Experiments and simulations on the thermal performance of a sunspace attached to a room including heat-storing porous bed and water tanks

Owrak, Mehrnaz; Aminy, Mohammad; Jamal-Abad, Milad Tajik; Dehghan, Maziar

doi:10.1016/j.buildenv.2015.04.022

Cited by 54 publications

(21 citation statements)

References 24 publications

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“…A dynamic model of a solar pond was developed in order to investigate the effect of the sunny area ratios on the efficiency by [3]. Experimental and simulation studies on the thermal performance of a room heated with an attached sunspace were conducted by [4]. The thermal behaviour of volumetric solar receiver with double-layer of porous media and the effects of geometry of each layer on the performance was numerically studied by [5].…”

Section: Introductionmentioning

confidence: 99%

Mathematical modelling and simulation of multiphase flow in a flat plate solar energy collector

Helvaci

Khan

2015

Energy Conversion and Management

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a b s t r a c tNon-conventional collectors where organic fluid or refrigerant experience a phase change have many advantages over conventional collectors which have either air or relatively high temperature boiling liquid. Increase in heat transfer coefficient and system efficiency, corrosion prevention and freeze protection are the main benefits of the first type. In this study, a detailed numerical model of a flat plate collector is developed to investigate the fluid mean temperature, useful heat gain and heat transfer coefficient along the collector tube. The refrigerant HFC-134a was used in the simulation as the working fluid of the collector. The model can both predict the location where the fluid undergoes a phase change in the tube and the state at the exit under given inlet conditions. The effect of boiling on the heat transfer coefficient of the fluid is also investigated. Simulations were performed at three different mass flow rates (0.001, 0.005 and 0.01 kg/s) and three different operating pressures (4, 6 and 8 bar) to be able to see the effect of mass flow rate and pressure on plate temperature, heat loss coefficient, efficiency of the collector and the heat transfer coefficient of the fluid. The simulation results indicate that the heat transfer coefficient of the fluid increases from 153.54 W/m 2 K to 610.27 W/m 2 K in multiphase flow region. In the liquid single phase region, the collector efficiency rises from 60.2% to 68.8% and the heat transfer coefficient of the fluid increases from 39.24 W/m 2 K to 392.31 W/m 2 K with an increased flow rate whereas the collector efficiency decreases from 72.5% to 62.3% as the operating pressure increases from 4 bar to 8 bar. In order to validate the simulation model an experimental test rig was built and the experiments were performed with HFE 7000 as working thermo-fluid. A new simulation model utilizing HFE 7000 has been developed and the outlet temperature of the fluid was compared with the measured outlet temperature. Both measured and simulated results have shown close conformity.

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Section: Introductionmentioning

confidence: 99%

Mathematical modelling and simulation of multiphase flow in a flat plate solar energy collector

Helvaci

Khan

2015

Energy Conversion and Management

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“…Otherwise, the material properties for the z-direction are affected by the type of insulation, especially the compressive strength of the specimen. In these results, it is shown that the EPS is the most effective to reduce the thermal conductivity because of its higher specific heat Owrak et al (2015), while corrugated paper is the most beneficial insulation material for larger strength of the specimen because of its larger elasticity and strength. Fig.…”

Section: Materials Responses Of the Virtual Insulating Specimensmentioning

confidence: 85%

The Effects of Anisotropic Insulations with Different Spatial Distributions on Material Properties of Mortar Specimens

Chung

Elrahman

Stephan

2017

Int J Concr Struct Mater

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Insulating concrete is a material designed to reduce heat conduction with pores/insulations, and these pores strongly affect the material characteristics. In general, the insulation effect is directly proportion to the pore volume, while the material strength decreases as the porosity increases. To overcome this contrary, anisotropic insulations with different spatial distributions are proposed and investigated in this study. A set of mortar specimens with different arrangements of coin-shaped insulations are produced to examine the anisotropic insulation effect on the material characteristics. In addition, different types of insulation materials and their effect on the materials are also investigated here. X-ray computed tomography images and probabilistic description methods are used to confirm the arrangement of the insulations. The thermal and mechanical responses for different directions are investigated using both experimental and numerical methods. From the results, it is demonstrated that the use of anisotropic insulations for a specific direction can enhance the insulation efficiently as well as minimizing the loss of compressive strength.

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“…Este programa 1).Construido en 2010 y diseñado de acuerdo a principios biocliha sido utilizado bastamente en todo el mundo para el análisis del máticos y sostenibles, el edifcio de una sola planta está compuescomportamiento térmico en el campo de la edifcación [23]- [29] to por cuatro módulos conectados por un pasillo; el situado más al con resultados válidos, siendo, por tanto, el que se usará en este oeste se usa como sala de conferencias y ofcina, con un espacio estudio.…”

Section: Objeto De Estudiounclassified

Análisis De La Simulación Y Monitoreo Real De Un Invernadero en La Implicación Térmica De Un Edificio. Un Caso Práctico.

Puertolas¹,

Losada²

2017

DYNAII

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Análisis de la simulación y monitoreo real de un invernadero en la implicación térmica de un edifcio. Un caso práctico Rubén Felices-Puértolas, Carmen Viñas-Arrebola, Juan-Carlos Losada-González Análisis de la simulación y monitoreo real de un invernadero en la implicación térmica de un edifcio. Un caso práctico Simulation and monitoring campaign in a sunspace, analysis of its infuence over the building thermal performance. A case study

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Experiments and simulations on the thermal performance of a sunspace attached to a room including heat-storing porous bed and water tanks

Cited by 54 publications

References 24 publications

Mathematical modelling and simulation of multiphase flow in a flat plate solar energy collector

Mathematical modelling and simulation of multiphase flow in a flat plate solar energy collector

The Effects of Anisotropic Insulations with Different Spatial Distributions on Material Properties of Mortar Specimens

Análisis De La Simulación Y Monitoreo Real De Un Invernadero en La Implicación Térmica De Un Edificio. Un Caso Práctico.

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