Sunamp pioneered and patented the Heat Store and Processor (HSP) architecture which combines Phase Change Material (PCM) for thermal storage and heat upgrading. In the HESPER project (Heat Store & Processor for Emissions Reduction) developed in the IDP8 framework Sunamp Ltd, Zytek Automotive Ltd and University of Edinburgh intend to demonstrate via tests of HSP at the vehicle sub-system and system levels that: 1.CO2 emission from internal combustion engine (ICE) used in conventional, start/stop, hybrid and plug-in hybrid vehicles can be drastically reduced by thermal pre-conditioning of the cylinder head and catalytic converter; 2. range extension and homogeneity (specifically in variable weather conditions) for electrified vehicles (HEVs, PHEVs, BEVs) can be achieved, avoiding electric battery oversizing; 3. fuel cells startup in cold climate can be facilitated and stresses on electrochemical components reduced; 4. the overall system related to thermal management can be drastically simplified; 5. materials at the core of the technology are safe in automotive environments; 6. the technology can achieve Technology Readiness Level 5 for automotive applications.