Izvorni znanstveni članak
https://doi.org/10.13044/j.sdewes.d10.0428
Energetic analysis in a hot water system: A hotel facility case study
Yarelis Valdivia Nodal
; Universidad de Cienfuegos, Cienfuegos, Cuba
Hernan Hernandez Herrera
; Universidad Simón Bolivar, Barranquilla, Colombia
Roy Reyes Calvo
; Universidad de Cienfuegos, Cienfuegos, Cuba
Mario Álvarez Guerra
; Universidad de Cienfuegos, Cienfuegos, Cuba
Jorge Silva
; Universidad de la Costa, Barranquilla, Colombia
Miguel Santana Justiz
; Universidad de Cienfuegos, Cienfuegos, Cuba
Hernan Hernandez Herrera
; Universidad Simón Bolívar, Barranquilla, Colombia
Sažetak
This paper evaluates the energy operational performance of a system to produce domestic hot water, from the use of waste heat in a centralized air conditioning system in a hotel in Cuba. The hotel facility has two different chillers capacities, where the system recovers the condensed heat, through a heat exchanger at the compression process outlet. These schemes allow the simultaneous production of air conditioning and Domestic Hot Water, also those considering thermal storage tanks. The system modelling starts analyzing its components and their processes, based on the traditional thermodynamics and heat transfer equations and ends with a validation process. This model estimates a wide range of operating conditions, such as thermal demands of the cooling load, the chiller water temperature, the electricity consumed by chillers, and the climatological variables involved. The system is evaluated in the highest tourism season in Cuba during a year under partial load. Results were validated in a hotel as a study case, which allowed us to estimate the thermal potential available in the plant to meet the thermal demand of the hot water required, as well as showing that variations in the chiller operation affect the temperature stability in the hot water system.
Ključne riječi
Domestic hot water; energy saving; chiller; hotels; heat recovery
Hrčak ID:
296453
URI
Datum izdavanja:
31.3.2023.
Posjeta: 266 *