FR2553183A1 - Improvement in the power of a chemical heat pump by employing an expanded graphite called Graphex CK-23. - Google Patents

Improvement in the power of a chemical heat pump by employing an expanded graphite called Graphex CK-23. Download PDF

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Publication number
FR2553183A1
FR2553183A1 FR8308354A FR8308354A FR2553183A1 FR 2553183 A1 FR2553183 A1 FR 2553183A1 FR 8308354 A FR8308354 A FR 8308354A FR 8308354 A FR8308354 A FR 8308354A FR 2553183 A1 FR2553183 A1 FR 2553183A1
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Prior art keywords
graphex
power
expanded graphite
chemical heat
heat pump
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FR8308354A
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French (fr)
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TEISSIER AGNES
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TEISSIER AGNES
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Priority to FR8308354A priority Critical patent/FR2553183A1/en
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
    • C09K5/16—Materials undergoing chemical reactions when used

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Thermal Sciences (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Catalysts (AREA)

Abstract

Use of a heat-conductive inert binder to increase the power of a chemical heat pump. An expanded graphite called Graphex CK23 has been found to be a very good catalyst which is inert towards reactants and an excellent heat conductor. The most homogeneous possible mixtures with the initial solid reactant have been produced and a large increase in the power, of the order of 15 times and in individual cases of the order of 30 to 50 times, has been observed. The part played by the expanded graphite (Graphex CK23) is twofold: action on the transfer of matter (owing to the very nature of Graphex CK23 in leaflet form) in a reaction bed.

Description

b) La présente invention consiste à augmenter les puissancès d'une pompe
à chaleur chimique en utilisant un liant inerte conducteur dénommé
GRAPHEX@ CK23 (graphite expansé).b) The present invention consists in increasing the powers of a pump
using chemical heat using an inert conductive binder called
GRAPHEX @ CK23 (expanded graphite).

c) La pompe à chaleur chimique est basée sur l'utilisation des réactions chimiques reversibles fonctionnant à trois niveaux de température selon les équilibres :

Figure img00010001
c) The chemical heat pump is based on the use of reversible chemical reactions operating at three temperature levels according to the equilibria:
Figure img00010001

Où G est un fluide Calorigène (l'amoniac, la méthylanine, l'éthylanine, alcools) et les sels employés sont les plus souvent les halogénures de métaux alcalins ou alcalino-terreux. Where G is a Calorigene fluid (ammonia, methylanine, ethylanine, alcohols) and the salts used are most often the halides of alkali or alkaline earth metals.

L'objectif des pompes à chaleur chimique réside essentiellement dans le stockage de l'énergie thermique en vue de chauffage de l'habitat, il est donc nécessaire d'en connaître la puissance ou la vitesse de la réaction gaz-solide mise en jeu. The objective of chemical heat pumps essentially resides in the storage of thermal energy with a view to heating the home, it is therefore necessary to know the power or the speed of the gas-solid reaction involved.

En général, la puissance que l'on peut extraire des pompes a chaleur chimique est faible. @@@@ @@@ d@ @@@@@@@ieldement @ un manvala @@@@@@@@@@@@ de chaleur @@ du matlère au nive@u du lit rén@@@onnel @@lide ei en @@@@@@@@@ de l'optimisation des échanges thermiques. Il s'agit donc d'amélforer ces transferts c'est-à-dire d'optimiser et contrôler la puissance que l'on
peut extraire ou stocker.In general, the power that can be extracted from chemical heat pumps is low. @@@@ @@@ d @ @@@@@@@ ieldement @ un manvala @@@@@@@@@@@@@ heat @@ from the matlère to the nive @ u of the ren bed @@@ onnel @ @lide ei en @@@@@@@@@ optimizing heat exchange. It is therefore a question of improving these transfers, that is to say of optimizing and controlling the power which
can extract or store.

d) Le Le GRAPHEX CK23 a été teaté ; il est inerte yis-à-yis des réactifs
que j'utilise (l'ammoniac, la méthylanine, l'ethylanine, l'alcool) et il
est très stable dans les domaines de températures considérés (-100C à + 1100C) il s'est révélé un hon conducteur de chaleur.d) The GRAPHEX CK23 has been teat; it is inert yis-to-yis reactants
that I use (ammonia, methylanine, ethylanine, alcohol) and it
is very stable in the temperature ranges considered (-100C to + 1100C) it has been shown to be a conductor of heat.

Le mélange de GRAPHEX CK23 porte à 200 C avec les. solides réactifs initiaux, selon l'invention permet d'augmenter considérablement la vitesse de réaction gaz-solide c'est-à-dire la puissance des systèmes chimiques. The mixture of GRAPHEX CK23 brings to 200 C with the. initial reactive solids, according to the invention makes it possible to considerably increase the gas-solid reaction speed, that is to say the power of the chemical systems.

L'addition du GRAPHEX CK23 joue un rôle très important jusqu'à un mélange de 25 z en poids. The addition of GRAPHEX CK23 plays a very important role up to a mixture of 25% by weight.

Le graphite expansé dénommé GRAPHEX CK23 permet donc en agissant sur le transfert de chaleur (bon conducteur de chaleur) et de matière (par la nature meme du graphite expansé en feuillets) d'augmenter considérablement la puissance des réactions solides-gaz  Expanded graphite called GRAPHEX CK23 therefore allows, by acting on the transfer of heat (good heat conductor) and of material (by the very nature of expanded graphite in sheets) to considerably increase the power of solid-gas reactions

Claims (3)

1. Le me lange du graphite expanse dénommé GRAPHEX CK23 avec le solide reactif augmente sensiblement la puissance des pompes à chaleur chimique faisant intervenir des reactions solide-gaz, et offre ainsi une nouvelle voie prometteuse à son exploitation et son application dans lea differents domaines particulièrement au chauffage. de l'habitat. 1. The mixture of expanded graphite called GRAPHEX CK23 with the reactive solid appreciably increases the power of chemical heat pumps involving solid-gas reactions, and thus offers a promising new path to its exploitation and its application in the various fields particularly heating. habitat. REVENDICATION CLAIM 2. Le GRAPHEX CK23 porté à 200 C a'est révélé un liant inerte vis-è-vis des réactife (l'ammoniac, la méthylanine, l'ethylanine, l'alcool) et un bon conducteur de chaleur. 2. The GRAPHEX CK23 brought to 200 C has been found to be an inert binder vis-à-vis the reagents (ammonia, methylanine, ethylanine, alcohol) and a good heat conductor. 3. Toutes les graphites expansées qui ont les mêmes structures que le 3. All expanded graphites which have the same structures as GRAPHEX CX 23 peuvent être employées en vue d'augmenter la puissance. GRAPHEX CX 23 can be used to increase power.
FR8308354A 1983-05-20 1983-05-20 Improvement in the power of a chemical heat pump by employing an expanded graphite called Graphex CK-23. Withdrawn FR2553183A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8308354A FR2553183A1 (en) 1983-05-20 1983-05-20 Improvement in the power of a chemical heat pump by employing an expanded graphite called Graphex CK-23.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8308354A FR2553183A1 (en) 1983-05-20 1983-05-20 Improvement in the power of a chemical heat pump by employing an expanded graphite called Graphex CK-23.

Publications (1)

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FR2553183A1 true FR2553183A1 (en) 1985-04-12

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FR8308354A Withdrawn FR2553183A1 (en) 1983-05-20 1983-05-20 Improvement in the power of a chemical heat pump by employing an expanded graphite called Graphex CK-23.

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0646635A1 (en) * 1993-09-30 1995-04-05 Elf Aquitaine Process for the realisation of an active composite
FR2715081A1 (en) * 1994-01-19 1995-07-21 Elf Aquitaine Reagent in the form of granules for thermochemical systems.
FR2736144A1 (en) * 1995-06-30 1997-01-03 Elf Aquitaine Insertion cpd. used to improve the kinetics of solid-gas reactions
WO1998000473A1 (en) * 1996-07-02 1998-01-08 Elf Aquitaine Insertion compound and method for using same

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0646635A1 (en) * 1993-09-30 1995-04-05 Elf Aquitaine Process for the realisation of an active composite
FR2710553A1 (en) * 1993-09-30 1995-04-07 Elf Aquitaine Process for producing an active composite
FR2715081A1 (en) * 1994-01-19 1995-07-21 Elf Aquitaine Reagent in the form of granules for thermochemical systems.
EP0664329A1 (en) * 1994-01-19 1995-07-26 Elf Aquitaine Reagent in granular form for thermochemical systems
US5569534A (en) * 1994-01-19 1996-10-29 Elf Aquitaine Reactant in the form of granules for thermochemical systems
FR2736144A1 (en) * 1995-06-30 1997-01-03 Elf Aquitaine Insertion cpd. used to improve the kinetics of solid-gas reactions
WO1998000473A1 (en) * 1996-07-02 1998-01-08 Elf Aquitaine Insertion compound and method for using same

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