Low temperature radiator heating distribution and emission efficiency in residential buildings

Maivel, Mikk; Kurnitski, Jarek

doi:10.1016/j.enbuild.2013.10.030

Cited by 61 publications

(28 citation statements)

References 8 publications

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“…Very old study [5] reports additional emission loss up to 5% of the heat emission of radiator in old buildings with poor insulation and less than 1% in new buildings with good insulation. Recent heating system simulation study showed that simulated losses in low-energy building were significantly lower compared to tabulated values of the standard [6]. Partly based on these results, a new updated prEN standard has more alternatives for considering low energy buildings.…”

Section: Introductionmentioning

confidence: 88%

Radiator and floor heating operative temperature and temperature variation corrections for EN 15316-2 heat emission standard

Maivel

Kurnitski

2015

Energy and Buildings

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Section: Introductionmentioning

confidence: 88%

Radiator and floor heating operative temperature and temperature variation corrections for EN 15316-2 heat emission standard

Maivel

Kurnitski

2015

Energy and Buildings

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“…Traditionally, radiators are operated with high temperature water supply (75-90 °C) (Boerstra 2000). In comparison, low temperature ventilation-radiators operate between 45-35 °C and are more energy efficient in comparison to the conventional radiator (Boerstra and Holmberg 2009;Ploskić and Holmberg 2013;Maivel and Kurnitski 2014). Because of the enhanced convection heat transfer in the radiator, heating efficiency is improved significantly.…”

Section: Introductionmentioning

confidence: 99%

Laboratory study of subjective perceptions to low temperature heating systems with exhaust ventilation in Nordic countries

Jin

Simone

Olesen

et al. 2017

Science and Technology for the Built Environment

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PhD, is a Researcher. Bjarne W. Olesen, PhD, Member ASHRAE, is a Professor. Sture K. M.Holmberg, PhD, is a Professor. Eleftherios Bourdakis is a PhD Candidate.Given the global trends of rising energy demand and the increasing utilization of low-grade renewable energy, low temperature heating systems can play key roles in improving building energy efficiency while providing a comfortable indoor environment. To meet the need to retrofit existing buildings in Nordic countries for greater energy efficiency, this study focused on human subjects´ thermal sensation, thermal comfort, thermal acceptability, draft acceptability and perceived air quality when three low temperature heating systems were used: conventional radiator, ventilation radiator or floor heating with exhaust ventilation. Human subject tests were carried out in the climate chamber at the Technical University of Denmark. In total, 24 human subjects, 12 females and 12 males participated in the tests during the winter season. The results ACCEPTED MANUSCRIPT ACCEPTED MANUSCRIPT 2show that no significant differences in thermal sensation and thermal comfort between the three heating systems. Ventilation radiator promised a comfortable indoor environment with a decreased water supply temperature and floor heating with exhaust ventilation can provide a basic thermal comfort level. Thermal acceptability and draft acceptability show variations in different heating systems. Gender has significant influences on thermal sensation, draft acceptability and preference of clo values. Personal thermal preference is observed between male and female. The male prefer to dress lighter than the female but both can get the same thermal comfort level. It is concluded that low temperature heating systems using exhaust air ventilation are a potentially solution when buildings are being retrofitted for improved energy efficiency and comfort of the occupants.

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“…By reducing the heating system temperatures it is possible to increase the efficiency of heat production from solar collectors, heat pumps, and condensing boilers. Furthermore the heat loss from the distribution systems inside both new and existing buildings is reduced [2,3]. The highest heating system efficiencies are obtained when both supply and return temperatures are as low as possible.…”

Section: Introductionmentioning

confidence: 99%

“…Recent studies have shown how new houses can be designed with a low-temperature heating system supplied by either low-temperature district heating [5], a heat pump [6], or a boiler [2]. Less focus has been put on the heating systems in existing houses.…”

Section: Introductionmentioning

confidence: 99%

Case study of low-temperature heating in an existing single-family house—A test of methods for simulation of heating system temperatures

Østergaard

Svendsen

2016

Energy and Buildings

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Abstract:Low-temperature heating provides an efficient way of heating our buildings. To obtain a high efficiency it is important that the heating systems in the buildings are operated with both low supply and return temperatures. This study set out to investigate how typical assumptions in the modelling of heat emissions from existing hydraulic radiators affects the heating system return temperatures calculated in a building

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Low temperature radiator heating distribution and emission efficiency in residential buildings

Cited by 61 publications

References 8 publications

Radiator and floor heating operative temperature and temperature variation corrections for EN 15316-2 heat emission standard

Radiator and floor heating operative temperature and temperature variation corrections for EN 15316-2 heat emission standard

Laboratory study of subjective perceptions to low temperature heating systems with exhaust ventilation in Nordic countries

Case study of low-temperature heating in an existing single-family house—A test of methods for simulation of heating system temperatures

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