Application range of thermally activated building systems tabs

Lehmann, B.; Dorer, Viktor; Koschenz, Markus

doi:10.1016/j.enbuild.2006.09.009

Cited by 142 publications

(74 citation statements)

References 2 publications

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“…Lehmann et. al [14] presented application range and functionality of thermalactivated building systems (TABS) with supply water temperature of about 19°C.…”

Section: Introductionmentioning

confidence: 99%

Energy saving potential of a two-pipe system for simultaneous heating and cooling of office buildings

Maccarini

Wetter

Afshari

et al. 2017

Energy and Buildings

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This paper analyzes the performance of a novel two-pipe system that operates one water loop to simultaneously provide space heating and cooling with a water supply temperature of around 22°C.To analyze the energy performance of the system, a simulation-based research was conducted. The two-pipe system was modelled using the equation-based Modelica modeling language in Dymola.A typical office building model was considered as the case study. Simulations were run for two construction sets of the building envelope and two conditions related to inter-zone air flows. To calculate energy savings, a conventional four-pipe system was modelled and used for comparison.The conventional system presented two separated water loops for heating and cooling with supply temperatures of 45°C and 14°C, respectively. Simulation results showed that the two-pipe system was able to use less energy than the four-pipe system thanks to three effects: useful heat transfer from warm to cold zones, higher free cooling potential and higher efficiency of the heat pump. In particular, the two-pipe system used approximately between 12% and 18% less total annual primary energy than the four-pipe system, depending on the simulation case considered. KeywordsEnergy saving, HVAC systems, low-exergy, simulation, Modelica, active beams

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“…Lehmann et. al [14] presented application range and functionality of thermalactivated building systems (TABS) with supply water temperature of about 19°C.…”

Section: Introductionmentioning

confidence: 99%

Energy saving potential of a two-pipe system for simultaneous heating and cooling of office buildings

Maccarini

Wetter

Afshari

et al. 2017

Energy and Buildings

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“…The literature [7,17,18] reports night time operation of the circulation pumps as an optimal control strategy for TABS, possibly supplemented with other specific control parameters. In the case of cooling, during night time heat is rejected from the TABS and during day time, the resulting lower temperature of the TABS is used to temper the room temperature.…”

Section: Simulation Casesmentioning

confidence: 99%

“…To this end, water tubes are integrated in concrete slabs, serving as a thermal energy storage for both heating and cooling. The result is a flattening of the peaks in energy demand, which in turn requires lower installed power for heating and cooling [7,8]. TABS are characterized by inconstant room air temperature which floats in between the comfort limits.…”

Section: Introductionmentioning

confidence: 99%

Efficiently produced heat and cold is squandered by inappropriate control strategies: A case study

Sourbron

Herdt

Reet

et al. 2009

Energy and Buildings

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“…However, in typical offices the transitional period between winter and summer is the most sensitive to user interference [20]. In many research studies [17,21,22] it has been mentioned that determining the proper heat transfer coefficient and the cooling capacity of the cooled ceiling systems is of crucial importance, especially in connection with solar gains.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Various Retrofitting Concepts of Building Envelope for Offices Equipped with Large Radiant Ceiling Panels by Dynamic Simulations

et al. 2015

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Abstract:In order to achieve significant savings in energy and an improved level of thermal comfort in retrofitted existing buildings, specific retrofitting concepts that combine new technologies and design need to be developed and implemented. Large radiant surfaces systems are now among the most promising future technologies to be used both in retrofitted and in new low-energy buildings. These kinds of systems have been the topic of several studies dealing with thermal comfort and energy utilization, but some specific issues concerning their possible use in various concepts for retrofitting are still poorly understood. In the present paper, some results of dynamic simulations, with the transient system simulation tool (TRNSYS) model, of the retrofitted offices equipped with radiant ceiling panels are presented and thoroughly analysed. Based on a precise comparison of the results of these simulations with actual measurements in the offices, certain input data for the model were added, so that the model was consequently validated. The model was then applied to the evaluation of various concepts of building envelopes for office retrofitting. By means of dynamic simulations of indoor environment it was possible to determine the benefits and OPEN ACCESSSustainability 2015, 7 13170 limitations of individual retrofitting concepts. Some specific parameters, which are relevant to these concepts, were also identified.

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Application range of thermally activated building systems tabs

Cited by 142 publications

References 2 publications

Energy saving potential of a two-pipe system for simultaneous heating and cooling of office buildings

Energy saving potential of a two-pipe system for simultaneous heating and cooling of office buildings

Efficiently produced heat and cold is squandered by inappropriate control strategies: A case study

Evaluation of Various Retrofitting Concepts of Building Envelope for Offices Equipped with Large Radiant Ceiling Panels by Dynamic Simulations

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