Hydrogen Energy Use in Comfort and Transport

This chapter presents aspects of hydrogen use in comfort systems and thermal machines in order to improve performance and to reduce pollution emissions. Hydrogen energy is clean, and its use leads to a reduction of CO2 emissions into the atmosphere. It represents an alternative to traditional fuels, oil, coal, and gas. The use of hydrogen preserves traditional fuel resources. In the field of comfort, the energy obtained from hydrogen is applicable in the heating and air conditioning of spaces, in the production of electricity necessary to create light comfort. The use of hydrogen in boilers leads to the reduction of pollutant emissions. Hydrogen fuelling systems were designed for different experimental thermal machines, designed by authors from spark-ignition engine and compression ignition engine. The characteristic combustion parameters, like maximum pressure, the maximum rate of pressure rise, efficiency, and pollutant emissions for hydrogen fuelling are presented and analyzed.