Uncertainty propagation and sensitivity analysis of thermo-physical properties of phase change materials (PCM) in the energy demand calculations of a test cell with passive latent thermal storage

Mazo, J. ; El Badry, A. T. ; Carreras, J. ; Delgado, M. ; Boer, D. ; Zalba, B. (Universidad de Zaragoza)

Resumen: In this work uncertainty propagation and sensitivity analyses have been applied to a case study of an application where PCM is integrated into the envelope of a test cell. The aim of the study is to quantify the influence of the uncertainties associated with the measurements of the thermo-physical properties of PCM on the results of the annual energy consumption. For this purpose, EnergyPlus has been used for the building energy simulation and a Monte Carlo based method has been chosen for the uncertainty and sensitivity analysis. Considering realistic uncertainty ranges for PCM thermo-physical properties, a significant uncertainty of savings on cooling energy demand has been calculated (approximately 10%). Phase change temperature and thermal conductivity have been identified as the most influential input parameters whereas phase change enthalpy is of secondary importance. A method has been proposed in order to calculate a combination of admissible uncertainties for the input variables that reduces output uncertainty to a required value. The method can be used if input variables and the behaviour of the model comply with certain conditions. For the case study, a maximum tolerance for the error of measurements of phase change temperature and thermal conductivity of ±0.3 °C and ±8% respectively is necessary to reduce the uncertainty of savings on cooling energy demand to 5%

Idioma: Inglés

DOI: 10.1016/j.applthermaleng.2015.07.047

Año: 2015

Publicado en: Applied Thermal Engineering 90 (2015), 596-608
ISSN: 1359-4311

Factor impacto JCR: 3.043 (2015)

Categ. JCR: ENGINEERING, MECHANICAL rank: 7 / 131 = 0.053 (2015) - Q1 - T1
Categ. JCR: THERMODYNAMICS rank: 6 / 57 = 0.105 (2015) - Q1 - T1
Categ. JCR: MECHANICS rank: 7 / 135 = 0.052 (2015) - Q1 - T1
Categ. JCR: ENERGY & FUELS rank: 30 / 88 = 0.341 (2015) - Q2 - T2

Factor impacto SCIMAGO: 1.683 - Industrial and Manufacturing Engineering (Q1) - Energy Engineering and Power Technology (Q1)

Financiación: info:eu-repo/grantAgreement/ES/MICINN/ENE2011-28269-C03-01
Financiación: info:eu-repo/grantAgreement/ES/MICINN/ENE2011-28269-C03-03

Tipo y forma: Article (PostPrint)

Área (Departamento): Área Máquinas y Motores Térmi. (Dpto. Ingeniería Mecánica)