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

Abstract

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.

Validation of a transient zonal model to predict the detailed indoor thermal environment: Case of electric radiators and wood stoves

“…For a given stove s T , c P is then obtained by subtracting the estimated thermal radiation from the measured electric consumption. A similar procedure was used in the previous study using a larger electric stove [26]. In both cases, the convective power ( c P ) can be fairly approximated by the Churchill and Chu correlation for a laminar and turbulent boundary layer over a vertical plate [38]:…”

“…All stove surfaces were painted to get a uniform emissivity of 0.9, which was again verified using an infrared camera. This stove is a smaller version of an existing electric stove used in previous investigations [26].…”

“…Consequently, the zonal model should be able to capture the strong thermal coupling between the heat source, room surfaces and the air, as well as transient behaviour. Previous investigations using field measurements [26] have shown that thermal stratification is non negligible when using wood stoves and can impair thermal comfort [27]. The standard room model proved to predict the operative temperature relatively well but is, by definition, unable to evaluate thermal stratification.…”

Parametric Energy Simulations of a Nordic Detached House Heated by a Wood Stove

“…Georges et al [2,3] conducted such investigations and showed that the proper integration of wood stoves in passive houses is possible, both in the mild climate of Belgium and cold climate zones of Norway. The use of BPS to evaluate the time-varying operative temperature during the space-heating using a stove has been validated experimentally [4,5]. Unfortunately, these detailed simulations are not accessible when people (possibly assisted by wood stove dealers) have to select a stove for their home.…”

A Simplified Power Sizing Method for the Correct Building Integration of Wood Stoves

“…Georges et al [2,3] has conducted such investigations and showed that proper integration of wood stoves in passive houses is possible both in the mild climate of Belgium and cold climate zones of Norway. The use of BPS to evaluate the timevarying operative temperature during the space-heating using a stove has been validated experimentally [4]. Unfortunately, these detailed simulations are not accessible when people (possibly assisted by wood stove dealers) have to select a stove for their home.…”