DE102006052110A1 - fluid reservoir - Google Patents

Abstract

The present invention relates to a fluid reservoir, in particular a fluid reservoir with a sorption medium, which is characterized in that an energy absorption and / or -abgabevorrichtung is provided for improving the energy balance and the immediate callable heat supply for the gas release process from the sorption medium during the removal of fuel from the fluid reservoir ,

Description

The The present invention relates to a fluid reservoir, in particular a fluid reservoir with a sorption according to the preamble of claim 1.

State of the art

to Storage of fluids, especially gaseous fuels for operation from KFZ's is the Use of sorption reservoirs, e.g. based on metal hydrides or Metal Organic Frameworks (MOF). When filling the Tanks, the so-called binding energy is released as heat and must be dissipated. To remove the stored gas in the tank, this differential energy but fed again be to the previously entered bond between the gas and the Sorption medium break up again and thus the gas for removal to be able to release.

to Incorporation of this energy expenditure for the removal of the gas The sorption tank is currently the provision of an electric heater or the use of engine waste heat known.

A increased electrical heating the burden of for the energy supply required battery or a corresponding Batteries, which in particular during the starting process of an engine in addition strong can be charged. The triggering of Gas from the sorption storage through engine heat works in the startup or starting operation of an engine due to its relatively low temperature even unsatisfactory to bad. Especially with cold outside temperatures Such an approach is conceivably unfavorable or even dysfunctional.

Task and advantages of the present invention

Of the The present invention is therefore based on the object of a fluid storage to improve according to the kind set forth.

The solution This object is achieved by the features of claim 1. In the Subclaims are indicated advantageous and expedient developments.

Therefore The present invention relates to a fluid reservoir, in particular a fluid reservoir with a sorption medium, which is characterized that provided an energy intake and / or -abgabevorrichtung is. Thus, the liberated when refueling the Sorptionsspeichers Binding energy is added to the memory and via accordingly additional Components, e.g. a heating or Cooling circuit be led out of it, or to break the bond again between at least a portion of the gas and the sorbent medium to withdraw gas from the tank at any time immediately available again supplied become.

To potential Memory types and memory properties should be noted the following: For storage of gaseous For example, fuels in cars can Sorption storage based on e.g. Metal Hydrides or Metal Organic Frameworks (MOF) be used. At the filling of the tank with the gas, the binding energy is released as heat and has to be removed become. As a rule, this must exceed a certain temperature which corresponds to the activation energy to desorption of the gas.

at Latent heat storage can by using the heat of fusion during the phase change of a suitable memory material a high Energy density can be realized with only a small temperature. By the higher Energy density, the memory can be made more compact than a conventional one sensitive storage. Due to the low surface and a lower temperature of the memory, the heat losses of the memory are simultaneously reduced. Preference will be this Materials for using the latent heat for melting temperatures of 0-1400 ° C proposed.

For caching this transferred energy in the form of differential heat between Refueling and emptying of the fluid reservoir is therefore preferred Use of a latent heat storage proposed. Through the use of such a latent heat storage is permanent enough immediately available energy for sufficient Fluid removal from the sorption tank available, so anytime a perfect operation of the energy converter operated with this fluid, e.g. in the form of a fuel cell or a gas engine is, especially at low ambient temperatures.

Around one possible good effect of energy transfer, both at the time of removal and reuse, is further suggested that a part of the energy intake and / or Dispensing device is arranged in the interior of the fluid reservoir. For example, this can be done by a multiple memory areas Be realized.

Such storage areas can be understood, for example, as coaxially extending areas of space in the interior of the store, which can be, for example, by a tube bundle running longitudinally in the interior of the store, preferably evenly distanced, are traversed. It is also conceivable, however, an arrangement one, for example along a longitudinal axis extending, spiral tube bundle, which can be arranged coaxially to one or more further, preferably the same aligned tube bundles to increase efficiency.

to increase of energy carrier throughput in Inside this energy absorption and / or -abgabevorrichtung is further proposed the use of a pump. The energy carrier medium may be e.g. be a suitably suitable fluid.

to support for one even faster operational readiness and / or as a redundant device may be provided in addition a heating element, which overcomes of at least part of the binding energy for the release of the in the Sorption medium bound fluid is used. Such a heater can e.g. An electric heater, but it can also by a Connection to a heating and / or cooling circuit of the operated Energy converter be realized, so that the energy converter dissipated Waste heat through This coupling to his heating and / or cooling circuit also the energy transfer in the power receiving and / or dispensing device.

The CHP between such a cooling circuit, e.g. an engine cooling circuit or a fuel cell cooling circuit, and the fluid reservoir can optionally with two from each other separate cooling circuits, But it is also conceivable a direct, fluid-conducting connection of both cooling or cardiac middle circles. In a separate structure, the heat transfer for example, by an additional heat exchangers respectively. The use of valves is advantageous in both cases, because a corresponding circulation control for different operating conditions is possible.

alternative to this first combination, or in addition, a further Heat recovery over the provided exhaust gas emitted by the thermal and / or mechanical energy converter be. Also, this can be a heat exchanger be provided that the existing in the exhaust pipe residual heat as Energy to re-trigger of the gas stored in the sorbent medium, preferably also supported by a pump and via valves on or coupled out.

embodiment

The The present invention will be described below with reference to the attached FIG and the description relating thereto.

It show the

1 a schematic diagram of a representation equipped with a sorption medium fluid reservoir with integrated energy absorbing and / or -abgabevorrichtung and a wiring connection with other functional components.

In detail shows the representation in the 1 one with a sorption medium 2 filled fluid reservoir 1 and an energy receiving and / or dispensing device integrated therein 3 , With a heating and cooling circuit 4 can when refueling the sorption 1 recovered with gas-releasing binding energy and for a later re-feed to reverse the binding process in a latent heat storage 5 be cached.

Part of the energy intake and / or delivery device pervades as a conduit 6 in the form of a tube bundle 7 several internal storage areas. As a result, the binding energy released during refueling can be dissipated as well as possible and, in the event of the gas being taken back out of the tank, re-supplied with the most uniform possible spatial distribution, so that rapid sorption of gas is ensured for the sorption medium. To increase the efficiency of the energy absorption and / or -dgabevorrichtung that in the line 6 filled heat transfer medium, this may for example be a frost protection solution, by means of a pump 8th to be circulated.

To support the heat recovery in the sorption or as a redundant heat source can be a heater 13 be provided, the example here in the line 6 the heating and / or cooling circuit 4 is integrated. To further optimize the energy balance, the energy absorption and / or -abgabevorrichtung 3 with a heating and / or cooling circuit 15 a thermal and / or mechanical energy converter 16 be connected. This connection is symbolic here through the connection 14 shown, for fluid coupling a valve 9 in the form of a control valve. The heat input from the engine cooling circuit via a heat exchanger 17 ,

Further operating states of the fluid reservoir 1 are by appropriate control of the other valves 10 . 11 and 12 possible. For example, another heat input into the energy absorption and / or -abgabevorrichtung 3 via a coupling of the in an exhaust pipe 20 discharged and via a heat exchanger 18 recovered exhaust heat of the energy converter 16 over the line connection 19 possible. The supply of the energy converter 16 , For example, in the form of a gas engine or a fuel cell, with fuel, controlled by the two valves 22 and 23 , via the fluid line 21 ,

Thus, by the inventively provided energy and / or -abgabevorrichtung 3 with the heating or cooling circuit 4 and the latent heat storage 5 a way to optimize the energy balance while improving the operational readiness of a equipped with a sorption medium fluid reservoir 1 described by a possible, but not limited to an exemplary embodiment.

Claims (10)

Fluid storage ( 1 ), in particular fluid reservoir with a sorption medium ( 2 ), characterized in that an energy receiving and / or dispensing device ( 3 ) is provided. Fluid store according to claim 1, characterized in that the energy receiving and / or dispensing device ( 3 ) a heating or cooling circuit ( 4 ). Fluid store according to one of the preceding claims, characterized in that the energy receiving and / or dispensing device ( 3 ) a latent heat storage ( 5 ). Fluid store according to one of the preceding claims, characterized in that a part of the energy receiving and / or dispensing device ( 3 ) inside the fluid reservoir ( 1 ) is arranged. Fluid store according to one of the preceding claims, characterized in that the energy receiving and / or dispensing device ( 3 ) a multiple internal storage areas extending line ( 6 ). Fluid store according to one of the preceding claims, characterized in that the energy receiving and / or dispensing device ( 3 ) a tube bundle ( 7 ). Fluid store according to one of the preceding claims, characterized in that the energy receiving and / or dispensing device ( 3 ) a pump ( 8th ). Fluid store according to one of the preceding claims, characterized in that the energy intake and / or output device ( 3 ) a heating element ( 13 ). Fluid store according to one of the preceding claims, characterized in that the energy receiving and / or dispensing device ( 3 ) a connection ( 14 ) to a heating and / or cooling circuit ( 15 ) of a thermal and / or mechanical energy converter ( 16 ). Fluid store according to one of the preceding claims, characterized in that the energy receiving and / or dispensing device ( 3 ) a connection ( 19 ) to an exhaust pipe ( 20 ) of a thermal and / or mechanical energy converter ( 16 ).