SE440550B

SE440550B - Absorption refrigeration device which works with hydrogen gas as an inert gas

Info

Publication number: SE440550B
Application number: SE8404013A
Authority: SE
Inventors: P E Blomberg
Original assignee: Electrolux Ab
Priority date: 1984-08-08
Filing date: 1984-08-08
Publication date: 1985-08-05
Also published as: SE8404013D0

Abstract

An absorption refrigeration device which works with hydrogen gas as an inert gas. The circulation system for the device is connected to a receptacle (50) containing a substance (54) that when warmed, emits hydrogen gas into the system and when cooled absorbs hydrogen gas from the system. The receptacle (50) with the substance (54) is designed to be warmed when the surrounding temperature increases, at which the substance emits hydrogen gas to the system so that the pressure and thereby the condensing temperature in this rises. Through this it becomes possible to have the device produce cold even at higher surrounding temperature.<IMAGE>

Description

8404013-8 Från absorbatorkärlet lU stiger blandningen av köldmediumànga och inert gas upp genom absorbatorn 38 och möter där fattig lösning, som, driven av nivån 24, kommer från röret 22 via ett rör 4D in i absorbatorns 38 övre del vid 42. Vid sin strömning nedåt genom absorbatorn 38 absorberar den fattiga lösningen uppåtströmmande köldmedium- ånga under värmeavgivning till absorbatorns omgivning, varigenom den fattiga lösningen blir rik lösning igen innan den rinner ned i absorbatorkärlet 10 vid 44. Den uppâtstigande inerta gasen fortsätter från absorbatorn 38 till röret 32 och gär därefter på nytt in i föràngaren 30 och låter köldmediumkondensatet förangas i sig. From the absorber vessel 11, the mixture of refrigerant vapor and inert gas rises through the absorber 38 and meets there poor solution, which, driven by the level 24, comes from the tube 22 via a tube 4D into the upper part of the absorber 38 at 42. At its flow downwardly through the absorber 38, the poor solution absorbs upward refrigerant vapor during heat dissipation to the absorber environment, whereby the poor solution becomes rich solution again before flowing into the absorber vessel 10 at 44. The ascending inert gas continues from the absorber 38 to the tube 32 and then back into the evaporator 30 and allows the refrigerant condensate to evaporate on its own.

I ändamål att förhindra att köldmediumànga, som eventuellt inte kondenseras i kondensorn 26, och inert gas, som medföljer köldmediumkondensatet in i kondensorn, samlas i kondensorn och blockerar utströmningen av köldmediumkondensat från denna, är ett ventilationsrör 46 anordnat mellan kondensorns 26 utlopp och röret 36, vilket ventilationsrör leder bort gasformigt medium till absorbatorkärlet 10.In order to prevent refrigerant vapor, which may not be condensed in the condenser 26, and inert gas which accompanies the refrigerant condensate into the condenser, collect in the condenser and block the outflow of refrigerant condensate therefrom, a ventilation pipe 46 is provided between the outlet of the condenser 26 and the condenser 26 which vent pipe leads gaseous medium away to the absorber vessel 10.

Den Ovan beskrivna anordningar: är förut allmänt känd. Det nya hos uppfinningen skall nu beskrivas.The devices described above: are previously generally known. The novelty of the invention will now be described.

En behållare 50 är anordnad i värmeledande kontakt med ventilationsröret 46 och kommunicerar genom en ledning 52 med detta. Behållaren 50 innehåller ett ämne 54, som vid uppvärmning avger vätgas och vid avkylning absorberar vätgas. Om omgivninga- temperaturen blir så hög, att den ej förmår att kondensera köldmediet i kondensorn så ,, att köldmediumånga passerar ut genom kondenscrns utlopp, kommer detta att resultera i att ventilationsrörets temperatur stiger ca. 10 - 15 OCZ, varvid ämnet 54 i be- hållaren 50 värmes och avger vätgas till kylapparatens cirkulationssystem. Trycket stiger härvid i cirkulationssystemet med resultat att kondenseringstemperaturen i kondensorn 26 stiger, varvid köldmediet börjar kondensera igen och apparaten återtar sin förmåga att producera kyla.A container 50 is arranged in heat-conducting contact with the ventilation pipe 46 and communicates with a conduit 52 therewith. The container 50 contains a substance 54 which, on heating, emits hydrogen gas and on cooling absorbs hydrogen gas. If the ambient temperature becomes so high that it is unable to condense the refrigerant in the condenser so that refrigerant vapor passes out through the condenser outlet, this will result in the temperature of the ventilation pipe rising approx. 10 - 15 OCZ, whereby the substance 54 in the container 50 is heated and emits hydrogen gas to the refrigeration system's circulation system. The pressure then rises in the circulation system with the result that the condensing temperature in the condenser 26 rises, whereby the refrigerant begins to condense again and the apparatus regains its ability to produce cold.

När omgivningstemperaturen sjunker igen sjunker ventilationsrörets 46 och där- med ämnets 54 temperatur, varvid ämnet absorberar vätgas från cirkulationssystemet, så att trycket i detta sjunker mot normala värden.When the ambient temperature drops again, the temperature of the ventilation pipe 46 and thus of the blank 54 drops, whereby the blank absorbs hydrogen gas from the circulation system, so that the pressure therein drops towards normal values.

Behållaren 5D med ämnet 54 kan också påverkas direkt av omgivningstempera- turen, såsom visas med streckade linjer i figuren, där behållaren 50 är anordnad fritt i omgivande luft. Ämnet 54 kan vara en metall eller en förening, som bildar en hydrid med väte vid avkylning och där hydriden återgår till att vara metall eller förening och vätgas vid uppvärmning. Exempel pà en metall och förening som bildar reversibla metallhydrider är Ti respektive LaNis, som tillsammans med väte bildar Til~l2 respektive l.aNi5H?- å.The container 5D with the blank 54 can also be directly affected by the ambient temperature, as shown in broken lines in the figure, where the container 50 is arranged freely in ambient air. The substance 54 may be a metal or a compound which forms a hydride with hydrogen on cooling and where the hydride returns to being a metal or compound and hydrogen gas on heating. Examples of a metal and compound which form reversible metal hydrides are Ti and LaNis, respectively, which together with hydrogen form Til ~ l2 and l.aNi5H? - å, respectively.

Claims

81404933 Patent claims

An absorption cooling apparatus comprising a closed circulation system and operating with a refrigerant, an absorption liquid and an inert gas, said apparatus having a boiler (14) for expelling refrigerant vapor from the absorption liquid, a condenser (26 cooled by ambient air for condensing the refrigerant vapor, an evaporator (39) for evaporating the refrigerant condensate in the inert gas, an absorber (SE) for the absorbent liquid to absorb the refrigerant manganese in and an absorber vessel (13) for collecting the absorption liquid, the inert gas being hydrogen gas, characterized in that the system is characterized in that with a container (50), arranged to be heated at Fjkanc 'ambient temperature and cooled at decreasing ambient temperature, which containers contain a substance (54) which on heating emits: - hydrogen gas and on cooling absorbs hydrogen gas.

Apparatus according to claim 1, characterized in that the substance (54) is in a heat-conducting contact with the ambient air.

Apparatus according to claim 1, wherein the apparatus is provided with a ventilation: pipe (46), which connects the outlet of the condenser (26) to the absorber vessel (1Cf that the blank (54) is in heat-conducting contact, characterized by it, the ventilation pipe (46). ).

Apparatus according to any one of the preceding claims, characterized in that the container (50) communicates directly with the ventilation pipe (46). Apparatus according to any one of the preceding claims, wherein the hydrogen-absorbing substance consists of Ti (titanium) or a lanthanide or of metal alloys based on these metals.