Computer modelling of wood pellet stoves and boilers connected to solar heating systems

Document identifier: oai:dalea.du.se:2105
Keyword: Pellets, Stoves, Boilers, Efficiency, Emissions, Emission reduction
Publication year: 2006
Relevant Sustainable Development Goals (SDGs):
SDG 7 Affordable and clean energySDG 9 Industry, innovation and infrastructure
The SDG label(s) above have been assigned by OSDG.ai

Abstract:

When optimizing systems for wood pellet and solar heating, there is a need for realistic computer models of stoves and boilers in order to perform simulation studies. The objective of this work was to develop and verify a mathematical model for wood pellet stoves and boilers for use in system simulations with TRNSYS calculating both the energy balance and CO-emissions (carbon monoxide). Laboratory measurements have been carried out on three pellet stoves, one traditional and two with gas-liquid heat exchangers, and four pellet boilers. A mathematical two-node model of a stove was developed and implemented as a TRNSYS component. Parameters were identified for two stoves and three boilers. This new model makes it possible to perform detailed simulations with time steps less than a minute of complete wood pellet heating systems and to derive long term values, such as annual values, of efficiency and emissions for the boiler or stove in a system context under realistic conditions. In addition, parametric studies can be used in order to investigate how different operation principles and system design affect these values. The simulated energy balance of a water jacketed stove investigated in this work agreed well with measured data during both stationary and dynamic conditions.

Authors

Svante Nordlander

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Tomas Persson

Högskolan Dalarna; Miljöteknik
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Frank Fiedler

Högskolan Dalarna; Miljöteknik
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Mats Rönnelid

Högskolan Dalarna; Miljöteknik
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Chris Bales

Högskolan Dalarna; Miljöteknik
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