Abstract
This report presents the results of a system study of biofuel refinement. Emphasis has been placed on the choice beween drying and refining the raw fuel to wood powder compared to the alternative of burning the raw fuel directly, with subsequent flue gas condensation. The comparison is made with regard to energy efficiency, economic feasibility, and environmental impact. At applications with low temperature requirements (for example heating of return water to 60-65 deg. C in district heating plants) modern flue gas condensation yields a better overall energy efficiency than drying. For applications with high temperature requirements drying is the only alternative for improving energy efficiency. For such applications, backpressure steam drying yields the best energy efficiency of the different drying methods. For lower temperature requirements, flue gas drying with subsequent flue gas condensation yields at least equally good energy efficiency. When investing in a new baseload combustion unit with an equivalent full-load time of more than 5000 h/year, burning raw fuel (forest waste, wood chips) with subsequent flue gas condensation is the best alternative. It is more economical, at a wood powder price of SEK 150 MWh fuel, to convert an existing oil-fired hot water district heating plant to wood
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Citation Formats
Odeberg, J.
Biofuel refinement or flue gas condensation in connection with cogeneration; Braensletorkning eller roekgaskondensering vid kraftvaermeproduktion.
Sweden: N. p.,
1992.
Web.
Odeberg, J.
Biofuel refinement or flue gas condensation in connection with cogeneration; Braensletorkning eller roekgaskondensering vid kraftvaermeproduktion.
Sweden.
Odeberg, J.
1992.
"Biofuel refinement or flue gas condensation in connection with cogeneration; Braensletorkning eller roekgaskondensering vid kraftvaermeproduktion."
Sweden.
@misc{etde_10141304,
title = {Biofuel refinement or flue gas condensation in connection with cogeneration; Braensletorkning eller roekgaskondensering vid kraftvaermeproduktion}
author = {Odeberg, J}
abstractNote = {This report presents the results of a system study of biofuel refinement. Emphasis has been placed on the choice beween drying and refining the raw fuel to wood powder compared to the alternative of burning the raw fuel directly, with subsequent flue gas condensation. The comparison is made with regard to energy efficiency, economic feasibility, and environmental impact. At applications with low temperature requirements (for example heating of return water to 60-65 deg. C in district heating plants) modern flue gas condensation yields a better overall energy efficiency than drying. For applications with high temperature requirements drying is the only alternative for improving energy efficiency. For such applications, backpressure steam drying yields the best energy efficiency of the different drying methods. For lower temperature requirements, flue gas drying with subsequent flue gas condensation yields at least equally good energy efficiency. When investing in a new baseload combustion unit with an equivalent full-load time of more than 5000 h/year, burning raw fuel (forest waste, wood chips) with subsequent flue gas condensation is the best alternative. It is more economical, at a wood powder price of SEK 150 MWh fuel, to convert an existing oil-fired hot water district heating plant to wood powder firing than continued oil-firing, provided that the equivalent full-load time is in the medium load range (2000 to 4-5000 h/year). Under the same conditions, conversion to wood powder is also more economical than investing in a new combustion unit for raw wood fuel. Integrating the biofuel refining process with a papermill, coproducing facility, or district heating plant, makes it possible to retrieve the energy consumed for drying, and yields the best energy efficiency together with the lowest production cost. Positive integrative advantages are also achieved regarding transport of the raw fuel and the final product, wood powder. (35 refs., 40 figs., 2 tabs.).}
place = {Sweden}
year = {1992}
month = {Aug}
}
title = {Biofuel refinement or flue gas condensation in connection with cogeneration; Braensletorkning eller roekgaskondensering vid kraftvaermeproduktion}
author = {Odeberg, J}
abstractNote = {This report presents the results of a system study of biofuel refinement. Emphasis has been placed on the choice beween drying and refining the raw fuel to wood powder compared to the alternative of burning the raw fuel directly, with subsequent flue gas condensation. The comparison is made with regard to energy efficiency, economic feasibility, and environmental impact. At applications with low temperature requirements (for example heating of return water to 60-65 deg. C in district heating plants) modern flue gas condensation yields a better overall energy efficiency than drying. For applications with high temperature requirements drying is the only alternative for improving energy efficiency. For such applications, backpressure steam drying yields the best energy efficiency of the different drying methods. For lower temperature requirements, flue gas drying with subsequent flue gas condensation yields at least equally good energy efficiency. When investing in a new baseload combustion unit with an equivalent full-load time of more than 5000 h/year, burning raw fuel (forest waste, wood chips) with subsequent flue gas condensation is the best alternative. It is more economical, at a wood powder price of SEK 150 MWh fuel, to convert an existing oil-fired hot water district heating plant to wood powder firing than continued oil-firing, provided that the equivalent full-load time is in the medium load range (2000 to 4-5000 h/year). Under the same conditions, conversion to wood powder is also more economical than investing in a new combustion unit for raw wood fuel. Integrating the biofuel refining process with a papermill, coproducing facility, or district heating plant, makes it possible to retrieve the energy consumed for drying, and yields the best energy efficiency together with the lowest production cost. Positive integrative advantages are also achieved regarding transport of the raw fuel and the final product, wood powder. (35 refs., 40 figs., 2 tabs.).}
place = {Sweden}
year = {1992}
month = {Aug}
}