期刊
BIOMASS & BIOENERGY
卷 71, 期 -, 页码 12-22出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.biombioe.2014.01.048
关键词
Biomass boiler; Heat pump; Heat recovery; Flue gas condensation; Net present value analysis; GHG emissions
资金
- project ActiveCond within the framework of the NEUE ENERGIEN (new energies) research program out of the Klima- und Energiefonds (climate and energy fund), Austria
- Austrian Federal Ministry for Transport, Innovation and Technology (BMVIT)
- Austrian Research Promotion Agency (FFG)
An active condensation system for the heat recovery of biomass boilers is evaluated. The active condensation system utilizes the flue gas enthalpy exiting the boiler by combining a quench and a compression heat pump. The system is modelled by mass and energy balances. This study evaluates the operating costs, primary energy efficiency and greenhouse gas emissions on an Austrian data basis for four test cases. Two pellet boilers (10 kW and 100 kW) and two wood chip boilers (100 kW and 10 MW) are considered. The economic analysis shows a decrease in operating costs between 2% and 13%. Meanwhile the primary energy efficiency is increased by 3-21%. The greenhouse gas emissions in CO2 equivalents are calculated to 15.3-27.9 kg MWh(-1) based on an Austrian electricity mix. The payback time is evaluated on a net present value (NPV) method, showing a payback time of 2-12 years for the 10 MW wood chip test case. (C) 2014 Elsevier Ltd. All rights reserved.
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