Análisis numérico de los mapas de patrones de flujo del refrigerante R600a en un colector/evaporador de una bomba de calor asistida por energía solar

William Quitiaquez; Eduardo Cortez; Karen Anchapaxi; C.A. Isaza-Roldán; César Nieto-Londoño; Patricio  Quitiaquez; Fernando Toapanta-Ramos

doi:10.17163/ings.n26.2021.10

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Published: Jun 29, 2021

DOI: https://doi.org/10.17163/ings.n26.2021.10

Keywords:

Flow patterns, two-phase flow, heat transfer, R600a

William Quitiaquez

{"en_US":"Universidad Iberoamericana del Ecuador"}

http://orcid.org/0000-0001-9430-2082

Eduardo Cortez

{"en_US":"Universidad Iberoamericana del Ecuador"}

https://orcid.org/0000-0003-4417-227X

Karen Anchapaxi

{"en_US":"Universidad Iberoamericana del Ecuador"}

https://orcid.org/0000-0001-9190-9380

C.A. Isaza-Roldán

{"en_US":"Universidad Iberoamericana del Ecuador"}

https://orcid.org/0000-0002-5902-6411

César Nieto-Londoño

{"en_US":"Universidad Iberoamericana del Ecuador"}

https://orcid.org/0000-0001-6516-9630

Patricio Quitiaquez

{"en_US":"Universidad Iberoamericana del Ecuador"}

https://orcid.org/0000-0003-0472-7154

Fernando Toapanta-Ramos

{"en_US":"Universidad Iberoamericana del Ecuador"}

https://orcid.org/0000-0002-0838-4702

Abstract

This research work presents a detailed description of the flow patterns maps generated in a horizontal pipe of the collector/evaporator of a direct-expansion solar-assisted heat pump, using R600a refrigerant as working fluid. The study was performed in a pipe with an internal diameter of 3.8 mm and a length of 1000 mm, mass velocities varying between 197.59 and 267.26 kg·m-2·s-1 and heat flux between 72.83 and 488.27 W·m-2; during the experimental tests, an incident solar radiation between 0 and 652.9 W·m-2 was present. The Wojtan, Ursenbacher and Thome correlation was considered for the analysis and the model used does not require iterative calculations; moreover, it carries out a detailed analysis of the different zones present along the pipe. The predominant zones in this study are intermittent, annular and dryout, found in the five tests, however, due to the working conditions in all tests with the exception of test A, mist and stratified-wavy flow were found.

Issue

No. 26 (2021): july-december

Section

Scientific Paper

The Universidad Politécnica Salesiana of Ecuador preserves the copyrights of the published works and will favor the reuse of the works. The works are published in the electronic edition of the journal under a Creative Commons Attribution/Noncommercial-No Derivative Works 4.0 Ecuador license: they can be copied, used, disseminated, transmitted and publicly displayed.

The undersigned author partially transfers the copyrights of this work to the Universidad Politécnica Salesiana of Ecuador for printed editions.

It is also stated that they have respected the ethical principles of research and are free from any conflict of interest. The author(s) certify that this work has not been published, nor is it under consideration for publication in any other journal or editorial work.

The author (s) are responsible for their content and have contributed to the conception, design and completion of the work, analysis and interpretation of data, and to have participated in the writing of the text and its revisions, as well as in the approval of the version which is finally referred to as an attachment.

Author Biography

William Quitiaquez, {"en_US":"Universidad Iberoamericana del Ecuador"}

William Giovanny Quitiaquez Sarzosa, nació el 11 de Marzo del año 1988, sus estudios de primaria los realizó en la escuela Pensionado Mixto Rumiñahui, luego de esto ingresó al Colegio Técnico “Don Bosco” institución en la cual obtuvo el título de Bachiller Técnico en Mecánica Industrial, tiempo después logró ingresar a la prestigiosa Universidad Politécnica Salesiana en la cual obtuvo el título de Ingeniero Mecánico en el año 2011, para esto realizó el diseño y construcción de una máquina extractora de aceite de chonta un fruto muy conocido en el Oriente Ecuatoriano, dicha máquina fue realizada para ayudar a las personas que habitan en la Amazonía Ecuatoriana, con dicho proyecto se realizó un libro titulado “Diseño y construcción de molinos para extraer aceite de los frutos de chonta y morete” el cual servirá como una herramienta de estudio para futuras generaciones, sus estudios de cuarto nivel los realizó en la Universidad Técnica de Cotopaxi obteniendo el título de Magister en Gestión de Energías Renovables, realizó un proyecto de investigación en la Universidad Politécnica Salesiana, lugar donde brinda sus servicios profesionales como docente investigador en la Carrera de Ingeniería Mecánica, la investigación estuvo enfocada en la obtención de agua destilada utilizando únicamente energía solar. Realizó tres ponencias internacionales en Cuba en el “Seminario Internacional de Energías CINAREM 2013” y en Ecuador en las “Segundas Jornadas Internacionales de Investigación Científica, Energías Renovables y Calidad Energética” representando de una manera excelente a su país natal y a la Universidad Politécnica Salesiana.

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William Quitiaquez, {"en_US":"Universidad Iberoamericana del Ecuador"}

References