US1378348A - Hot-water heating system - Google Patents

Description

J. C. HARTWELL. HOT WATER HEATING SYSTEM.

APPLICATION FILED SEPT. 7, 1915.

1,378,348. Patented May 17,1921.

5 by aaaaalmzk,

UNITED STTE S PATENT OFFICE.

GENERAL FIRE EXTINGUISHER COMPANY,

OF PROVIDENCE, RHODE ISLAND, A CORPORATION OF NEW YORK.

HOT-WATER HEATING SYSTEM.

Specification of Letters Patent.

Application filed September 7, 1915. Serial No. 49,137.

and will also have a high degree of efiiciency in proportion to the size and number of the heating units employed. Briefly described, the invention is characterized by the employment'of a number of individual hot water heaters so combined with the other parts of the system that they may be arranged for the circulation of water through them either in series or in parallel, as well as individually or collectively, and preferably, for producing thecirculation, the system includes independent circulating pumps equal in number to the heaters and arranged in parallel in such manner that one or more of the pumps may be used, as conditions may require. For the purpose of explaining the invention it will sufiice to describe a. system having two heaters and two pumps, as the arrangement and mode of operation of any greater number will be readily understood.

A system embodying my invention and containing the parts above referred to as preferably arranged and combined is illustrated in the accompanying drawing, in which the figure shows the heaters and pumps diagrammatically, together with the pipes and valves immediately associated therewith.

According to the arrangement illustrated the two heaters 2 and 3 have their outlets connected respectively by branch pipes 4 and 5 to a cross pipe 6 leading to the main supply pipe 7, through which the heated water is conveyed to the usual radiating pipes or fixtures (not shown). The inlets to the heaters 2 and 3 are connected respectively by branch pipes 8 and 9 to another cross pipe 10, into one end of which the water is forced. A pipe 11 connects the cross pipes 6 and 10, its connection with the pipe 6 being located between the branch pipes 4 and 5 and its connection with the pipe 10 being located between the branch pipes 8 and 9. The outlets from the circulating pumps 12 and 13 are connected respectively by branch pipes 14 and 15 to a cross pipe 16 leading to the cross pipe 10 which supplies the heaters, and the inlets to said circulating pumps 12 and 13 are connected respectively by branch pipes 17 and 18 to a cross pipe 19 leading to the main return pipe 20 of the circulating system.

The with three gate valves 21, 22 and 23, of which the valve 21 is located in the pipe 11, the valve 22 is located in the cross pipe 6 between the branch and the valve 23 is located in 10 between the branch pipe 8 and the pipe 11. In addition, the branch pipes 5 and 8 are preferably provided with gate valves 24 and 25 respectively. although these are not essential to the operativeness of the system. Preferably, also, the branch pipes 14, 15, 17 and 18 leading from and to the circulating pumps are provided respectively with gate valves 26. 27. 28 and 29. although the passage through either pump may obviously be closed by a single valve.

The heaters 2 and 3 and the pumps 12 and 13 may be of any usual or suitable construction. but as it is advantageous in some cases to employ steam for supplying heat to the heaters as hereinafter described I have shown each of said heaters as provided with an inlet pipe 30 and an outlet pipe 31 for conveying steam to and from it.

As thus constructed the system is adapted to be used as follows: Assuming that the valves which control the circulation through one or both of the pumps are open and that the valves 24 and 25 are also open, the heaters 2 and 3 may be arranged in parallel by opening the valves 22 and 23 and closing the valve 21. The water will then flow through both heaters from the cross pipe 10 to the cross pipe 6 and thence to the main supply pipe 7, passing partly through one heater and partly through the other. By opening the valve 21 and closing the valves 22 and 23 the two heaters may be connected in series, in which case the water will flow first through the heater 2, thence by way of the Patented May 1'7, 1921. I

piping above described is provided,

pipe 5 and the pipe 11,. the cross pipe pipe 11 to and through the heater 3, and from the latter to the cross pipe 6 and sup-' ply pipe 7. If the valves 21 and 23 are closed and the valve 22 is open the heater 2 The series arrangement is thus particularly adaptedforhigh-temperatureheating. When the heat demand on the system is light it can alone will be in operation, and by then closbe met by using a single heater only, and this 70 ing the valve 24 the heater 3 may be isolated heater can be supplied with heat by waste from the system for the purpose of cleaning steam or live steam, according to the temor repairing it. Likewise, if the valve 23 is perature required. Either or both of the open and the valves 21 and 22 are closed the heaters may be otherwise supplied with heat,

10-heater 3 alone will be in operation, where if preferred, the parts indicated at 2 and 3 75 uponby closing the valve 25 the heater2 in-the drawing being intended to represent may be isolated for cleaning or repairs. any form of heater suitable for use in a hot Thus the valves 24 and 25 serve primarily water circulating system.

- for isolating the respective heaters, but it It will be seen that the arrangement of will be seen that the closing of the valve- 24 heaters above described gives the system-great 80 will serve the same purpose as the closing-of flexibility and capacity of adaptation to the valve 23 in case the heater 2' is to be meet the heating demand under different used alone, and-that the closing of the valve conditions of use, and this flexibility is pro- 25 will serve the same purpose as the closing moted by the employment of as many cirof the valve 22in case the heater 3 is to be culating'pumps as there are heaters, since it 5 used alone, provided that in either case the will 'suflice to run a single pump when the valve 21 is also closed and that neither demand is light. So far as the arrangement heater is required to be completely isolated. of the heaters is concerned, however, the Also, if the valves 23 and 24 are closed the circulation may be produced by any ade- 26 valve 21 may be left open when the heater quate means, and the arrangement of the 90 2 is to be used alone, and said valve 21 may piping and valves associated with the heatalso be left open in case the heater 3 is to ers maybe modified in various ways without be used alone, provided the valves 22 and departing from my invention, so long as v are closed. This possibility of control by the heaters are capable of arrangement 30 different valves is useful in case any of the either in parallel or in series and are com- 95 valves themselves get out of repair. bi'ned with means for producing an adequate I The manner in which the flow through circulation of water through the system of the circulating pumps is controlled by their which they form a part.

respective valves will be obvious. When all I claim '35 these valves are open both pumps maybe 1. In a hot water heating system arranged 100.

used for circulation, and either pump may for the continuous circulatlon of water therebe completely isolated by closing both of the in, the combination of a plurality of-water associated valves. heaters independently-connected to thecir- When the heaters are utilized in parallel culating system on the supply and return 40 relation the arrangement is adapted to meet sides of the same, means for supplying heat 105 the maximum heating demand on the systo the several heaters independentlyof one tem, and has the advantage that it reduces another, means included in the system for the frictional resistance to the circulation effecting a forced circulation of water of the water, as compared with a system through it, and means for causing the cirhavlng asingle heater, and therefore reduces culating water to pass through the heaters the amount of power required to produce either in series or in parallel relation. the necessary clrculation. If the two heat- 2. In a hot water heating system arranged ers are unequal in tube capacity the flow for the continuous circulatlon of water therethrough each heater can be regulated as dein, the combination of a plurality of water to sired by appropriately adjusting the valve heaters independently connected to the ciror valves controlling the pipe connections culating system,jon the supply and return to that heater. When the heaters areutisides of the same, means for supplying heat lized 1n serles 1'618131011 all the circulating to the several heaters independently of one water has to pass through each heater, and another, a plurality of circulatin pumps in- 5 hence with this arrangement the water can cluded in said system in paral elrelation,

-be heated to a comparatlvely low temperaand means for causing the circulating water ture 111 the first heater and h ought up to ass through the heaters either in series by the second heater the higher temperaor. in parallel relation.

ture required, according to the demand on 3. In a hot water heating system arranged 60 1311? y t In Such case 91 Of dperfor the continuous circulation of water thereation can be effected by utilizing waste in, the combination of a plurality of water steam, such as the exhaust steam from. the heaters independently connected to the circirculatlng pump or pumps for example, for culating system on the supply and return supplymg heat to the first heater, the heat sides of the same, valves controlling the di- 65 at h ghertemperature being supplied to the rect flow from one heater to the supply side neraeee of the system and from the return side of the system to another heater, respectively,

pipe connections between the outlet side ofof the system and from the return side of the system to another heater, respectively, pipe connections between the outlet side of the former heater and the inlet side of the latter heater, a valve controlling said pipe connections, and a plurality of circulating pumps included in the system in parallel relation.

5. In a hot water heating system arranged for the continuous circulation of water therein, the combination of a plurality of water heaters, independent branch pipes connecting the outlets from said heaterswith the circulating system on the-supply side, independent branch pipes connecting the inlets to said heaters with the circulating system on the return side, a pipe providing a connec* tion between the outlet from one heater and the inlet to another heater, a valve controlling the latter pipe, valves controlling the connections between said pipe and the supply and return sides of the system, respectively,

additional valves for isolating the respective heaters, and means included in the system for eifecting a forced circulation of water through the same.

6. In a hot water heating system arranged for the continuous circulation of water therein,the combination of a plurality of water heaters, independent branch pipes connect ing the outlets from said heaters with the circulating system on the supply side, in-

dependent branch pipes conecting thefinlets to said heaters with the circulating system on the return side, a pipe providing a connection between the outlet from one hea er and the inlet to another heater, a valve controlling the latter' pipe, valves controllingthe connections between said pipe and the supply and return sides of the system, respectively, additional valves for isolating the respective heaters, a plurality of circulating pumps included in the system in parallel relation, and valves for isolating either pump.

7 In a hot water heating system arranged for the continuous circulation of water therein, the combinationof a plurality of water heaters independently connected to the circulating system on the supply and return sides of'the same, means included inthe sys term for eflecting a forced circulation of waculating'water to pass through the heaters either in series or in parallel relation, and means for cutting off the flow ,of water through either heater without affecting the flow through any other heater. h

. 8. In a hot water heating system arranged for the continuous circulation of water therein, the combination of a plurality of water 'ter through it, means for causing the cirheaters independent-1y connected to the cirjculating system on the supply and return "sides of the same, means included in the system for effecting a forced circulation of water through it, means for causing the circulating water to pass through'the heaters either in series or in parallel relation, and

valves included in the connections between the heaters and the supply and return sides of the system whereby any heater may be isolated from-the system without interfering.

with the operation of any other heater.

In testimony whereof I have hereunto subscribed'my name this 2nd day of September, 1915. I v D I .iosiaru caaiuss naarwria.

Witnesses:

ALBERT JOHN Lonrsmo'nn, J osnrn HAROLD OA'rns.

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