Dynamic model and experimental validation for a gas cooler of a CO2 heat pump for heating residential water

  1. de Oliveira, R.N. 1
  2. Faria, R.N. 2
  3. Antonanzas-Torres, F. 1
  4. Machado, L. 3
  5. Koury, R.N.N. 3
  1. 1 University of California, San Diego
    info

    University of California, San Diego

    San Diego, Estados Unidos

    ROR https://ror.org/0168r3w48

  2. 2 Federal Center of Technological Education of Minas Gerais, Mechatronics Department, Divinopólis, MG, Brazil
  3. 3 Universidade Federal de Minas Gerais
    info

    Universidade Federal de Minas Gerais

    Belo Horizonte, Brasil

    ROR https://ror.org/0176yjw32

Mostrar afiliaciones +
Revista:
Science and Technology for the Built Environment

ISSN: 2374-4731

Año de publicación: 2016

Volumen: 22

Número: 1

Páginas: 30-40

Tipo: Artículo

DOI: 10.1080/23744731.2015.1070647 SCOPUS: 2-s2.0-84964037992 GOOGLE SCHOLAR

Otras publicaciones en: Science and Technology for the Built Environment

Resumen

This work presents a dynamic model for a CO2 heat pump gas cooler. The gas cooler model is based on the conservation equations of energy, mass, and momentum. Due to the importance of an expansion device and a compressor for heat exchanger modeling, detailed mathematical treatment is also given to those devices. The spatial variations of temperature, pressure, specific volume, and mass flow rate are predicted at each time step. The model is validated by comparing simulation results and experimental data for transient and steady conditions. It observes a reasonably good agreement between these results, with a maximum deviation of 2◦C (3.6◦F) between the mathematical model and experimental data, with the test data exhibiting a fairly similar trend. The developed model is therefore presented as a useful tool for analyzing the dynamic behavior for the gas cooler of a heat pump operating with CO2. © 2016 ASHRAE.