Improvements in and connected with Ventilating Apparatus.
Year: 1899

page_text: Date of Application, 19th July, 1899
Complete Specification Left, 16th May, 1900-Accepted, 19th July, 1900
PROVISIONAL SPECIFICATION.
Improvements in and connected with Ventilating Apparatus.
We, The Honourable CHARLES ALGERNON PARSONS, Engineer, and ALFRED
QUINTIN CARNEGIE, Engineer, both of Heaton Works, Newcastle-on-Tyne, in
the County of Northumberland, do hereby declare the nature of this invention
to be as follows:-
Our invention relates to ventilating apparatus, and is principally applicable
to ventilating apparatus used for mines. It is specially suitable for applica-
tion when a steam turbine is used for operating the ventilating fans.
Our object is to improve the condensing arrangements of the engines driving
ventilating fans, and further to improve upon the method of supplying or
exhausting air from mines by means of fans operated by the steam turbine.
One part of our invention consists in utilising the air moved by the ventilating
fans for the purpose of condensing the exhaust steam from the fan engines, by
causing the air to pass through either an air cooled condenser, or through a
condenser in which a small quantity of water is used, the water being evapo-
rated to produce the necessary cooling by the passage of the air current.
Another part of our invention consists in placing fans operated by a steam
turbine in parallel on the air current. Two or more fans may be so placed,
and they are preferably attached to the opposite ends of a steam turbine
spindle.
In carrying our invention into effect, in accordance with the first part, we
place an air-cooled dry condenser or evaporative air-cooled condenser in the
drift either before or after the propelling apparatus utilised in a mine, and we
couple up the exhaust of the steam turbine, used to propel the air, with the
said condenser. By this arrangement greatly increased condensing power is
obtained. In applying the invention also in conjunction with mine machinery,
we prefer to place the air condenser in the uptake shaft, or in the drift leading
to the fan or in the exit of the fan. As we have said, either evaporative or
dry condensers may be used. In the latter case. of course a much larger cooling
surface is required, but in either case the necessary surface is very much reduced,
as compared with that required when the condenser is not placed in the
manner we have described. This part of our invention thus consists in com-
bining an air-cooled condenser, whether evaporative or dry, with ventilating
machinery for mines, placing the condenser in the air drifts, as described. The
evaporative condenser, or the dry air condenser, may be of any well-known
type, and operated with steam turbine and fan of any of my constructions.
In carrying our invention into effect, in accordance with the second part, we
arrange a steam turbine of one of my well-known types between two fans, one
fan being placed at each end of the turbine on the turbine spindle. We allow
room for conical passages leading to the fan casing. The air discharges from
each fan to a round elbow, and each elbow carries expanding conical pipes. The
air from the upcast is thus divided, and discharged separately by the two fans.
More than two fans may be used, so long as the fans operate in parallel on the

page_text: air. This arrangement of placing two or more fans in parallel on the air, the
fans being driven from opposite ends of the turbine, has the advantage of allow-
ing smaller diameters of fans, and a greater angular velocity of turbine move-
ment for the total air given at a specified water gauge.
Dated this 10th day of Tulu 1809
MARKS & CLERK,
18, Southampton Buildings, London, W.C.,
13, Temple Street, Birmingham, and 25, Cross Street, Manchester,
Agents.
Improvements in and connected with Ventilating Apparatus.
We, The Hon. CHARLES ALGERNON PARSONS, Engineer, and ALFRED
QUINTIN CARNEGIE, Engineer, both of Heaton Works, Newcastle-on-Tyne, in
the County of Northumberland, 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:
Our invention relates to ventilating apparatus and is principally applicable
to ventilating apparatus used for mines. One part of our invention is specially
suitable for application when a steam turbine is used for operating the ventilating
fans. Another part of our invention is only intended for use with steam
turbines.
Our object is to improve the condensing arrangements of the engines driving
ventilating fans, and further to improve upon the method of supplying or
exhausting air from mines by means of fans operated by the steam turbine.
One part of our invention consists in utilising the air moved by the ventilating
fans for the purpose of condensing the exhaust steam from the fan engines, by
causing the air to pass through either an air cooled condenser, or through a
condenser in which a small quantity of water is used, the water being evapo-
rated to produce the necessary cooling by the passage of the air current.
Another part of our invention consists in placing fans operated by a steam
turbine in parallel on the air current. Two or more fans may be so placed,
and they are preferably attached to the opposite ends of a steam turbine
spindle.
Referring now to the accom
companying drawings:
Figures 1 and 2 illustrate in sectional plan and sectional elevation respectively
one modification of our invention as applied to a mine.
Figure 1 is a section on the line AB of Figure 2 and
Figure 2 is a section on the line CD of Figure 1.
In carrying the first part of our invention into effect according to this modifi-
cation, we place an air cooled dry condenser or evaporative condenser in the
upcast so that the air is drawn through it by the fans. This condenser is
shown diagrammatically at «. The exhaust steam from the propelling tur-
bine which may be of any of the Parsons' well known types, is led by the
exhaust pipe c to the condenser and is there condensed. The evaporative or
dry condenser may be of any well known type. A much larger cooling surface
is required in a dry condenser than in an evaporative condenser, but in both
cases the necessary surface is very much reduced as compared with that required
when the condenser is not placed in the current of air as described. Instead
of placing the condenser as shown in Figure 1 we may place it quite close to
and in front of the fans or in the exit or exits from the fans.

page_text: This part of our invention thus consists in combining an air cooled con-
denser, whether evaporative or dry, with ventilating machinery for mines,
placing the condenser in the air drifts as described.
In carrying the second part of our invention into effect according to one
modification, we place a fan d on each side of the turbine both fans being
on the turbine spindle. We allow room for conical passages e leading to the
fan casing. The air discharges from each fan to a rounded elbow f which leads
to an expanding conical pipe g. The air from the upcast is divided, part going
along the duct to one fan and part along the duct k to the other fan.
Instead of using only two fans, we may employ a greater number so long as
the fans operate in parallel on the air. This arrangement of placing two or
more fans in parallel has the advantage of allowing smaller diameters of fans
and a greater angular velocity of turbine movement for the total air given at a
specified water gauge.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that
what we claim is:-
1. The combination of an air cooled dry condenser or evaporative condenser
with a steam turbine or other engine and ventilating fans, whereby the air
drawn or propelled by the fans is employed to condense the exhaust steam from
the engine, substantially as described.
2. The combination of a steam turbine with two or more ventilating fans,
the fans being adapted to operate in parallel on the air for the purpose of
enabling a higher velocity to be given to the turbine, substantially as described.
3. The arrangement and combination of a steam turbine with two or more
ventilating fans, the fans being arranged on both ends of the turbine spindle
and adapted to operate in parallel on the air for the purpose of enabling a
higher velocity to be given to the turbine, substantially as described.
101
1000
MARKS & CLERK,
18, Southampton Buildings, London, W.C.,
13, Temple Street, Birmingham, and 25, Cross Street, Manchester,
Agents.