a b s t r a c t
Integration of Hydrothermal Liquefaction (HTL) of microalgae biomass with concentrated solar power
thermal processing (CSP) for bio-oil production is a potential processing pathway for energy efficient generation
of renewable biofuels. Solar HTL infrastructure avoids additional bolt-on components of conventional
solar parabolic trough systems used for electricity production including heat transfer fluids,
counter current heat exchangers, fluid transfer interconnectivity and electrical power control systems.
The absence of such capital intensive additional equipment considerably reduces the production costs
of solar HTL biofuels compared to electricity generation from conventional CSP power systems. An economic
and market appraisal of variance and system economic resilience is presented. It is hypothesised
that the combination of nutrient recycling with HTL/CSP unification has the potential for economically
sustainable microalgae bio-oil production. A microalgae biofuel minimum fuel sales price of $1.23/kg
has been modelled. Further experimental work would be able to validate this integrated model.