This page has only limited features, please log in for full access.

Unclaimed
Lars Schiøtt Sørensen
Danish Building Research Institute

Basic Info

Basic Info is private.

Honors and Awards

The user has no records in this section


Career Timeline

The user has no records in this section.


Short Biography

The user biography is not available.
Following
Followers
Co Authors
The list of users this user is following is empty.
Following: 0 users

Feed

Journal article
Published: 01 April 2018 in Chemosphere
Reads 0
Downloads 0

Organophosphate esters (OPEs) are used as flame retardants, plasticizers, and as hydraulic fluids. They are present in indoor environments in high concentrations compared with other flame retardants, and human exposure is ubiquitous. In this study we provide data for estimating dermal uptake for eight OPEs and ranking in OPEs risk assessment. Dermal uptake and percutaneous penetration of the OPEs were studied in a Franz diffusion cell system using human skin dosed with a mixture of OPEs in an ethanol:toluene (4:1) solution. Large variation in penetration profiles was observed between the OPEs. The chlorinated OPEs tris(2-chloroisopropyl) phosphate (TCIPP), and in particular tris(2-chloroethyl) phosphate (TCEP), penetrated the skin quite rapidly while tris(1,3-dichlor-2-propyl) phosphate (TDCIPP) and triphenyl phosphate (TPHP) tended to build up in the skin tissue and only smaller amounts permeated through the skin. For tris(isobutyl) phosphate (TIBP), tris(n-butyl) phosphate (TNBP), and tris(methylphenyl) phosphate (TMPP) the mass balance was not stable over time indicating possible degradation during the experimental period of 72 h. The rates at which OPEs permeated through the skin decreased in the order TCEP > TCIPP ≥ TBOEP > TIBP ≥ TNBP > TDCIPP > TPHP > TMPP. Generally, the permeation coefficient, k, decreased with increasing log K, whereas lag time and skin deposition increased with log K. The present data indicate that dermal uptake is a non-negligible human exposure pathway for the majority of the studied OPEs.

ACS Style

Marie Frederiksen; Heather M. Stapleton; Katrin Vorkamp; Thomas F. Webster; Niels Martin Jensen; Jens Ahm Sørensen; Flemming Nielsen; Lisbeth E. Knudsen; Lars Schiøtt Sørensen; Per Axel Clausen; Jesper B. Nielsen. Dermal uptake and percutaneous penetration of organophosphate esters in a human skin ex vivo model. Chemosphere 2018, 197, 185 -192.

AMA Style

Marie Frederiksen, Heather M. Stapleton, Katrin Vorkamp, Thomas F. Webster, Niels Martin Jensen, Jens Ahm Sørensen, Flemming Nielsen, Lisbeth E. Knudsen, Lars Schiøtt Sørensen, Per Axel Clausen, Jesper B. Nielsen. Dermal uptake and percutaneous penetration of organophosphate esters in a human skin ex vivo model. Chemosphere. 2018; 197 ():185-192.

Chicago/Turabian Style

Marie Frederiksen; Heather M. Stapleton; Katrin Vorkamp; Thomas F. Webster; Niels Martin Jensen; Jens Ahm Sørensen; Flemming Nielsen; Lisbeth E. Knudsen; Lars Schiøtt Sørensen; Per Axel Clausen; Jesper B. Nielsen. 2018. "Dermal uptake and percutaneous penetration of organophosphate esters in a human skin ex vivo model." Chemosphere 197, no. : 185-192.

Journal article
Published: 01 October 2017 in Energy Procedia
Reads 0
Downloads 0
ACS Style

Lies Vanhoutteghem; Martin Morelli; Lars Schiøtt Sørensen. Can crawl space temperature and moisture conditions be calculated with a whole-building hygrothermal simulation tool? Energy Procedia 2017, 132, 688 -693.

AMA Style

Lies Vanhoutteghem, Martin Morelli, Lars Schiøtt Sørensen. Can crawl space temperature and moisture conditions be calculated with a whole-building hygrothermal simulation tool? Energy Procedia. 2017; 132 ():688-693.

Chicago/Turabian Style

Lies Vanhoutteghem; Martin Morelli; Lars Schiøtt Sørensen. 2017. "Can crawl space temperature and moisture conditions be calculated with a whole-building hygrothermal simulation tool?" Energy Procedia 132, no. : 688-693.

Journal article
Published: 11 September 2017 in Journal of Structural Fire Engineering
Reads 0
Downloads 0

Purpose Prefabricated extruded hollow-core slabs are preferred building components for floor structures in several countries. It is therefore important to be able to document the fire resistance of these slabs proving fulfilment of standard fire resistance requirements of 60 and 120 min found in most national building regulations. The paper aims to present a detailed analysis of the mechanisms responsible for the loss of load-bearing capacity of hollow-core slabs when exposed to fire. Design/methodology/approach Furthermore, it compares theoretical calculation and assessment according to the structural codes with data derived from a standard fire test and from a thorough examination of the comprehensive test documentation available on fire exposed hollow-core slabs. Findings Mechanisms for loss of load-bearing capacity are clarified, and evidence of the fire resistance is found. Originality value For the first time, the mechanisms responsible for loss of load-bearing capacity are identified, and test results and calculation approach are for the first time applied in accordance with each other for assessment of fire resistance of the structure.

ACS Style

Kristian Hertz; Luisa Giuliani; Lars Schiøtt Sørensen. Fire resistance of extruded hollow-core slabs. Journal of Structural Fire Engineering 2017, 8, 324 -336.

AMA Style

Kristian Hertz, Luisa Giuliani, Lars Schiøtt Sørensen. Fire resistance of extruded hollow-core slabs. Journal of Structural Fire Engineering. 2017; 8 (3):324-336.

Chicago/Turabian Style

Kristian Hertz; Luisa Giuliani; Lars Schiøtt Sørensen. 2017. "Fire resistance of extruded hollow-core slabs." Journal of Structural Fire Engineering 8, no. 3: 324-336.

Journal article
Published: 16 August 2016 in Chemosphere
Reads 0
Downloads 0

The dermal uptake and percutaneous penetration of ten organic flame retardants was measured using an ex vivo human skin model. The studied compounds were DBDPE, BTBPE, TBP-DBPE, EH-TBB, BEH-TEBP, α, β and γ-HBCDD as well as syn- and anti-DDC-CO. Little or none of the applied flame retardants was recovered in either type of the receptor fluids used (physiological and worst-case). However, significant fractions were recovered in the skin depot, particularly in the upper skin layers. The primary effect of the worst-case receptor fluid was deeper penetration into the skin. The recovered mass was used to calculate lower- and upper-bound permeability coefficients kp. Despite large structural variation between the studied compounds, a clear, significant decreasing trend of kp was observed with increasing log Kow. The results indicate that the dermis may provide a significant barrier for these highly lipophilic compounds. However, based on our results, dermal uptake should be considered in exposure assessments, though it may proceed in a time-lagged manner compared to less hydrophobic compounds.

ACS Style

Marie Frederiksen; Katrin Vorkamp; Niels Martin Jensen; Jens Ahm Sørensen; Lisbeth E. Knudsen; Lars Schiøtt Sørensen; Thomas F. Webster; Jesper B. Nielsen. Dermal uptake and percutaneous penetration of ten flame retardants in a human skin ex vivo model. Chemosphere 2016, 162, 308 -314.

AMA Style

Marie Frederiksen, Katrin Vorkamp, Niels Martin Jensen, Jens Ahm Sørensen, Lisbeth E. Knudsen, Lars Schiøtt Sørensen, Thomas F. Webster, Jesper B. Nielsen. Dermal uptake and percutaneous penetration of ten flame retardants in a human skin ex vivo model. Chemosphere. 2016; 162 ():308-314.

Chicago/Turabian Style

Marie Frederiksen; Katrin Vorkamp; Niels Martin Jensen; Jens Ahm Sørensen; Lisbeth E. Knudsen; Lars Schiøtt Sørensen; Thomas F. Webster; Jesper B. Nielsen. 2016. "Dermal uptake and percutaneous penetration of ten flame retardants in a human skin ex vivo model." Chemosphere 162, no. : 308-314.

Journal article
Published: 28 June 2015 in Journal of Civil Engineering and Architecture
Reads 0
Downloads 0
ACS Style

Lars Schiott Sorensen; Anker Nielsen. Sensitivity Analysis of a Simplified Fire Dynamic Model. Journal of Civil Engineering and Architecture 2015, 9, 1 .

AMA Style

Lars Schiott Sorensen, Anker Nielsen. Sensitivity Analysis of a Simplified Fire Dynamic Model. Journal of Civil Engineering and Architecture. 2015; 9 (6):1.

Chicago/Turabian Style

Lars Schiott Sorensen; Anker Nielsen. 2015. "Sensitivity Analysis of a Simplified Fire Dynamic Model." Journal of Civil Engineering and Architecture 9, no. 6: 1.

Journal article
Published: 21 August 2013 in Sustainability
Reads 0
Downloads 0

Global energy efficiency can be obtained in two ordinary ways. One way is to improve the energy production and supply side, and the other way is, in general, to reduce the consumption of energy in society. This paper has focus on the latter and especially the consumption of energy for heating and cooling our houses. There is a huge energy-saving potential in this area for reducing both the global climate problems as well as economy challenges. Heating of buildings in Denmark accounts for approximately 40% of the entire national energy consumption. For this reason, a reduction of heat losses from building envelopes are of great importance in order to reach the Bologna CO2 emission reduction targets. Upgrading of the energy performance of buildings is a topic of huge global interest these years. Not only heating in the temperate and arctic regions are important, but also air conditioning and mechanical ventilation in the “warm countries” contribute to an enormous energy consumption and corresponding CO2 emission. In order to establish the best basis for upgrading the energy performance, it is important to make measurements of the heat losses at different places on a building facade, in order to optimize the energy performance. This paper presents a method for measuring the heat loss by utilizing a U-value meter. The U-value meter measures the heat transfer in the unit W/Km2 and has been used in several projects to upgrade the energy performance in temperate regions. The U-value meter was also utilized in an EUDP (Energy Technological Development and Demonstration Program) focusing on renovation of houses from the 1960s and 1970s.

ACS Style

Lars Schiøtt Sørensen. Heat Transmission Coefficient Measurements in Buildings Utilizing a Heat Loss Measuring Device. Sustainability 2013, 5, 3601 -3614.

AMA Style

Lars Schiøtt Sørensen. Heat Transmission Coefficient Measurements in Buildings Utilizing a Heat Loss Measuring Device. Sustainability. 2013; 5 (8):3601-3614.

Chicago/Turabian Style

Lars Schiøtt Sørensen. 2013. "Heat Transmission Coefficient Measurements in Buildings Utilizing a Heat Loss Measuring Device." Sustainability 5, no. 8: 3601-3614.

Conference paper
Published: 01 November 2012 in Proceedings of The 2nd World Sustainability Forum
Reads 0
Downloads 0

There exist two ordinary ways to obtain global energy efficiency. One way is to make improvements on the energy production and supply side, and the other way is, in general, to reduce the consume of energy in the society. This paper has focus on the latter and especially the consume of energy for heating up, and cooling down our houses. There is a huge energy saving potential on this area reducing both the World climate problems and economy challenges as well. Heating of buildings in Denmark counts for approximately 40% of the entire national energy consume. Of this reason a reduction of heat losses from building envelopes are of great impor­tance in order to reach the Bologna CO2-emission reduction goals. Energy renovation of buildings is a topic of huge focus around the world these years. Not only expenses for heating in the tempered and arctic regions are of importance, but also expenses to ACMV in the "warm countries" contribute to an enormous energy consumption and corresponding CO2 emission. In order to establish the best basis for energy renovation, it is important to have measures of the heat losses on a building façade, for optimizing the energy renovation. This paper will present a new method for measuring the heat loss by utilizing a so called U-value Meter [Sørensen 2010]. The U-value Meter is a heat loss measuring device and has been used in several energy renovation projects in tempered regions and is now planned to be utilized in the tropics for measuring the heat penetration through facades with the aim to reduce the costs to AC. The paper will introduce a common project between NUS (National University of Singapore), AAU (Aalborg University) and HT-Meter, the latter as the U-value Meter developer company. In the project we will measure the heat transfer in the unit W/Km2 through different facade elements, such as outer walls, entrance doors, windows and roofs on selected buildings. The results will be analysed as basic for improvements of the envelope. A developing of new energy renovation systems and energy renovation principles is expected to be the outcome of the project. Furthermore this paper present results from already conducted heat loss measurements in the tempered regions and discusses the U-value Meter device aiming for improvements.

ACS Style

Lars Sørensen. Energy Reduction in Buildings in Tempered and Tropic Regions Utilizing a Heat Loss Measuring Device (U-value Meter). Proceedings of The 2nd World Sustainability Forum 2012, 1 .

AMA Style

Lars Sørensen. Energy Reduction in Buildings in Tempered and Tropic Regions Utilizing a Heat Loss Measuring Device (U-value Meter). Proceedings of The 2nd World Sustainability Forum. 2012; ():1.

Chicago/Turabian Style

Lars Sørensen. 2012. "Energy Reduction in Buildings in Tempered and Tropic Regions Utilizing a Heat Loss Measuring Device (U-value Meter)." Proceedings of The 2nd World Sustainability Forum , no. : 1.

Proceedings article
Published: 05 August 2009 in Information Processing in Civil and Structural Engineering Design
Reads 0
Downloads 0
ACS Style

Lars Schiøtt Sørensen; T. Andersen. The Current State of Computing in Building Design and Construction: A Detailed Survey. Information Processing in Civil and Structural Engineering Design 2009, 1 .

AMA Style

Lars Schiøtt Sørensen, T. Andersen. The Current State of Computing in Building Design and Construction: A Detailed Survey. Information Processing in Civil and Structural Engineering Design. 2009; ():1.

Chicago/Turabian Style

Lars Schiøtt Sørensen; T. Andersen. 2009. "The Current State of Computing in Building Design and Construction: A Detailed Survey." Information Processing in Civil and Structural Engineering Design , no. : 1.

Journal article
Published: 01 July 2005 in Fire Safety Journal
Reads 0
Downloads 0
ACS Style

K.D. Hertz; Lars Schiøtt Sørensen. Test method for spalling of fire exposed concrete. Fire Safety Journal 2005, 40, 466 -476.

AMA Style

K.D. Hertz, Lars Schiøtt Sørensen. Test method for spalling of fire exposed concrete. Fire Safety Journal. 2005; 40 (5):466-476.

Chicago/Turabian Style

K.D. Hertz; Lars Schiøtt Sørensen. 2005. "Test method for spalling of fire exposed concrete." Fire Safety Journal 40, no. 5: 466-476.