@ARTICLE{10.21494/ISTE.OP.2024.1146, 

TITLE={Hydrogen wet combustion and “Water Vapor Pump-cycle”}, 
  
AUTHOR={Rémi Guillet
, Jean-Pierre Hébert
, Gérald Brunel, }, 
	
JOURNAL={Entropy: Thermodynamics – Energy – Environment – Economy }, 
	
VOLUME={5}, 

NUMBER={Issue 2}, 
	
YEAR={2024}, 

URL={https://www.openscience.fr/Hydrogen-wet-combustion-and-Water-Vapor-Pump-cycle}, 
	
DOI={10.21494/ISTE.OP.2024.1146}, 
	
ISSN={2634-1476}, 
	
ABSTRACT={The so-called “water vapor pump” cycle is defined by the selective recycling of the water vapor carried by the combustion products at the outlet of the thermal machine by exchange of mass and heat between the exiting combustion products and the incoming atmospheric air. With hydrogen fuel, this form of wet combustion is capable of very high energy and ecological performance. In this context, we present here the Hydrometric Combustion Diagram (HCD) of hydrogen and apply this tool to anticipate the energy performance of this new fuel whose PCS exceeds its PCI by 18%. These expectations also concern the case of gas turbines in the case of wet combustion which, moreover, are, a priori, highly consuming additional water. The formation of atmospheric water plumes, the "cost" of its elimination, the possible residual pollution due to NOx are also presented, this concerning the use of hydrogen fuel in all thermal combustion machines, including in fuel cells. All applications combined and in a cogeneration context, wet combustion, of which the so-called “water vapor pump” cycle is part, increases the dew point temperature of the combustion products by approximately 10°C and promotes useful energy recovery. approaching 100% of the higher calorific value of the fuel (100% of the PCS). What is to be emphasized with hydrogen fuel.}}