Development of a radiant heating and cooling model for building energy simulation software

Laouadi, Abdelaziz

doi:10.1016/j.buildenv.2003.09.016

Cited by 132 publications

(53 citation statements)

References 5 publications

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“…Laouadi [62] implemented a semi-analytical model of the RHC system in the energy simulation, where the RHC model is composed of two sets: a one-dimensional numerical model to analyze heat transfer within the building and a two-dimensional analytical model to calculate the heat transfer within the radiant medium, as described in Fig. 4 [62].…”

Section: )mentioning

confidence: 99%

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Ten questions about radiant heating and cooling systems

Rhee

Olesen²,

Kim

2017

Building and Environment

254

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Section: )mentioning

confidence: 99%

“…4 [62]. At each timestep, the twodimensional analytical model determines the net heat flux from the radiant system, which is then passed to a user selected node in the one-dimensional floor structure [63].…”

Section: )mentioning

confidence: 99%

Ten questions about radiant heating and cooling systems

Rhee

Olesen²,

Kim

2017

Building and Environment

254

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“…Scheatzle (2003) presented measured data set for validating simulation tools for radiant/convective systems and concluded that further work is needed to produce a user-friendly radiant/convective system as a package tool, for the thermal simulation of a whole building that can be used by the designers. Numerous studies on modeling radiant heating and/or cooling systems linked to thermal comfort indexes in buildings were presented in Wang et al (2005), Miriel et al (2002, Jones and Chapman KS (1994), Strand and Baumgartner (2005), Ardehali et al (2004), Laouadi (2004), Zmeureanu et al (2003), , Chapman and Zhang (1995), Zhang (1996), andJones (1998).…”

Section: Introductionmentioning

confidence: 98%

Energy efficiency and indoor thermal perception: a comparative study between radiant panel and portable convective heaters

Ali

Morsy

2010

Energy Efficiency

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This study investigates experimentally the thermal perception of indoor environment for evaluating the ability of radiant panel heaters to produce thermal comfort for space occupants as well as the energy consumption in comparison with conventional portable natural convective heaters. The thermal perception results show that, compared with conventional convection heater, a radiantly heated office room maintains a lower ambient air temperature while providing equal levels of thermal perception on the thermal dummy head as the convective heater and saves up to 39.1% of the energy consumption per day. However, for human subjects' vote experiments, the results show that for an environmentally controlled test room at outdoor environment temperatures of 0°C and 5°C, using two radiant panel heaters with a total capacity of 580 W leads to a better comfort sensation than the conventional portable natural convective heater with a 670 W capacity, with an energy saving of about 13.4%. In addition, for an outdoor environment temperature of 10°C, using one radiant panel heater with a capacity of 290 W leads to a better comfort sensation than the conventional convection heater with a 670 W capacity, with an energy saving of about 56.7%. From the analytical results, it is found that distributing the radiant panel heater inside the office room, one on the wall facing the window and the other on the wall close to the window, provides the best operative temperature distribution within the room. Keywords Energy efficiency . Radiant panel heater . Conventional natural convective heater . Indoor environment thermal perception . Energy saving Nomenclatures Alphabetic Symbols A surface area, m 2 c p specific heat, J/kg K F radiation configuration (shape) factor h heat transfer coefficient, W/m 2 K H room height, m Á m mass flow rate, kg/s N number of surface elements number, -q heat flux, W/m 2 Q heat transfer, W R th thermal resistance, m 2 K/ W T temperature, K or°C X axial horizontal distance, m, -y axial vertical distance, m, -Z axial distance, m, -Greek Symbols ε emittance ρ reflectance σ Stefan-Boltzmann constant, (5.67051×10 -8 ),

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“…Des weiteren werden die Grenzen des thermisch aktivierten Bauteils als ideal isoliert (adiabat) angenommen. Die Validierung des Modells nach [9] beschränkt sich auf eine Flächen-kühlung bzw. -heizung für nur einen Raum, [12].…”

Section: Introductionunclassified