Thermal Performance Analysis of Reinforced Concrete Floor Structure with Radiant Floor Heating System in Apartment Housing

Jeong, Young-Sun; Jung, Hye-Mi

doi:10.1155/2015/367632

Cited by 14 publications

(10 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Contrary to PU/PRG foams, PU/GL foams are characterized by the reducing thermal conductivity. It might be explained by the increasing density and, accordingly, decreasing radiant heat transfer via trapped gases in smaller foam cells in the higher density foams (Jeong, Jung 2015). As can be seen from Figure 1c, PU/ ST foams have almost the same thermal conductivity value independently from the ST content used.…”

Section: Thermal Conductivity and Cell Sizementioning

confidence: 84%

The Impact of Chain Extender on the Properties of Polyurethane Foam Based on Rapeseed Oil Polyol Obtained via Chemo–enzymatic Route

Kairytė

Vaitkus

Balčiūnas

2016

Engineering Structures and Technologies

View full text Add to dashboard Cite

Presently, researches regarding green chemistry are conducted due to its significance for the mitigation of environmental problems, particularly those related to carbon dioxide emissions in relation to global warming and the usage of fossil feedstocks not only for energy generation but also for materials production. The study examines the impact of bio-products such as corn starch, rapeseed glycerin as well as petroleum based propylene glycol as bifunctional and trifunctional chain extenders on physical-mechanical properties of polyurethane foam from rapeseed oil polyol derived via chemo-enzymatic route. The obtained foams were characterized using European and international methodologies for determination of density, compressive strength perpendicular and parallel to foaming directions, thermal conductivity, long-term water absorption after 28 days of immersion, closed cell content and cell size. Foams containing (5–25) pphp of corn starch display significantly lower values in density and compressive strength as well as cell size compared to the neat polyurethane foam. The greatest compressive strength and the lowest thermal conductivity are obtained for foams with 25 pphp of rapeseed glycerin. All foams extended with bio-products and propylene glycol are characterized by the higher long-term water absorption compared to that of the neat polyurethane foam.

show abstract

Section: Thermal Conductivity and Cell Sizementioning

confidence: 84%

The Impact of Chain Extender on the Properties of Polyurethane Foam Based on Rapeseed Oil Polyol Obtained via Chemo–enzymatic Route

Kairytė

Vaitkus

Balčiūnas

2016

Engineering Structures and Technologies

View full text Add to dashboard Cite

show abstract

“…According to Jeong & Jung (2015), the heating system with hydraulic underfloor heating needs a longer pre-heating time to reach the desired temperature, as compared with the heating system with electric underfloor heating.…”

Section: Figurementioning

confidence: 99%

Validation of a Heating System in the Farrowing House Using a CFD Approach

et al. 2018

View full text Add to dashboard Cite

The current heating system for piglets in the farrowing usually uses incandescent lamps and, in some cases, heated floors with electric resistances, which in most cases generates a high energy cost. Thus, the implantation of systems that use renewable energies in the heating of piglets can allow the thermal comfort of the animals without reducing the productive development. The objective of this research was to evaluate a computer model in Computational Fluid Dynamics (CFD), which predicts surface temperature in the heating system of a farrowing house. The study was conducted during the summer season on the swine sector of Federal University of Lavras, Brazil. For this study, a prototype solar heater using alternative materials (ASWH) was developed and compared with a conventional solar water heater (CSWH). Two floors were built of cement to test both heating systems and four thermocouple sensors (K type) with digital display were used in each system to test and evaluate the heating efficiency. Based on the results, the average surface temperature in the ASWH and the CSWH treatments was 27.9 ± 2.6 °C and 27.1 ± 1.9 °C, respectively. Therefore, the experimental data showed no significant differences from the data obtained by the model, enabling the conclusion that it is suitable for predicting the thermal conditions of this type of heating system and could be used in swine factories to predict energy consumption. Thus, this computational model can be used as a useful tool for the design and selection of heating systems used in swine maternity systems.

show abstract

“…is type of concrete is a new type of geotechnical material developed in recent years and possesses the advantages of low weight, stable performance, convenient construction, and so forth. [4][5][6][7]. e applications of cast-in-situ foamed concrete have expanded considerably in civil engineering as a result of scientific and technical advances in its production.…”

Section: Introductionmentioning

confidence: 99%

Study on the Heat of Hydration and Strength Development of Cast‐In‐Situ Foamed Concrete

Zhao

Han

et al. 2020

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

is study aims to investigate the relationship between the heat of hydration and the strength development of cast-in-situ foamed concrete. First, indoor model tests are conducted to determine the effects of the casting density and the fly ash content on the hydration heat of foamed concrete in semiadiabatic conditions. Second, compression tests are carried out to evaluate the development of the compressive strength with the curing time under standard curing conditions and temperature matched curing conditions. ird, the hydration heat development of the foamed concrete is tested in four projects. e results showed that the peak temperature, the maximum temperature change rate, and the maximum temperature difference increased with the increase in the casting density at different positions in the foamed concrete. For the same casting density of the foamed concrete, the peak temperature, the maximum temperature change rate, and the maximum temperature difference decreased with the increase in the fly ash content. For the foamed concrete without the admixture, the early strength was significantly higher under temperature matched curing conditions than under standard curing conditions, but the temperature matched curing conditions had a clear inhibitory effect on the strength of the foamed concrete. e strengths during the early stage and the later stage were both improved under temperature matched curing conditions after adding the fly ash, and the greater the fly ash content, the larger the effect. e maximum temperature increments were higher in the indoor model test than in the field tests for the same casting density. Reasonable cooling measures and the addition of fly ash decreased the maximum temperature increments and increased the corresponding casting times.

show abstract

Thermal Performance Analysis of Reinforced Concrete Floor Structure with Radiant Floor Heating System in Apartment Housing

Cited by 14 publications

References 10 publications

The Impact of Chain Extender on the Properties of Polyurethane Foam Based on Rapeseed Oil Polyol Obtained via Chemo–enzymatic Route

The Impact of Chain Extender on the Properties of Polyurethane Foam Based on Rapeseed Oil Polyol Obtained via Chemo–enzymatic Route

Validation of a Heating System in the Farrowing House Using a CFD Approach

Study on the Heat of Hydration and Strength Development of Cast‐In‐Situ Foamed Concrete

Contact Info

Product

Resources

About