Lookup NU author(s): Dr Yadong Wang,
Professor Tony Roskilly
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND).
© 2014 The Authors. The technical, environmental and economic analysis of generating electricity and/or heat together with bio-char from poultry litter (PL) waste is the subject of this study. For this analysis, the process simulation software ECLIPSE is used. Modelling and simulation have been conducted over the configuration: combined updraft gasification and pyrolysis process integrated with an Organic Rankine Cycle (ORC). The facility will initially be capable of processing 1500kg of PL waste at 30% moisture content every hour. The expansion plans of the facility are underway to deal with 3000kg of PL waste per hour. Based on the results achieved, the key technical and environmental issues have been examined. Finally, an economic evaluation of the system is performed. The ECLIPSE simulation shows that the yield of biochar produced in the updraft gasifier is around 415kg per hour and the producer gas is about 2052m3/hour with a calorific value of 4.45MJ/Nm3. Gross electric power generated by the ORC system is 391kWhe. Recovered low grade heat for space heating is estimated at 1822kWhth. The results of the economic analysis demonstrate that if the plant is paying 10£/tonne for receiving and handling the PL waste without the options of selling either heat or electricity, the Breakeven Cost for the biochar from the selected system is estimated at £215 per tonne. If the sales of electricity and heat produced by the system are assumed to be about 60£/MWhe and 10£/MWhth, this value will go down to £176 per tonne. The case studies also indicate that if a gate fee of £20/tonne is introduced, the biochar cost (with CHP installation) can be reduced from £176 to £104 per tonne, accounting for 40% cost reduction. On the other hand if biochar generated has an average price of £150 per tonne in the market, the plant is still paying a handling fee of 10£/tonne for the PL feedstock but will receive one Renewable Obligation Certificate (ROC) from the UK Government, the Levelised Cost of Electricity for the power generation will be 51£/MWhe, which is compatible with electricity generated by fossil fuel power plants.
Author(s): Huang Y, Anderson M, Lyons GA, McRoberts WC, Wang Y, McIlveen-Wright DR, Roskilly AP, Hewitt NJ
Publication type: Conference Proceedings (inc. Abstract)
Publication status: Published
Conference Name: International Conference on Applied Energy, ICAE2014
Year of Conference: 2014
Online publication date: 12/01/2015
Acceptance date: 01/01/1900
Publisher: Elsevier Ltd
Series Title: Energy Procedia