The problem to be solved by the research work

Development of scientific and technological foundations for the creation of a combined system of safe hydrogen transportation and storage based on hydride technologies, which ensures its high dynamic characteristics.

Object and subject of the research work

The object of research is the processes of transformation of substances and energy in the formation of a new type of energy carrier - a hydrogen-containing suspension, which has the properties of reversible storage of hydrogen and its compression, as well as the design features of the creation of systems for the transportation, storage and compression of hydrogen.The subject of the research is the regularities and parameters of the processes of transformation of substances and energy in hydride-forming suspensions, as well as the peculiarities of the processes of pumping such a suspension, extracting high-purity and pressure hydrogen from it).

Purpose of the research work

The goal is to develop and create a prototype of a combined hydrogen energy supply system based on suspensions of intermetallic compounds in organic liquids, as well as to establish the optimal parameters of such a system that will enable efficient use in the energy sector of Ukraine and can be a competitive high-tech product in foreign markets.

Key performance indicators

List of articles in journals included in scientometric databases (Social Science Citation Index, Web of Science, Scopus, etc.) - 2Articles in journals included in the list of professional journals of Ukraine - 9б Dissertations defended - 1Number of implementation agreements concluded - 1

Scientific results obtained

- it was found that the maximum value of the efficiency of the combined power supply system based on hydrogen hydride technologies reaches 8.5% for metal hydride materials with a temperature of hydride formation T* = 280...290 K and a specific enthalpy of hydride formation ΔH = 30...40 kJ/(molH2);- determined the value of the specific power of the utilisation combined power supply system based on hydrogen hydride technologies, at the expansion ratio of the hydrogen expansion machine Pt = 1...350, at the hydrogen inlet temperature T2 = 350...500 K, the inlet pressure P2 = 0.5...15 MPa, taking into account the actual properties of hydrogen;- regeneration of mechanical thermal energy allows to increase the efficiency of heat utilisation in combined energy supply systems based on hydrogen hydride technologies with MOD by 3 and 14%, respectively;- a methodology for calculating a hydrogen expansion machine was developed, taking into account the actual properties of hydrogen, and the values of the coefficient that takes into account the difference between the parameters of hydrogen and those of an ideal gas - the imperfection coefficient - were determined;

Scientific results obtained

- The rational value of the desorption temperature is Td = 350...400 K and Td = 400...450 K for materials V0.83Ti0.1Fe0.07 and ZrCrFe1.6, respectively, under the conditions of the accepted limitations (Pmax = 15 MPa, Pmin = 0.5 MPa, ηRMP = 0.95, ηNR = 0.95, rt = 0.9);- The efficiency of the combined power supply system based on hydrogen hydride technologies, when using the hydride-forming material V0.83Ti0.1Fe0.07, is 8.3%, when using ZrCrFe1.6 - 7.5%. The use of energy regeneration (ηRMR = 0.95, ηNR = 0.95, rt = 0.9) when using ZrCrFe1.6 material will allow to obtain a system efficiency of 24%;- heat recovery of the EGR of the 9G80ME-C9.2-TII engine (42.3 MW, 72 min-1) of the combined power supply system based on hydrogen hydride technologies provides an increase in the mechanical power of the power plant of 3.0...3.2 MW, which is 6.3...7.4% of the ICE power;- the rational range of desorption temperatures in relation to the metal hydride suspension based on MmNi4.5Al0.5 and the parameters of the internal combustion engine is Td = 360...390 K.