Waste heat recovery from a landfill gas-fired power plant
- 18 February 2012
- journal article
- review article
- Published by Elsevier BV in Renewable and Sustainable Energy Reviews
- Vol. 16 (4), 1779-1789
- https://doi.org/10.1016/j.rser.2012.01.036
Abstract
Waste treatment and management is a certain challenge especially in areas with high population density. One of the options for waste treatment is landfilling, where the amount of municipal waste also produces landfill gas through anaerobic digestion. The heating value of the landfill gas is high enough to use it as a fuel in combustion processes, e.g. in internal combustion engines (ICEs) to produce electric power. In Ano Liosia, Athens (Greece) up to 6000 tons of waste are landfilled every day and the landfill gas is used in an ICE power station directly at the site of the landfill. The power station consists of 15 ICEs and has an installed capacity of 23.5 MW. The major advantages of using ICE for power generation are the high electrical efficiency of ICEs and their fast load response. However, more than 50% of the landfill gas energy content is still released to the atmosphere as engine waste heat (exhaust gas and engine cooling water). The aim of this paper is to study the possibilities of using this large amount of heat in order to increase the electricity production and efficiency of the Ano Liosia power station. Therefore, a thermodynamic and economic analysis of two different waste heat recovery (WHR) systems is conducted. The water/steam cycle and the Organic Rankine Cycle (ORC) are examined and evaluated by means of thermodynamic cycle simulation and by calculating their specific costs of power generation. Their advantages and disadvantages considering their application in landfillgas-fired ICE power stations are discussed under the consideration of maximal thermodynamic efficiency and minimal costs of power generation.Keywords
This publication has 19 references indexed in Scilit:
- Evaluation of the effect of engine, load and turbocharger parameters on transient emissions of diesel engineEnergy Conversion and Management, 2009
- Parametric optimization and comparative study of organic Rankine cycle (ORC) for low grade waste heat recoveryEnergy Conversion and Management, 2008
- Bottoming micro-Rankine cycles for micro-gas turbinesApplied Thermal Engineering, 2007
- Study of available exhaust gas heat recovery technologies for HD diesel engine applicationsInternational Journal of Alternative Propulsion, 2007
- Fluid selection for the Organic Rankine Cycle (ORC) in biomass power and heat plantsApplied Thermal Engineering, 2006
- Cylinder wall temperature effects on the transient performance of a turbocharged Diesel engineEnergy Conversion and Management, 2004
- Effect of working fluids on organic Rankine cycle for waste heat recoveryEnergy, 2004
- Waste heat recovery of organic Rankine cycle using dry fluidsEnergy Conversion and Management, 2000
- A review of organic rankine cycles (ORCs) for the recovery of low-grade waste heatEnergy, 1997
- Evaluation of Brayton and Rankine Alternatives for Diesel Waste Heat ExploitationJournal of Engineering for Gas Turbines and Power, 1994