Modelling The Energy Performance Of Night-Time Ventilation Using The Quasi-Steady state Calculation Method

Jerome Le Dreau, Per Heiselberg, Rasmus Lund Jensen, Ayser Dawod Selman

Publikation: Bidrag til bog/antologi/rapport/konference proceedingKonferenceartikel i proceedingForskningpeer review

Resumé

Many European countries assess the heating and cooling needs of buildings using the quasi-steady state calculation method described in EN ISO 13790. The energy need is calculated by establishing the monthly balance of heat losses and heat gains, and the dynamic effects are taken into consideration by introducing correlation factors. The difficulty of evaluating night-time ventilation with such a method comes from the strong influence of the dynamic effects. In this paper, two different calculation methods for modeling night-time ventilation have been developed and tested: one is based on correcting the convective heat transfer by ventilation using the factor Cve (method proposed in the standard), and the other one introduces an adjustment factor Cy on the relative heat gains.

288 simulations of a typical Danish office building have been performed using different boundary conditions: level of thermal mass, level of insulation,
orientation, internal heat loads, duration and air change rate of night-time ventilation. For both methods, the derived correction factors are highly dependent on the thermal mass of the building. An influence of the period of activation of night-time ventilation has also been observed. Correlations have been developed and an improvement o f the accuracy has been observed: the uncertainty on the annual energy consumption obtained with adjustment factor has been decreased from around l O % down to 5%.

OriginalsprogEngelsk
TitelBuilding Simulation 2013 : BS2013
RedaktørerEtienne Wurtz
Antal sider8
ForlagThe International Building Performance Simulation Association Conference
Publikationsdato2013
Sider3307-3313
ISBN (Elektronisk)978-2-7466-6294-0
StatusUdgivet - 2013
Begivenhed13th International Conference of the International Building Performance Simulation Association: Building simulation 2013 - Chambéry, Frankrig
Varighed: 25 aug. 201328 aug. 2013
Konferencens nummer: 13
http://www.bs2013.fr/

Konference

Konference13th International Conference of the International Building Performance Simulation Association
Nummer13
LandFrankrig
ByChambéry
Periode25/08/201328/08/2013
Internetadresse

Fingerprint

Ventilation
Office buildings
Thermal load
Heat losses
Insulation
Energy utilization
Chemical activation
Boundary conditions
Heat transfer
Cooling
Heating
Hot Temperature
Air

Bibliografisk note

Publiceret på en USB

Emneord

  • Energy Perfonnance of Buildings Directive
  • EPBD
  • Calculation Methods
  • EN ISO 13790
  • Quasi-Steady State
  • Heat Loss
  • Heat Gains
  • Ventilation

Citer dette

Le Dreau, J., Heiselberg, P., Jensen, R. L., & Selman, A. D. (2013). Modelling The Energy Performance Of Night-Time Ventilation Using The Quasi-Steady state Calculation Method. I E. Wurtz (red.), Building Simulation 2013: BS2013 (s. 3307-3313). The International Building Performance Simulation Association Conference.
Le Dreau, Jerome ; Heiselberg, Per ; Jensen, Rasmus Lund ; Selman, Ayser Dawod. / Modelling The Energy Performance Of Night-Time Ventilation Using The Quasi-Steady state Calculation Method. Building Simulation 2013: BS2013. red. / Etienne Wurtz. The International Building Performance Simulation Association Conference, 2013. s. 3307-3313
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title = "Modelling The Energy Performance Of Night-Time Ventilation Using The Quasi-Steady state Calculation Method",
abstract = "Many European countries assess the heating and cooling needs of buildings using the quasi-steady state calculation method described in EN ISO 13790. The energy need is calculated by establishing the monthly balance of heat losses and heat gains, and the dynamic effects are taken into consideration by introducing correlation factors. The difficulty of evaluating night-time ventilation with such a method comes from the strong influence of the dynamic effects. In this paper, two different calculation methods for modeling night-time ventilation have been developed and tested: one is based on correcting the convective heat transfer by ventilation using the factor Cve (method proposed in the standard), and the other one introduces an adjustment factor Cy on the relative heat gains. 288 simulations of a typical Danish office building have been performed using different boundary conditions: level of thermal mass, level of insulation, orientation, internal heat loads, duration and air change rate of night-time ventilation. For both methods, the derived correction factors are highly dependent on the thermal mass of the building. An influence of the period of activation of night-time ventilation has also been observed. Correlations have been developed and an improvement o f the accuracy has been observed: the uncertainty on the annual energy consumption obtained with adjustment factor has been decreased from around l O {\%} down to 5{\%}.",
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Le Dreau, J, Heiselberg, P, Jensen, RL & Selman, AD 2013, Modelling The Energy Performance Of Night-Time Ventilation Using The Quasi-Steady state Calculation Method. i E Wurtz (red.), Building Simulation 2013: BS2013. The International Building Performance Simulation Association Conference, s. 3307-3313, 13th International Conference of the International Building Performance Simulation Association, Chambéry, Frankrig, 25/08/2013.

Modelling The Energy Performance Of Night-Time Ventilation Using The Quasi-Steady state Calculation Method. / Le Dreau, Jerome; Heiselberg, Per; Jensen, Rasmus Lund; Selman, Ayser Dawod.

Building Simulation 2013: BS2013. red. / Etienne Wurtz. The International Building Performance Simulation Association Conference, 2013. s. 3307-3313.

Publikation: Bidrag til bog/antologi/rapport/konference proceedingKonferenceartikel i proceedingForskningpeer review

TY - GEN

T1 - Modelling The Energy Performance Of Night-Time Ventilation Using The Quasi-Steady state Calculation Method

AU - Le Dreau, Jerome

AU - Heiselberg, Per

AU - Jensen, Rasmus Lund

AU - Selman, Ayser Dawod

N1 - Publicized on a USB

PY - 2013

Y1 - 2013

N2 - Many European countries assess the heating and cooling needs of buildings using the quasi-steady state calculation method described in EN ISO 13790. The energy need is calculated by establishing the monthly balance of heat losses and heat gains, and the dynamic effects are taken into consideration by introducing correlation factors. The difficulty of evaluating night-time ventilation with such a method comes from the strong influence of the dynamic effects. In this paper, two different calculation methods for modeling night-time ventilation have been developed and tested: one is based on correcting the convective heat transfer by ventilation using the factor Cve (method proposed in the standard), and the other one introduces an adjustment factor Cy on the relative heat gains. 288 simulations of a typical Danish office building have been performed using different boundary conditions: level of thermal mass, level of insulation, orientation, internal heat loads, duration and air change rate of night-time ventilation. For both methods, the derived correction factors are highly dependent on the thermal mass of the building. An influence of the period of activation of night-time ventilation has also been observed. Correlations have been developed and an improvement o f the accuracy has been observed: the uncertainty on the annual energy consumption obtained with adjustment factor has been decreased from around l O % down to 5%.

AB - Many European countries assess the heating and cooling needs of buildings using the quasi-steady state calculation method described in EN ISO 13790. The energy need is calculated by establishing the monthly balance of heat losses and heat gains, and the dynamic effects are taken into consideration by introducing correlation factors. The difficulty of evaluating night-time ventilation with such a method comes from the strong influence of the dynamic effects. In this paper, two different calculation methods for modeling night-time ventilation have been developed and tested: one is based on correcting the convective heat transfer by ventilation using the factor Cve (method proposed in the standard), and the other one introduces an adjustment factor Cy on the relative heat gains. 288 simulations of a typical Danish office building have been performed using different boundary conditions: level of thermal mass, level of insulation, orientation, internal heat loads, duration and air change rate of night-time ventilation. For both methods, the derived correction factors are highly dependent on the thermal mass of the building. An influence of the period of activation of night-time ventilation has also been observed. Correlations have been developed and an improvement o f the accuracy has been observed: the uncertainty on the annual energy consumption obtained with adjustment factor has been decreased from around l O % down to 5%.

KW - Energy Perfonnance of Buildings Directive

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KW - Calculation Methods

KW - EN ISO 13790

KW - Quasi-Steady State

KW - Heat Loss

KW - Heat Gains

KW - Ventilation

KW - Energy Perfonnance of Buildings Directive

KW - EPBD

KW - Calculation Methods

KW - EN ISO 13790

KW - Quasi-Steady State

KW - Heat Loss

KW - Heat Gains

KW - Ventilation

M3 - Article in proceeding

SP - 3307

EP - 3313

BT - Building Simulation 2013

A2 - Wurtz, Etienne

PB - The International Building Performance Simulation Association Conference

ER -

Le Dreau J, Heiselberg P, Jensen RL, Selman AD. Modelling The Energy Performance Of Night-Time Ventilation Using The Quasi-Steady state Calculation Method. I Wurtz E, red., Building Simulation 2013: BS2013. The International Building Performance Simulation Association Conference. 2013. s. 3307-3313