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Energetic analysis in a hot water system: a hotel facility case study

Valdivia Nodal, Yarelis; Hernández Herrera, Hernán; Reyes Calvo, Roy; Álvarez Guerra, Mario; Silva Ortega, Jorge I; Santana Justiz, Miguel (International Centre for Sustainable Development of Energy, Water and Environment Systems SDEWESCroatia, 2023)

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 ...
Statistical analysis of design variables in a chiller plant and their influence on energy consumption and life cycle cost

diaz torres, yamile; Gullo, Paride; Hernández Herrera, Hernán; Torres del Toro, Migdalia; Álvarez Guerra, Mario A.; Silva Ortega, Jorge I; Speerforck, Arne (MDPI AGSwitzerland, 2022-08-16)

An appropriate design of a chiller plant is crucial to guarantee highly performing solutions. However, several design variables, such as type of systems, total cooling capacity, and hydraulic arrangement, need to be ...

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Energetic analysis in a hot water system: a hotel facility case study
...
Valdivia Nodal, Yarelis | 2023

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.

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Statistical analysis of design variables in a chiller plant and their influence on energy consumption and life cycle cost
...
diaz torres, yamile | 2022-08-16

An appropriate design of a chiller plant is crucial to guarantee highly performing solutions. However, several design variables, such as type of systems, total cooling capacity, and hydraulic arrangement, need to be considered. On the one hand, at present, different technical criteria for selecting the most suitable design variables are available. Studies that corroborate the influence of the design variables over the operational variables are missing. In order to fill this knowledge gap, this work proposes a statistical analysis of design variables in chiller plants operating in medium- and large-scale applications and evaluates their influence on energy consumption and life cycle cost (LCC) under the same thermal demand conditions. A case study involving 138 chiller plant combinations featuring different arrangements and a Cuban hotel was selected. The results suggested that the total chiller design and cooling capacity distribution among chillers have a significant influence on the energy consumption of the chiller plant with a Spearman’s Rho and Kendall Tau (τ) correlation index value of −0.625 and 0.559, respectively. However, with LCC, only the cooling capacity distribution among the chillers had a certain influence with a Kendall Tau correlation index value of 0.289. As for the considered total cooling capacity, the applied statistical test showed that this design variable does not have any influence on performing the chiller plant.

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Energetic analysis in a hot water system: a hotel facility case study ﻿

Statistical analysis of design variables in a chiller plant and their influence on energy consumption and life cycle cost ﻿

Envíos recientes

Energetic analysis in a hot water system: a hotel facility case study

Statistical analysis of design variables in a chiller plant and their influence on energy consumption and life cycle cost

Energetic analysis in a hot water system: a hotel facility case study

Statistical analysis of design variables in a chiller plant and their influence on energy consumption and life cycle cost