Application of the Thermal Solar Energy in the Primary Circuit of Hot Water of the Four Palms Hotel

Aug 22, 2026

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A proposal for a hotel sanitary hot water system replaces the black steel pipe network in the primary circuit with high-density polypropylene pipes, enabling integration with thermal solar supply. A field of vacuum tube solar collectors is sized to substitute the heat recovery function of the water chiller. An economic and environmental assessment quantifies annual savings of 27,545 liters of LPG, valued at 51,728 USD, while avoiding 104,583 kg of CO2eq emissions. The investment payback time is 5.88 years, supporting feasibility for solar water heating.

LanguageEnglish

CategoryResearch & Report

FormatPDF

Pages7

Reading Time18 min

AccessFree to download

Introduction

Existing approaches to environmental impact and alternative energy

Correlations for convection and heat transfer in ducts

Flow stability and laminar convection models

Journal of Sustainability for Energy [https://www.acadlore.com/journals/JSE](https://www.acadlore.com/journals/JSE) Application of the Thermal Solar Energy in the Primary Circuit of Hot Water of the Four Palms Hotel Marien Gonzalez-Sanchez, Yanan Camaraza-Medina* Technical Sciences Faculty, University of Matanzas, 44440 Matanzas, Cuba * Correspondence: Yanan Camaraza-Medina ([ycamaraza1980@yahoo.com](ycamaraza1980@yahoo.com)) Received: 10-16-2022 Revised: 12-01-2022 Accepted: 12-22-2022 Citation: M. Gonzalez-Sanchez, Y. Camaraza-Medina,“Application of the thermal solar energy in the primary circuit of hot water of the four palms hotel,” J. Sustain. Energy, vol. 1, no. 1, pp. 1-7, 2022. [https://doi.org/10.56578/jse010101](https://doi.org/10.56578/jse010101) . © 2022 by the author(s) . Published by Acadlore Publishing Services Limited, Hong Kong. This article is available for free download and can be reused and cited, provided that the original published version is credited, under the CC BY 4.0 license. Abstract: A proposal is made in the sanitary hot water system in a hotel installation consisting in the change of the black steel pipe system by high density polypropylene pipes in the primary circuit of the system. A field of vacuum tube solar collectors is sized to work in replacement of the heat recovery system of the water chiller. An economic and environmental analysis of the proposal is made. With the installation of the solar collectors, the hotel will deduct 27,545 liters (15,425 kg) of liquid gas propane (LPG) from its annual consumption, equivalent to 51,728 USD, avoiding the emission of 104,583 kg of CO2eq into the environment. The simple recovery time of the investment will be 5.88 years. The results obtained demonstrate the feasibility of using solar thermal energy in the heating of sanitary water due to the decrease in the consumption of liquefied petroleum gas and, therefore, the environmental damage is reduced when greenhouse gases are no longer emitted. Keywords: Sanitary hot water; Solar thermal energy; Solar collectors; Heat recovery; Energy saving; Economic saving 1. Introduction It is based on studying pipes by intending to design an air conditioning and ventilation system to provide comfort and an optimal work environment to the working staff and the public to optimize operation. In this work it shows the implementation of innovative tools, acquisition of machines equipped with better technology in production processes, using the DMAIC methodology (also known as the five-step methodology. As a robust tool for improvement, it continuously interacts and the application of different tools to increase current productivity [1] . Other works expose the current situation of environmental behavior, throughout its life cycle, which allows us to quantify the environmental impact of these products. The production of air conditioning through the use of a centralized system that directly uses cold water from the sea or lake to cool the fresh water coming from airconditioned premises, is a technically and economically feasible and simple way of using alternative energy that allows savings of more than 80% of electrical energy, so its environmental and economic impact is significant [2] . Other research reflects that carrying out a study of the environmental behavior of a building is an arduous task, due to the fact that there is not enough information on the construction materials, for a system that uses the micro tunnels for conduction of air and offers comfort conditions to the plants considering air temperature and volumetric flow as fundamental aspects in order to optimize energy consumption in air conditioning [3, 4] . A generalized correlation for combined inflow convection in ducts of arbitrary cross section is presented [5] . The new correlation is not recommended for ducts that have small aspect ratios that pinch the flow when convection is prescribed by the constant heat flux wall

FAQs

What is the main modification proposed for the hotel hot water system?

The proposal replaces the black steel pipe system in the primary circuit with high-density polypropylene pipes and integrates thermal solar collectors to support the system’s heat supply.

How are vacuum tube solar collectors used in the proposed system?

A sized field of vacuum tube solar collectors is used to replace the heat recovery role of the water chiller within the primary circuit.

What are the estimated environmental and economic benefits?

With the solar collectors, the hotel reduces annual LPG use by 27,545 liters (15,425 kg), equivalent to 51,728 USD, and avoids 104,583 kg of CO2eq emissions. The simple investment recovery time is 5.88 years.

Aug 22, 2026

Upload by Angel