US2523807A - Radiating panel for heating and cooling systems - Google Patents

Description

p 1950 H. BORGHESAN 2,523,807

RADIATING PANEL FOR HEATING AND COOLING SYSTEMS Filed Dec. 13, 1945 F2 l" d l f K! N i 2 ?lllllllllllllll llHHlIIHHHIHHIHHHT a f a b flue/5Z0? ezzzzfibgakeswc Patented Sept. 26, 1950 orrics RADIATING PANEL FOR HEATING AND COOLING SYSTEMS Henri Borghesan, Nice, France Application December 13, 1945, Serial No. 634,835

In France December 14, 1944 1 Claim. l

The radiating panels used to this day for heating systems include an arrangement of metallic tubes forming a flat coil inside which the heating fluid is caused to flow, said tubes being embedded in concrete adapted to dissipate the heat received from the coil.

For reasons of comfort and also to reduce heat expansion, it is not possible to admit into the tubes a fluid the temperature of which is above a very moderate value. To this end, with the arrangements used to this day the heat is localized at the surface of the panel along strips or lines corresponding to the convolutions of the coil and on which it is unpleasant to stand if their temperature rises beyond a certain value. Under such conditions, the expansion may cause the concrete block to open, said block crackin generally in a direction parallel to the tubular elements.

It is known on the other hand that the range of adjustment of this type of heating is so restricted that it is almost impossible to maintain a constant temperature in a room when the outer conditions of temperature vary.

In order to remove at least the two first drawbacks it is necessary as already stated to restrict the heating fluid-to a predetermined comparatively low temperature. To this end the heating arrangements are provided with special devices adapted to prevent any rise in temperature above said limit. Alarm signals warn in case of a heating above said limit temperature so that the user may interfere as required.

This manner of submitting the arrangements to the interference of the user is dangerous and its effects are detrimental to said arrangements inasmuch as in the case of a failure of the alarm devices the risks encountered are serious. As a matter of fact the panels as they expand to the utmost crack and produce dangerous thrusts on their bearings, the'paint and the like coats fall off, the walls move away so that such accidents may lead'to most serious consequences.

As to the difliculties of adjustment, it should be pointed out that with this manner of heating, the regulator of the boiler adjusted by the stoker acts only over a range of temperatures extending from 30 to 50 C.; said range'is very narrow considering that the heatin when executedis three times greater for the adjustment of such a panel heating, which means that its operation is very difficult. Of course the efi'iciency of the It is arrangement is detrimentally affected thereby and the expense in fuel becomes very considerable.

My invention has for its object to remove these drawbacks. It has in particular for its object improvements in heatin systems and also in cooling systems including radiating panels of the i type disclosed, i. e. including generally speaking a tubular or the like system embedded in concrete and allowing through its particular arrangement the admission without any danger either for the panels Or for the building, of a heating fluid at a high temperature or a cooling fluid together with the production at the surface of the panels of heating or cooling zones or areas which are very numerous and very near one another so as to provide a comfort unknown to this day together with an adjustment over a very large scale of.

temperatures so as to allow an easier control of the arrangement.

My invention is chiefly characterized by the us of a panel including at least two fiat tubular coils arranged in superposition in a manner such that the convolutions of one of them are perpendicular or oblique with reference to the convolutions of the other coil while moreover the lower coil is fed by fluid at a high temperature-and the higher coil is fed by fluid at a lower temperature.

My, invention covers also by way of a novel industrial product panels of the above type considered per se.

Further detail features of the invention will appear in the reading of the present specification.

Appended drawings show by way of example different forms of execution of a radiating panel according to my invention;

Fig. 1 is a plan view of a-first form of execution, the concrete for illustrative purposes being assumed transparent and the upper coil being shown in thick lines while the lower coil is drawn in thin lines.

Fig. 2 is a transversal cross-section of the panel at a larger scale.

Fig. 3 is a plan view of a modification wherein the lower and upper systems are in series.

Fig. 4 is a diagrammatic plan view of the heat emitting areas obtained at the surface of the panels.

Reverting to Fig. 1, the panel includes a concrete slab d which transmits the heat received from the tubular coils fl and f2. The lower coil fl which is deeper in the concrete receives the water at a higher temperature, the flow of water entering at a and flowing out at b. The coil f2 located at the upper end of the panel receives water at a temperature lower'than in the case of fl, said water entering at al and passing out of the panel at bl. Said coil f2 has for its object to moderate the emission of heat from the coil fl by absorbing a part of its heat through conduction and to distribute the heat more uni- 5 formly throughout the surface of the panel.

Fig. 2 shows theposition of the coils fl and f2 embedded in the concrete :block (1. At each point of crossing, the tubes of the two coils are preferably bound together by a suitable wire Z. Heat, insulating material forming a layer 1' prevents the heat from dissipating through the:support-.p;- constituted either by solid or hollow flooringof reinforced concrete or a wooden floor, The two coils fl and f2 may be connected'inseries as illustrated in Fig. 3, thelglower coiljlbeing; connected with the upper coil f2 at the-connect:- ing point bal. When this arrangement is adopted, the output temperature of the lower coil fl corresponds to the temperature of inlet into the-upper coil f2. It-isthus possible-to connect the two ooils at the point-bal and-'torequire thus-only one water inlet ata and-one outlet at bl. The-difference in temperatures between a andb'l is of: course -the.: sum' of the-temperature intervals in each of-ther coils fl and: f2. This. arrangement: allows providing-large intervals of temperatureebetweerr the inlet and outlet ofthe water-:in the heating; panel and .'consequently re ducing to a minimum the output of heating fluid. Consequently this leadsto an increase, in, the icalorifi'c -.yield;1the Vail/1620f which: is; proportional to the stamperature. l intervals between: the r inlet and the-aoutleti-of the; heating-fluid; Lastly-the; range of?'adjustmentcis;greatly:extended thereby; which: considerably facilitates the cotnrol; of: the arrangementz:

Thesemissionrof ih'eatat :the surf-aceofthe. panel is illustrated diagrammatically imEig: 4 itforms a:-;-.mosaic:=of: small: warmer;- areas; A-. and; cooler m areas over: which: itcannot be: unpleasant to standsias 2171185: feet can-ibe:laid;- onlyover surf-aces theytemperaturesz of-yvhich. areivery near oner another:

By: reason: ofrtheereinforcemenvprovided by the; twoctubulan coils; the resistance; of .thespanel to heat expansion;isesuchihat the;cracking;of

the concrete slab is entirely avoided; the considerable adherence of the tubes to the concrete and the binding of the coils to one another at each point of crossing provide an indeformable block capable of resisting high temperatures without any danger of breaking.

Although certain specific embodiments of the invention have been shown and described, it is obvious that many modifications thereof are possible. The invention, therefore, is not to be restricted except in so far as is necessitated by thesprior art: and ,-,by the spirit of the appended claim;

What I claim is:

A-radiating panel for use in heating and cooling systemsrfor. rooms of buildings, comprising agconcreteslab having a radiating surface, a first tubular coil embedded in said concrete slab in a plane adjacent and parallel to said radiating surface and having parallel convolutions extending over-the -whole of said radiating-surface; and'a second tubular" coil embedded in: said concrete.

slab in a difi'e'rent plane that is. parallel to said" radiating surface and' farther from-saideradh atingsurface'than said first coil, said 'second icoil having parallel convolutions extending also over: the whole of "said radiatingsurface, the' convolutions of said second-itubular coil being placed at an" angle with respect 'to'ther convolutions of'said first tubularcoil; and'the outlet: of said second tubular coil being connected'to theinlet'ofi said first tubularcoil;

HENRI? BOR'GHE SAN REFERENCES CITED,

The following references are of record inthe file ofthis' patent:

UNITED STATES PATENTS Number Name Date 050,914;- Branch Jan;= ,2'1 1913 2,052,359, Musgrave= .June 26', 1935 2,338,090 Bradfie1d; n Jan. 4, 19%

FOREIGN. PATENTS Number Country Date,

354,651 v Italy Dec. 1, 1937

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