Abstract
We present the results of studying sorption processes in metal hydride pairs. Technique and laboratory setup are developed for experimental study of kinetics and determination of the duration of interaction between hydrogen and hydrides formed upon saturation of two intermetallic compounds (IMC) of different compositions. The design of the setup and principle of operation are presented. The setup includes two steel retorts which contain the alloys capable of multicycle reversible sorption of hydrogen with formation of the high- and low-temperature hydrides. The system provides measurements of pressure in the hydrogen pipeline between the retorts and temperature of circulating or stirred heat carriers which cool the retorts during sorption and heat them during desorption. The dynamics of hydrogen pressure change in the pipeline and temperature of the heat carrier under simultaneous operation of two hydrides of alloys Mm 1– y La y Ni 4 Co and LaNi 5– x Al x are studied. The duration of hydrogen desorption from the first hydride with simultaneous sorption by the second one is determined. The thermal balance for the low-temperature module of the setup was calculated to prove the obtained kinetic characteristics. Similar results were obtained for desorption of hydrogen from high-temperature metal hydride. The technique and results can be used for simulation of sorption processes in metal hydride pair and determination of the parameters of optimal design for efficient operation of sorption heat pumps.
Highlights
We present the results of studying sorption processes in metal hydride pairs
Îíà çàâèñèò îò ñîñòàâà è ñòðóêòóðû ñïëàâîâ, îáðàçóþùèõ ãèäðèäíóþ ïàðó, êîíñòðóêöèè óñòðîéñòâà, óñëîâèé ïîäâîäà è îòâîäà òåïëîâîé ýíåðãèè, à òàêæå îò ñêîðîñòè ïðîöåññîâ ñîðáöèè è äåñîðáöèè âîäîðîäà. ×òîáû ïîäñ÷èòàòü Nóä, íåîáõîäèìî çíàòü ïðîäîëæèòåëüíîñòü ïîëóöèêëà, â êîòîðîì ïðîèñõîäèò äåñîðáöèÿ âîäîðîäà èç ÍÒÃ
Ïðåïàðàòèâíàÿ õèìèÿ ãèäðèäîâ: ñïðàâî÷íèê. — Êèåâ: Íàóêîâà äóìêà, 1976. — 99 ñ
Summary
Ðàçðàáîòàíû ìåòîäèêà è ëàáîðàòîðíàÿ óñòàíîâêà äëÿ ýêñïåðèìåíòàëüíîãî èçó÷åíèÿ êèíåòèêè è îïðåäåëåíèÿ ïðîäîëæèòåëüíîñòè âçàèìîäåéñòâèÿ ñ âîäîðîäîì ãèäðèäîâ, îáðàçóþùèõñÿ ïðè íàñûùåíèè äâóõ èíòåðìåòàëëè÷åñêèõ ñîåäèíåíèé (ÈÌÑ) ðàçíîãî ñîñòàâà. Êîíñòðóêöèÿ óñòàíîâêè âêëþ÷àåò äâå ñòàëüíûå ðåòîðòû, ñîäåðæàùèå ÈÌÑ, ñïîñîáíûå ê ìíîãîöèêëîâîìó îáðàòèìîìó ïîãëîùåíèþ âîäîðîäà ñ îáðàçîâàíèåì ñîîòâåòñòâóþùèõ ãèäðèäîâ — âûñîêî- è íèçêîòåìïåðàòóðíîãî. Ñèñòåìà ïðåäóñìàòðèâàåò èçìåðåíèå òåìïåðàòóðû öèðêóëèðóþùèõ èëè ïåðåìåøèâàåìûõ òåïëîíîñèòåëåé, îõëàæäàþùèõ ðåòîðòû â ïðîöåññå ñîðáöèè è ïîäîãðåâàþùèõ èõ ïðè äåñîðáöèè, è äàâëåíèÿ â ñîåäèíèòåëüíîé âîäîðîäíîé ìàãèñòðàëè. Èçó÷åíà äèíàìèêà äàâëåíèÿ âîäîðîäà â ìàãèñòðàëè è òåìïåðàòóðû òåïëîíîñèòåëÿ ñ òå÷åíèåì âðåìåíè ïðè îäíîâðåìåííîé ðàáîòå äâóõ ãèäðèäîâ ñïëàâîâ — Mm1–yLayNi4Co è LaNi5–xAlx. Îïðåäåëåíà ïðîäîëæèòåëüíîñòü äåñîðáöèè âîäîðîäà èç ïåðâîãî ìàòåðèàëà ñ îäíîâðåìåííîé ñîðáöèåé åãî âòîðûì. Ïðåäëîæåííàÿ ìåòîäèêà è ðåçóëüòàòû ìîãóò áûòü èñïîëüçîâàíû ïðè ìàòåìàòè÷åñêîì ìîäåëèðîâàíèè ñîðáöèîííûõ ïðîöåññîâ â ìåòàëëîãèäðèäíîé ïàðå, à òàêæå äëÿ îïðåäåëåíèÿ îïòèìàëüíûõ êîíñòðóêòèâíûõ ïàðàìåòðîâ, îáåñïå÷èâàþùèõ ýôôåêòèâíóþ ðàáîòó ñîðáöèîííûõ òåïëîâûõ íàñîñîâ. Êëþ÷åâûå ñëîâà: ìåòàëëîãèäðèä; âîäîðîä; èíòåðìåòàëëè÷åñêèå ñîåäèíåíèÿ; ãèäðèäîîáðàçóþùèå ñïëàâû; ìåòàëëîãèäðèäíàÿ ïàðà; òåïëîâîé íàñîñ; äåñîðáöèÿ; òåïëîâàÿ ýíåðãèÿ; öèðêóëÿöèÿ òåïëîíîñèòåëÿ
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