martti aho research director, renewable energy programmes, university of jyvaskyla
DESCRIPTION
Stirling-aided heat and power (10 kW) production from wood pellets and planning a miniature ESP for small scale combustion. Martti Aho Research director, Renewable energy programmes, University of Jyvaskyla Evaluation of the Energy Research In Finland 1999 - 2005, - PowerPoint PPT PresentationTRANSCRIPT
2006
UNIVERSITY OF JYVÄSKYLÄ
Stirling-aided heat and power (10 kW) production from wood pellets and planning a miniature ESP for small scale combustion
Martti Aho Research director, Renewable energy programmes, University of Jyvaskyla
Evaluation of the Energy Research In Finland 1999 - 2005, 31.05.2006 in University of Jyväskylä
2006
UNIVERSITY OF JYVÄSKYLÄ
Goal of research
Demonstration of electricity production from wood pellets in 10 kWe size in minimum of 15% efficiency (from fuel energy) without operational problems
2006
UNIVERSITY OF JYVÄSKYLÄ
Stirling-aided power production:State of art
Routine from natural gas: Electricity can be produced with efficiency of about 25%.
Power production from solid biomass is in research stage because of ash related problems
Experiments in very small scale (1 kWe) has been conducted in the U.S.
Experiments in 37-75 MWe scale have been conducted by Technical University of Denmark (DTU) and Austrian research centres. No commercial products yet.
2006
UNIVERSITY OF JYVÄSKYLÄ
Traditional pelletboiler
Concept under development
Water
2006
UNIVERSITY OF JYVÄSKYLÄ
Example of CFD calculations: Fuel power 60 kW High landa (a) and fuel gas recirculation (b) with equal mass flow of flue gas
λ=2,03, circ. 0% m= 48 g/s(λ=1,47, circ. 0%, m= 33 g/s)
λ=1,47, circ. 46% m= 48 g/s
sec+tert 558 oCsec+tert 345 oC
Tf=1245 Tf=1173 Tf= 1224 oC
Cleverair jetdirection
a b1 b2
2006
UNIVERSITY OF JYVÄSKYLÄ
Vertical Furnace, fuel power 80 kW max
Pellet burner
EconomisersExtract about 60 kW)
Comb. air preheating & flue gas recirculation
Stirling-engine 9-10 kWe
2006
UNIVERSITY OF JYVÄSKYLÄ
Co-operation
Technical Research centre of Finland Helsinki University of Technology Finnish industry (four companies)
International co-operation planned in a submitted EU proposal (ERA-NET)
2006
UNIVERSITY OF JYVÄSKYLÄ
Development of miniature electrostatic precipitator (ESP) for small scale combustion
Goal– To develop a miniature ESP for small scale combustion (< 200
kW thermal) capable to reduce particulate concentration in the flue gas by 80%
State of art:– High need in the markets– No commercial devices available– Prototype development in Austria, Norway and Switzerland since
2003– Our version differs from those prototypes
2006
UNIVERSITY OF JYVÄSKYLÄ
Scheme of the collector (JYU)
Examples of results obtained so far
Particle charging principle (TUT)
2006
UNIVERSITY OF JYVÄSKYLÄ
Co-operation
Technical Research centre of Finland (VTT) Tampere University of Technology (TUT) Helsinki University of Technology (HUT) Finnish industry (three companies)
A proposal has been submitted to extend this research (EU level)