Všechny publikace

Possibilities of Improving COP of Peltier Cells Operating as a Heat Pump

  • Autoři: Ing. Jan Rimbala, doc. Dr. Ing. Jan Kyncl,
  • Publikace: Proceedings of the 2022 22nd International Scientific Conference on Electric Power Engineering. Ostrava: Vysoká škola báňská - Technická univerzita v Ostravě, 2022. p. 37-40. ISSN 2376-5631. ISBN 978-1-6654-1057-1.
  • Rok: 2022
  • DOI: 10.1109/EPE54603.2022.9814133
  • Odkaz: https://doi.org/10.1109/EPE54603.2022.9814133
  • Pracoviště: Katedra elektroenergetiky
  • Anotace:
    Peltier cell (hereinafter PC) has undergone technological development since it's discovery by Joan C. Peltier in 1834, and from the point of view of theoretical physics they can be considered completely explored. They are commonly used for low-power cooling (for example car refrigerators) and for temperature control (controlled electronics cooling), ie mostly in low-power applications from the point of view of the power industry. We are currently experiencing enormous pressure to save energy and use waste heat, so the question arises as to whether it would not be possible to dust off the idea of 'energy' use of PC.

Primary energy reduction using small CHP systems

  • DOI: 10.1109/EPE51172.2020.9269204
  • Odkaz: https://doi.org/10.1109/EPE51172.2020.9269204
  • Pracoviště: Katedra elektroenergetiky
  • Anotace:
    This work deals with the creation of a control model for a system with CHP units, heat pump and energy storage. By simulating such system, it can be designed and optimized for primary energy consumption and investment. The model also enables extrapolation of the monitored quantities from energy consumption over a known period of time.

The possibilities of reducing energy consumption for the preparation of hot water by suitable switching of the heat pump

  • Autoři: Ing. Jan Rimbala, doc. Dr. Ing. Jan Kyncl,
  • Publikace: 2020 21st International Scientific Conference on Electric Power Engineering (EPE). Prague: Czechoslovakia Section IEEE, 2020. ISBN 978-1-7281-9479-0.
  • Rok: 2020
  • DOI: 10.1109/EPE51172.2020.9269251
  • Odkaz: https://doi.org/10.1109/EPE51172.2020.9269251
  • Pracoviště: Katedra elektroenergetiky
  • Anotace:
    The article deals with the possibilities of reducing energy consumption for the preparation of hot water by suitable switching of the air-to-water heat pump according to the expected time course of the outdoor air temperature. Higher temperature of the medium from which we pump heat always leads to an improvement of the heating factor. The article describes an idealized model taking into account two water storage The consumed electrical energy is always evaluated at the worst possible switching time of the heat pump, at a fixed switching time and with optimal switching. The considered procedure may be suitable for buildings with high hot water consumption, such as hospitals, retirement homes, or for small industrial enterprises.

Theoretical measurement limits of parameters of commissioned heat pumps

  • Autoři: Ing. Jan Rimbala, doc. Dr. Ing. Jan Kyncl,
  • Publikace: 2020 21st International Scientific Conference on Electric Power Engineering (EPE). Prague: Czechoslovakia Section IEEE, 2020. ISBN 978-1-7281-9479-0.
  • Rok: 2020
  • DOI: 10.1109/EPE51172.2020.9269188
  • Odkaz: https://doi.org/10.1109/EPE51172.2020.9269188
  • Pracoviště: Katedra elektroenergetiky
  • Anotace:
    This paper analyzes the uncertainties of measuring the heat and cooling factors of compressor and absorption heat pumps. The article analyzes the uncertainties of measurement and, in two case studies, it is shown that without the use of laboratory calibrated measuring instruments, the cooling and heating factor plowing is considerably inaccurate and is better based on manufacturer data.

Assessment of energy consumption in the residential building with a heat pump

  • Autoři: Ing. Jan Rimbala, Ing. Jan Votava, doc. Dr. Ing. Jan Kyncl,
  • Publikace: Proceedings of the 2019 20th International Scientific Conference on Electric Power Engineering, EPE 2019. Ostrava: Vysoká škola báňská - Technická univerzita Ostrava. Fakulta elektrotechniky a informatiky, 2019. ISSN 2376-5631. ISBN 978-1-7281-1333-3.
  • Rok: 2019
  • DOI: 10.1109/EPE.2019.8778066
  • Odkaz: https://doi.org/10.1109/EPE.2019.8778066
  • Pracoviště: Katedra elektroenergetiky
  • Anotace:
    This paper analyzes the accuracy of the calculation of the energy needed for the heating of residential buildings by heat pumps. The reference value is the consumption obtained from the actual time course of temperature and the heat loss calculated by solving the partial differential equations. This value is compared with the results obtained using average daily and monthly temperatures and using a static wall model without heat capacity. The calculations are performed for the Carnot heat pump and for the currently used WPL18 heat pump.

Optimized use of the steam accumulator in the combined heat and power production

  • DOI: 10.1109/EPE.2019.8778141
  • Odkaz: https://doi.org/10.1109/EPE.2019.8778141
  • Pracoviště: Katedra elektroenergetiky
  • Anotace:
    This paper presents technical analysis of the usage of steam accumulator in the combined heat and power production and also in all general steam production. Created mathematical model is possible to use for evening on wanted slope of steam flow change.

Za stránku zodpovídá: Ing. Mgr. Radovan Suk