run with a fixed temperature heat loop and any electrical savings is reported. After tuning, the dishwasher model of the traditional system shows an agreement within ±5% for most water sump temperatures. 0.564 kWh of energy is consumed by the calrod heater during the traditional mode versus 0.434 kWh during the heat loop input, a 23% reduction in electrical energy.

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Pages: 10

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Details

  • Original title: Dishwasher modelica model analysis with an external heat loop.
  • Record ID : 30025071
  • Languages: English
  • Source: 2018 Purdue Conferences. 5th International High Performance Buildings Conference at Purdue.
  • Publication date: 2018/07/09

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