Experimental analysis of a coiled stirred tank containing a low cost PCM emulsion as a thermal energy storage system
Resumen: This article presents the results of heat transfer coefficient and volumetric energy density measurements in an agitated tank containing a low-cost phase change material emulsion, heated by water flowing in a coil. For the stirring a three-stage impeller is placed in the central axis of a 46 l commercial tank. By measuring the temperature dependency on time and solving the transient enthalpy balance, the heat transfer coefficient between the helical coil and the agitated phase change material emulsion is determined, based on the impeller Reynolds number. The thermal energy storage efficiency has also been analysed. This phase change material emulsion shows a phase change temperature range between 30 and 50 °C. Its solid content is about 60% with an average size of 1 µm. The results have shown that the overall heat transfer coefficient is around 3.5–5.5 times higher when a stirring rate of 290–600 rpm is used. Furthermore, even at the lowest stirring rate, the thermal energy storage efficiency improves from 76-77%–100%, without detriment to the energy consumption of the stirrer.
Idioma: Inglés
DOI: 10.1016/j.energy.2017.07.044
Año: 2017
Publicado en: Energy 138 (2017), 590-601
ISSN: 0360-5442

Factor impacto JCR: 4.968 (2017)
Categ. JCR: THERMODYNAMICS rank: 4 / 59 = 0.068 (2017) - Q1 - T1
Categ. JCR: ENERGY & FUELS rank: 18 / 96 = 0.188 (2017) - Q1 - T1

Factor impacto SCIMAGO: 1.99 - Building and Construction (Q1) - Civil and Structural Engineering (Q1) - Electrical and Electronic Engineering (Q1) - Pollution (Q1) - Industrial and Manufacturing Engineering (Q1) - Mechanical Engineering (Q1) - Energy (miscellaneous) (Q1)

Financiación: info:eu-repo/grantAgreement/ES/MICINN/ENE2014-57262-R
Tipo y forma: Artículo (PostPrint)
Área (Departamento): Área Máquinas y Motores Térmi. (Dpto. Ingeniería Mecánica)

Creative Commons Debe reconocer adecuadamente la autoría, proporcionar un enlace a la licencia e indicar si se han realizado cambios. Puede hacerlo de cualquier manera razonable, pero no de una manera que sugiera que tiene el apoyo del licenciador o lo recibe por el uso que hace. No puede utilizar el material para una finalidad comercial. Si remezcla, transforma o crea a partir del material, no puede difundir el material modificado.


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