EP0986726A1

EP0986726A1 - Latent heat storage body

Info

Publication number: EP0986726A1
Application number: EP99916820A
Authority: EP
Inventors: Klaus Fieback; Dirk Carsten BÜTTNER; Michael Matthäi; Helmut Gutberlet
Original assignee: Schuemann Sasol GmbH and Co KG
Current assignee: Schuemann Sasol GmbH and Co KG
Priority date: 1998-04-02
Filing date: 1999-03-16
Publication date: 2000-03-22
Also published as: CA2292532A1; WO1999051928A1; AU3517499A

Abstract

The invention relates to a latent heat storage body (1) made of a paraffin-based latent heat storage material and comprising an outer envelope (2). The latent heat storage material has a first melting point. In order to obtain an outer envelope that is both easy to fit and at the same time offers sufficient protection, the outer envelope (2) consists of a meltable paraffin-based material with a second melting point which is higher than the first melting point.

Description

00001 latent heat storage body

00002

The invention relates to a latent heat storage body

00004 with a latent heat storage material based on paraffin

00005 and an envelope, the latent heat storage material

00006 material has a first melting temperature.

00007

Such latent heat storage bodies are already in ver¬

00009 different configuration has been described. It will

00010 especially on the unpublished German

00011 patent application 198 05 028.3 referenced. The Offenba¬

The content of this patent application is hereby fully agreed

00013 in the disclosure of the present application

00014 included, also for the purpose of features of the above

00015 Registration in claims of the present application

Pull 00016.

00017

It has been proposed a latent heat storage

00019 body with a covering made of a plastic film

00020 surrounded. The latent heat storage body can also

00021 be surrounded by a hard plastic shell. These types of

00022 wrapping are not yet satisfied in every respect

Representing 00023. On the one hand, there are the materials for this

00024 not always insensitive in the desired way,

00025, for example, with regard to a rough treatment on a

00026 construction site. On the other hand, the application is certain

00027 connected as perceived work steps.

00028

00029 Based on the above-described prior art

00030 the invention is concerned with the task set

00031 lung, a latent heat storage body with an envelope

00032 ment to specify, the wrapping on the one hand the

Should adequately protect latent heat storage body and

00034 on the other hand should be easy to apply. 00036 This task is first and foremost

00037 solved in the subject of claim 1, being on it

00038 is turned off that the wrapping from a wrapping

00039 paraffin-based material is that the wrapping

00040 material is meltable and a second melting temperature

Has 00041 rature, the second melting temperature

00042 is higher than the first melting temperature. Invention

00043 Maß is a paraffin-based latent heat storage body

00044 proposed, which in turn an envelope

Has paraffin-based 00045. First of all,

00046 good compatibility of the materials, the material

00047 as the latent heat storage body and the encapsulation

00048 terials. It is also high

00049 insensitivity given. The wrapping cannot

Tear 00050 but may be damaged locally.

The wrapping material based on paraffin is in

00052 somewhat compliant. It also owns

00053 even if it is at the transition temperatures of the

00054 latent heat storage body itself not for melting

00055 comes, a certain memory effect. It can also be in

00056 are easily applied, for example by thawing

00057 chen of the latent heat storage body in a melt

00058 of the wrapping material. On the other hand, the wrapping

00059 material can also be sprayed on, for example. In wide

00060 rer embodiment is also preferred that the latent

00061 heat storage body has a structural material and

00062 that the wrapping the structural material under illustration

00063 surrounds the structure. For example, the latent

00064 heat storage body a structural material in the form of a

00065 fabric, a knitted fabric, of porous wood, foam

Have 00066 or the like. The measure, the wrapping

To be designed in such a way that the structural material is reproduced,

So 00068 means that the wrapping matches the contour of the structure.

Reproduces 00069 turmaterials in the outdoor area. Alternatively

For this purpose, it may also be preferred that the casing 00071 surrounds the structural material. this means

00072 also that the wrapping on the latent heat storage

00073 body with a locally different thickness

00074 is brought in, in such a way that essentially

00075 equal to surface fissures, protruding

00076 parts and the like of the structural material reached

Is 00077. With regard to the melting point of the coating material

00078 rials is one of 70 ° or more, up to

00079 about 105 ° C, preferred. It is also particularly preferred

00080 that the wrapping material contains a proportion of fishing

Contains 00081 Tropsch paraffins (FT paraffins). Herewith

00082, a particularly smooth surface can also be achieved.

00083 chen. FT paraffins consist primarily of normal paraffins

00084 affine. More than 80% are usually N-alkanes. The

00085 rest are ISO alkanes. The chain length is from C30 to

00086 about C100, with a gradation (solidification point, EP)

00087 from approx. 68 to 105 ° C. Oxidized FT-Paraf-

00088 fine can be used. This, for example, about the

00089 speed of wrapping to increase. The freezing point

In this way, 00090 can also be reduced by approximately 5 K.

00091 Furthermore, alternatively or additionally, a

00092 share of micro waxes may be provided. Micro waxes

Like paraffins, 00093 are mixtures of different carbon

00094 hydrocarbons, but they mainly contain

00095 ISO paraffins. Further alternatively or additionally

A proportion of urea may be included. This is especially

00097 in particular with regard to a fire retardant setting

00098 advantageous. Other fire retardants can also do this

00099 materials are still included. Furthermore,

00100 natively or additionally that the wrapping

00101 lungsmaterial contains polymers. In particular, it can

00102 are, for example, poly-

00103 mere act. Examples of polymers here include alkyd resin,

00104 PVC copolymers, polyacrylates or PE waxes for

00105 use. The fire retardant is particularly 00106 re preferably only provided in the envelope, not

00107 also in the rest of the latent heat storage body. The

00108 wrapping itself can also be constructed in multiple layers

00109.

00110

The invention also relates to a method for

00112 Production of a latent heat storage body with one

00113 Latent heat storage material based on paraffin and one

00114 this wrapping. This is preferred

00115 provided that first the latent heat storage body

00116 itself is produced on paraffin basis and then

00117 in the cured state of the latent heat storage body

00118 based on paraffin, a covering of the latent heat

00119 storage body with a wrapping material on paraf

00120 fin basis, a second, higher melting temperature,

00121 is made. In a preferred embodiment

00122 also provided that after the latent

00123 heat storage body dividing this latent heat

00124 memory body takes place in sections and that so won

00125 nene sections each again separately with the envelope

00126 material to be wrapped. Here, the envelope

00127 be made in the immersion process or also

00128, for example, by spraying. It is preferred that the

00129 wrapping material contains a proportion of FT paraffins

00130 and / or a proportion of micro waxes and / or a

00131 proportion of urea and / or a proportion of polymers

00132 contains.

00133

00134 The invention is further based on the

00135 attached drawing, which, however, is only an embodiment

00136 illustrates example. Here shows:

00137

00138 Fig. 1 shows a cross section and partially perspective

00139 cal view of one provided with a covering

00140 NEN latent heat storage body; and 00141 FIG. 2 shows an illustration of a latent heat storage part body provided with a covering 00142. 00143 00144 Shown and described, initially with reference to 00145 Fig. 1, a latent heat storage body 1, which is surrounded with a 00146 sheath 2 based on paraffin. The latent00147 heat storage body 1 has a structural material 3 00148 and an impregnation of the structural material 3 or a 00149 intake in spaces or capillary spaces of the 00150 structural material 3 from a latent heat storage material 00151 erial on a paraffin basis. This latent heat store 00152 body 1 has a first melting point of 50 ° C. 00153 00154 The latent heat storage body 1 is completely surrounded by the covering 2 00155. The casing 2 has a 00156 second melting point, which is 70 °. 00157 00158 The wrapping material consists predominantly, 80%, of 00159 FT paraffins and in addition a proportion of 10% 00160 polymers and 10% other paraffins. 00161 00162 In Fig. 2 is a latent heat storage part body 4 Darge00163 represents with a sheath 5. The sheath 5 is constructed in 00164 the same way as the sheath 2. 00165 00166 With regard to the FT paraffins, for example the FT paraffins known under 00167 of the trade name HI or 00168 C105 or C80 can be used. With regard to - high melting melting - micro waxes, those under the 00170 trade names OPO 3279, ZWM 095 and OPO 8080 can be used 00171. With regard to 00172 intermediate paraffins which are still to be used, those with the trade name 00173 OFA 6403 can be used. With regard to polymer 00174 waxes, so-called EVA waxes (ethyl vinyl 00175 acetate waxes) can be used. These are also in the 00176 trade name Elvax. Beyond that too

00177 polyisobuty waxes. Resins can also be used

00178 come. Here in particular so-called piccolites. On

00179 Flame retardants can aluminum hydroxide, magnesium

00180 calcium carbonate hydroxide, artmonium polyphosphate and

00181 urea are used. 00182

00183 The following example mixtures for the wrapping material

00184 can be specified: 00185

00186 1. 30% C80, 30% OPO 3279, 30% aluminum hydroxide and 10%

00187 polyisobutylene; 00188

00189 2. 80% OPO, 20% ammonium polyphosphate;

00190

00191 3. 50% Hl, 30% Elvax 220, 20% aluminum hydroxide; and

00192

00193 4. 50% OFA 6403, 40% Elvax, 10% Piccolite resin.

00194

00195 All disclosed features are essential to the invention. In

00196 the disclosure of the application is hereby also the

00197 disclosure content of the associated / attached priori

00198 documents (copy of the pre-registration)

00199 also included, for the purpose of, characteristics of this

00200 documents in claims of the present application

00201 to record.

Claims

00202 ANS P RUCHE 00203 00204 1. Latent heat storage body (1) with a latent00205 paraffin-based heat storage material and a wrapping (2), the latent heat storage material having a 00207 first melting temperature, characterized 00208 net that the wrapping material (002) from 00 The paraffin base consists of the coating material 00210 being meltable and having a second melting temperature 00211, and the second melting temperature being higher than 00212 the first melting temperature. 00213 00214 2. Latent heat storage body (1) according to claim 1 or 00215, in particular according thereto, characterized in that the 00216 latent heat storage body has a structural material (3) 00217 and that the sheath (2) surrounds the structural material 00218 (3), depicting the structure. 00219 00220 3. Latent heat storage material according to one or more 00221 of the preceding claims or in particular according to it, 00222 characterized in that the covering (2) surrounds the structural material (3) in a compensating manner. 00224 00225 4. latent heat storage material according to one or more 00226 of the preceding claims or in particular according thereto, 00227 characterized in that the second melting temperature is 00228 tur 70 ° or higher. 00229 00230 5. Latent heat storage material according to one or more 00231 of the preceding claims or in particular according to it, 00232 characterized in that the wrapping material contains 00233 Fischer-Tropsch paraffins. 00234 00235 6. latent heat storage material according to one or more 00236 of the preceding claims or in particular according thereto, 00237 characterized in that the wrapping material

00238 contains micro wax.

00239

00240 7. Latent heat storage material after one or more

00241 of the preceding claims or in particular according thereto,

00242 characterized in that the wrapping material

00243 contains a fire retardant additive.

00244

00245 8. Latent heat storage material after one or more

00246 of the preceding claims or in particular according thereto,

00247 characterized in that the wrapping material

00248 contains urea.

00249

00250 9. Latent heat storage material after one or more

00251 of the preceding claims or in particular according thereto,

00252 characterized in that the wrapping material

00253 contains a proportion of polymers.

00254

00255 10. Latent heat storage material according to one or more

00256 ren of the preceding claims or in particular

00257 thereafter, characterized in that the wrapping material

00258 rial is multilayered.

00259

00260 11. Latent heat storage material after one or more

00261 ren of the preceding claims or in particular

00262 thereafter, characterized in that only in the outer

00263 most layer of wrapping material is a fire retardant

00264 addition is included.

00265

00266 12. Process for the production of a latent heat storage device

00267 body with a latent heat storage material on paraf

00268 fin basis and a completely enclosing envelope

00269 lung, wherein the latent heat storage material is a first

00270 has melting temperature, characterized in that

00271 first a latent heat storage body on paraffin 00272 sis is produced and that this latent heat

00273 memory body in the immersion spray process or the like

00274 is provided with a paraffin-based coating. 00275

00276 13. The method according to claim 12 or in particular there-

00277 according to, characterized in that after manufacturing

00278 of the first latent heat storage body

00279 this latent heat storage body is carried out and

00280 that sections thus obtained are completely covered with the

00281 paraffin-based coating material. 00282

00283 14. The method according to any one of claims 12 or 13 or

00284 especially afterwards, characterized in that the

00285 wrapping is made by dipping. 00286

00287 15. The method according to any one of claims 12 to 14 or

00288 especially afterwards, characterized in that the

00289 wrapping is carried out by spraying.