Energy Efficient and Ecological Housing (ECOHOUSING)

Transcription

1 Rīgas Riga Tehniskā Technical universitāte University Faculty Enerģētikas of Energy un elektrotehnikas and Electrical Engineering fakultāte Vides Institute aizsardzības t of Energy un Systems siltuma and sistēmu Environment institūts Energy Efficient and Ecological Housing (ECOHOUSING) Combustion technologies Aivars Žandeckis, Ph.D., researcher and lecturer

2 Biomass combustion technologies 2 Domestic appliances: -stoves; - fireplaces; - boilers; Industrial appliances: -pulverised burners; - fluidized bed; - cyclone chambers; - bed combustion; -etc.

3 Wood log and briquette stoves 3 + Simple and cheap technology; + Cheap fuel; + Possible integration of water boiler; - Low comfort, short working time; - Low efficiency, high emissions Source: H.Hartmann, P.Turovski, Handbook of Biomass Combustion and Co-firing

4 Heat loss distribution for wood log and briquette stoves 4 Efficiency < 60 % Heat loss with flue gas 92% Mechanicaly uncomplete combustion 1% Chemicaly uncomplete combustion 7% Source: Environmental Monitoring laboratory, RTU Institute of Energy Systems and Environment

5 Pellet stoves 5 Based on wood stove, designed for installation in living area + Fully automatic operation Source: English Handbook for Wood Pellet Combustion

6 Pellet boilers + High efficiency, i low emissions; i + Automatic/semi-automatic operation, variable load; + Fuel storage for long period; + Big choice of technologies; - Relatively expensive technology. Source: Environmental Monitoring laboratory, RTU. Picture: I. Obernberger, G. Thek

7 Construction ti of pellet boilers Source: I. Obernberger, G. Thek

8 Pellet burners (1) 8 Source: I. Obernberger, G. Thek

9 Pellet burners (2) 9 Source: I. Obernberger, G. Thek, Ecco-Energo

10 Heat loss distribution for pellet boilers 10 Efficiency % Heat loss to environment Mechanicaly 32% uncomplete combustion, 0.5% Chemicaly uncomplete combustion 1% Heat loss with flue gas 64% Source: Environmental Monitoring laboratory, RTU Institute of Energy Systems and Environment

11 Storage for pellets 11 Source: Power from Pellets

12 Wood log and briquette boilers 12 + Simple and cheap technology; + Cheap fuel, different fuel; - Relatively short working time; - No automatization, - Low efficiency in real life conditions; - Low comfort. Fröling FHG Turbo 3000

13 Heat loss distribution for wood log and briquette boilers 13 Efficiency % Heat loss to environment ; 5% Heat loss with flue gas; 12% Mechanicaly uncomplete combustion, 0.5% Chemicaly uncomplete combustion; 1% Source: Environmental Monitoring laboratory, RTU Institute of Energy Systems and Environment

14 Industrial combustion technologies 14 Source: Handbook of biomass combustion and Co-firing

15 15 Bed combustion (fixed or moving) Source: E.Vīgants, Handbook of biomass combustion and Co-firing

16 16 Bed combustion (fixed or moving) Source: E.Vīgants

17 17 Bed combustion (fixed or moving) Source: E.Vīgants

18 18 Bed combustion Source: Handbook of Biomass Combustion and Co-firing

19 Pulverised burners 19 Source: E.Vīgants

20 Circulating and bubbling fluidized bed combustion 20 Source: EUBIA, T. Li, J.F.Dietiker, Y.Zhang, M.Shahnam

21 Avedøreværk district Avedøreværk district heating plant, Copenhagen Source: English Handbook for Wood Pellet Combustion

22 How to increase efficiency of the well made and well operated boiler? 22

23 Condensation in pellet boilers 23

24 Condensation in big scale plants 24 + Efficiency increase 10-20% + Dust emissions - 90%

25 Contacts 25 Riga Technical University Institute of Energy Systems & Environment Kronvalda boul. 1, Riga, Latvia Aivars Žandeckis Vides aizsardzības un siltuma sistēmu institūts