Background: Energy is the key for economic growth of every nation and as such life blood
for civilization. The demand for energy is also increasing at an exponential pace. To meet this energy
demand, a great need arises to search for alternative sources of energy, which can be used in place of
fossil fuels. Many alternate renewable sources of energy which can be used in place of fossil fuels
biomass is considered one of the best alternative sources of energy due to its large potential and
economic viability. It has been estimated that by 2050 biomass could provide nearly 17% of the
world’s energy. In the present study, a new biomass fuelled triple power cycle is proposed and
Methods: This paper presents the findings of a thermodynamic investigation of a biomass driven
syngas fuelled triple power cycle. In order to utilise the waste heat from the exit of the steam turbine,
an ejector is employed to improve the efficiency of the proposed cycle. A parametric study is
conducted by investigating the effect of gas turbine inlet temperature and gasifier pressure on various
energetic and exergetic efficiencies.
Results: It is found that both energetic and exergetic efficiencies of the triple power cycle increase
with the increase in gas turbine inlet temperature but decrease with an increase in gasifier pressure. It
is observed that with the employment of an ejector the energetic and exergetic efficiencies of the triple
power cycle increase by 6.2% and 3.1%, respectively. Furthermore, sawdust is seen to be more
effective for power generation in comparison to the use of rice husk.
Conclusion: This paper is based on the energetic and exergetic analyses of biomass integrated
gasification for the combined production of power and refrigeration resulting in following concluding
• The energetic and exergetic efficiencies of biomass fuelled triple power cycle increase with the
increase in gas turbine inlet temperature.
• There is an average 6.2% gain in energetic efficiency and 3.1% gain in exergetic efficiency after the
employment of an ejector.
• Slight variation in both the energetic and exergetic efficiencies occur when the biomass is changed
from sawdust to rice husk.
• Both energetic and exergetic efficiencies of the triple power cycle slightly decrease with the increase
in steam turbine inlet pressure.