Chalmers University investigated the combination of intercooling with pulsed detonation combustion (PDC) in turbofan engines. The flow is pre-cooled using a compact two-pass cross-flow heat-exchanger design located in a secondary bypass duct. The spent cooling air is ejected through a variable area nozzle and is recovered as thrust. The variable area nozzle allows for a greater control of the amount of rejected heat as well as a reduction of the intercooler external Mach number and its associated pressure losses. Intercooling before PDC, improves the volumetric efficiency, allows for increased combustion pressure ratios, reduces the risk of pre-ignition and reduces the engine cooling requirements. The engine concept is matured to TRL2 and optimized for a typical long-range mission. This study allowed to estimate CO2 and NOx emissions associated with intercooled PDC technology, operating at relevant pressures and temperatures expected to occur in state of the art 2050 gas turbine applications for long-range civil aircraft.