Simplified dynamic model for heat input and output of heat storing stoves

Novaković

2013

Energy and Buildings

Wood stoves are attractive for the space-heating (SH) of passive houses. Nevertheless, there are still questions about their integration. Firstly, the power oversizing of the current stoves and their long operating time may lead to unacceptable overheating. Secondly, it is also unclear how one stove can ensure the thermal comfort in the entire building. The paper investigates these aspects using detailed dynamic simulations (TRNSYS) applied to a detached house in Belgium. An 8 kW stove is assumed to be representative of the lowest available powers in the market. Results confirm that a large power modulation is important to prevent overheating. Opening the internal doors, a high building thermal mass and a heat emission dominated by radiation also reduce the overheating risk, but to a smaller extent. Besides, a single stove cannot enforce the thermal comfort during design weather conditions: * Corresponding author

Section: Log Stove Modelmentioning

confidence: 99%

On the proper integration of wood stoves in passive houses: Investigation using detailed dynamic simulations

Novaković

2013

Energy and Buildings

“…It should be considered as a batch process [35]. A specific software package developed by SINTEF Energy Research [13] is used to establish the time profile of the log-combustion power, P c .…”

Section: Stove Model and Parametersmentioning

confidence: 99%

On the proper integration of wood stoves in passive houses under cold climates

Novaković

2014

Energy and Buildings

The space-heating (SH) of residential buildings using a wood stove is an attractive solution. The way to properly integrate stoves in passive houses (PH) is still in question: current nominal powers are generally oversized compared to the PH needs (i.e. overheating risk) and it is not well understood how one stove can contribute to the SH of the entire building during a heating season. This question has already been addressed for the temperate climate of Belgium in a previous paper. The present work investigates cold climates also using a larger range of stove parameters. This is done using detailed dynamic simulations (TRNSYS) on a typical Norwegian single-family house typology.Using a large sensitivity analysis, recommendations to prevent overheating are given with a distinction between pellet and log stoves. Results also show that the overheating risk is somehow comparable between cold climates. On * Corresponding author

“…Therefore, the dynamics of the Post-print : Journal of Building Performance Simulation, Volume 9, Issue 6, 2016, p. 663-679 combustion cycle should be captured accurately. Saastamoinen et al (2005) and Tuomaala, Simonson, and Piira (2002) introduced models for the heat input and the heat transfer through the envelope of heat-storing stoves. Likewise, Skreiberg (2002) developed a semi-empirical model for the time profile of P c , see Figure 2, as well as a one-dimensional heat transfer model for lightweight stove envelopes.…”

Section: Introductionmentioning

confidence: 99%

Simple modelling procedure for the indoor thermal environment of highly insulated buildings heated by wood stoves

Journal of Building Performance Simulation

2016

and Technology (NTNU), Trondheim, Norway Kolbjørn Hejes vei 1b, Norway, laurent.georges@ntnu Post-print : Journal of Building Performance Simulation, Volume 9, Issue 6, 2016, p. 663-679 Simple Modelling Procedure for the Indoor Thermal Environment of Highly Insulated Buildings Heated by Wood StovesSpace heating using wood stoves is a popular solution in many European countries. The nominal power of the state-of-the-art stoves is oversized compared to the needs of highly insulated buildings, leading to a risk of overheating. A modelling procedure is here developed in order to investigate the indoor thermal environment generated by wood stoves in such buildings. This procedure is kept simple to perform all-year detailed dynamic simulations (e.g. using TRNSYS) at an acceptable computational cost.A specific experimental setup has been developed for validation, essentially regarding the interaction between the stove and the building. The largest source of error appears to be the thermal stratification in the room where the stove is placed. The experiments prove that the model gives a fair insight into the global thermal comfort. Therefore, it is possible to investigate the conditions required for a stove to be properly integrated in a highly insulated building.