Improvements relating to the Heating of Air for Warming and Drying Purposes.
Year: 1889

page_text: Date of Application, 31st Oct., 1889
Complete Specification Left, 30th July, 1890-Accepted, 30th Aug., 1890
DDAYIN
Improvements relating to the Heating of Air for Warming and
Drying Purposes.
I GEORGE AUGUSTUS MOWER, of 75 Queen Victoria Street, in the City of London,
Engineer, do hereby declare the nature of this invention to be as follows:-
The object of my invention is to provide for the heating of air by means of the
waste or exhaust heat from gas or hydrocarbon engines and for the utilization of the
air thus heated for warming rooms or the like, and for other purposes for which
heated air is desirable.
In carrying my said invention into practice I cause the waste gases from the
explosion or the products of combustion on leaving the cylinder to pass in their
heated condition through a series of tubes or the like around the outer surface of
which air is caused to circulate by means of an exhaust fan or blower or otherwise ;
the air is thus heated more or less according to the rapidity of the current and the
temperature of the tubes.
In some cases I also provide for heating air by means of the water or other liquid
which is used for cooling the cylinder and which is usually allowed to flow away at
a comparatively high temperature, thus causing loss of heat. I provide for causing this
water, after it has passed through the jacket around the cylinder, to circulate through
tubes or the like around which air is caused to circulate by means of a fan or otherwise.
I find it advantageous to combine these methods of utilizing the waste heat from
gas and hydrocarbon engines, the air being caused to circulate around two sets of
tubes through one set of which flows the heated water from the cylinder jacket, and
through the other set of which are caused to pass the waste gases or products of
combustion from the cylinder.
I prefer in all cases that the direction of movement of the air to he heated should
be the reverse of that of the heated water or waste gases.
The air so heated is pure and free from objectionable smells or fumes.
I provide for the discharge of the heated air directly from my heating apparatus
into the chamber to be warmed; or I provide in any other convenient manner for
utilizing the heated air for warming or drying purposes.
It is obvious that the construction of my improved apparatus may be varied in
detail without departing from the nature of my said invention. Thus for instance
instead of carrying the hot exhaust gases and heated water through tubes and passing
the air to be warmed outside the said tabes as above set forth, I in some cases pass
the air through the tubes or the like and cause the hot gases or water to circulate
outside thereof.
.L:.91 1
1000
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements relating to the Heating of Air for Warming and
Drying Purposes.
I, GEORGE AUGUSTus Mower of 75 Queen Victoria Street, in the City of London,
Engineer, do, hereby declare the nature of this invention and in what manner the
same is to be performed, to be particularly described and ascertained in and by the
following statement:-
My invention relates to the heating of air for warming and drying purposes and
is designed to provide for accomplishing this result by means of the waste or exhaust
heat from gas or hydro-carbon engines.

page_text: +
According to one part of my said invention I cause the waste gases, or the products
of combustion on leaving the cylinder of the engine to pass in their heated condition
in contact with one side of a series of metallic tubes, plates or the like, on the other
side of which the air to be heated is caused to circulate by means of an exhaust fan
or blower or in any other convenient manner; the air is thus heated more or less
according to the rapidity of the current thereof and the temperature to which the
said surfaces are raised by the heated gases.
34
According to another part of my said invention I provide for heating the air by
means of the water or other liquid which is used for cooling the cylinder and which
is usually allowed to flow away at a comparatively high temperature. I cause this
water after it has passed through the jacket around the cylinder to pass in contact
with one side of a series of metallic tubes plates or the like, on the other side of
which air is caused to circulate by means of a fan or blower or in any other convenient
manner.
I find it advantageous in certain cases, to combine these methods of utilising the
waste heat from gas and hydrocarbon engines, the air being caused to circulate
through two sets of apparatus in one of which it is warmed by means of the heated
water from the cylinder jacket while in the other it is further heated by the waste
gases or products of combustion.
I prefer in all cases that the direction of movement of the air to be heated should
be the reverse of that of the heated water or waste gases.
In the accompanying drawing,
Figure 1 is a plan,
Figure 2 a side elevation,
.
Figure 3 a vertical central section on the line, e, Figure 1, and
Figure 4 a horizonial section on the line y. y Figure 3, of one form of apparatus
whereby the beating of the air according to my said invention may be conveniently
and advantageously effected.
Like letters indicate corresponding parts throughout the drawings.
A is a casing or shell constructed of thin sheet metal or other suitable material.
This casing is supported upon, or provided at its lower part with, a second casing or
chamber B from which it is separated by a plate B¹. The casing A is divided into
two compartments by partitions C extending up from the plate B¹ through the
middle of the casing A and terminating at a short distance from the top thereof so
that the said compartiments communicate with each other at their upper end.
D, D are metal tubes which extend up one side of the casing A over the aforesaid
partitions and down the other side of the said casing as shown, the ends of the
said tubes being inserted through the plate B and opening into the chamber B.
This chamber is provided with a suitable hinged valve or door E and with suitable
pipes F F for the ingress and egress of the heating medium, one on each side of the
said hinged valve or door E so that, when the said door is in the position shown in
Figure 3 the heating medium, in flowing through the apparatus, must pass through
the series of tubes D.
The chamber or casing A is provided with an inlet opening G for the air to be
heated and with an outlet G¹ for the discharge of the heated air.
The air is heated by means of the apparatus shown as follows, viz. The heating
medium, that is to say, the waste gases or heated products of combustion from the
cylinder of the engine, or the heated water from the cooling jacket of the said
cylinder, is admitted through the inlet F into the chamber B on one side of the valve
or door E and flows therefrom through the tubes D and back into the said chamber B
on the other side of the said valve or door, whence it is conducted through the outlet
aperture F¹ into a suitable chimney or flue. The air to be heated is admitted into
the casing A through the inlet aperture and travels upward in the said casing
amongst the tubes D and passing over the partitions C, descends in the part of the
said casing A on the other side of the said partitions, and is conducted from the
sai casing through the outlet opening G to heating pipes or other suitable
apparatus in which it is to be utilized for warming rooms or for drying or other
Figure 2 a side elevation,
Figure 3 a vertical central section on the line a, e, Figure 1, and
Figure 4 a horizonial section on the line y y Figure 3, of one form of apparatus
whereby the beating of the air according to my said invention may be conveniently
and advantageously effected.
Like letters indicate corresponding paris throughout the drawings.
A is a casing or shell constructed of thin sheet metal or other suitable material.
This casing is supported upon, or provided at its lower part with, a second casing or
chamber B from which it is separated by a plate B¹. The casing A is divided into
two compartments by partitions C extending up from the plate B¹ through the
middle of the casing A and terminating at a short distance from the top thereof so
that the said compartiments communicate with each other at their upper end.
D, D are metal tubes which extend up one side of the casing A over the aforesaid
partitions and down the other side of the said casing as shown, the ends of the
said tubes being inserted through the plate B¹ and opening into the chamber B.
This chamber is provided with a suitable hinged valve or door E and with suitable
pipes FF for the ingress and egress of the heating medium, one on each side of the
said hinged valve or door E so that, when the said door is in the position shown in
Figure 3 the heating medium, in flowing through the apparatus, must pass through
the series of tubes D.
The chamber or casing A is provided with an inlet opening G for the air to be
heated and with an outlet G' for the discharge of the heated air.
The air is heated by means of the apparatus shown as follows, viz. :--The heating
medium, that is to say, the waste gases or heated products of combustion from the
cylinder of the engine, or the heated water from the cooling jacket of the said
cylinder, is admitted through the inlet F into the chamber B on one side of the valve
or door E and flows therefrom through the tubes D and back into the said chamber B
on the other side of the said valve or door, whence it is conducted through the outlet
aperture F¹ into a suitable chimney or flue. The air to be heated is admitted into
the casing A through the inlet aperture and travels upward in the said casing
amongst the tubes D and passing over the partitions C, descends in the part of the
said casing A on the other side of the said partitions, and is conducted from the
said casing through the outlet opening G to heating pipes or other suitable
apparatus in which it is to be utilized for warming rooms or for drying or other

page_text: purposes. It will thus be observed that, in the apparatus shown in the drawing,
the air to be heated travels outside the tubes in a direction contrary to that in
which the heating medium travels within the said tubes. The heat is thus com-
municated from the said gases to the air to be warmed through the medium of the
tubes D in a very efficient and economical manner, without the air being in any way
contaminated or rendered objectionable by the intermixture therewith of the waste
gases or products of combustion.
By connecting the air outlet G¹ of an apparatus constructed as above described,
with the air inlet of a similar apparatus, I can heat the air in one apparatus by means
of the circulating water from the cylinder-jacket and in the other apparatus by
means of the waste gases or products of combustion. Or I can pass the air through
two or more of the said apparatuses heated either by the said water or by the products
of combustion.
I may discharge the heated air directly from the heating apparatus into the
chamber to be warmed or I may provide any convenient apparatus for utilizing the
heated air for warming or drying purposes.
Having now particularly described and ascertained the nature of the said inven
tion and in what manner the same is to be performed I declare that what I
claim is :-
:-
First. The method of utilizing the heat of the waste gases or products of com-
bustion from the cylinder of a gas or hydrocarbon engine, or of the water used for
cooling such cylinder, consisting in circulating the heating medium in contact with
one side of a series of metal tubes plates or the like whilst air is caused to circulate
on the other side of the said tubes, plates or the like, substantially as hereinbefore
described.
Second. The improved apparatus herein before described and shown in the
accompanying drawings, for heating air by means of the waste heat from a gas or
hydrocarbon engine, as, and for the purposes, specified.
Dated this 20th day of July
1000
GEORGE AUGUSTUS MOWER:
Haseltine, Lake & Co.,
45, Southampton Buildings, London, Agents for the Applicant.

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