Green Mechanic

Cornish boiler is a simple horizontal boiler which belong to the shell and tube class of boilers. Cornish boiler is much like the Lancashire boiler.  Cornish boiler has the ability to produce steam at the rate of 1350 kg/hr and can take the maximum pressure of about 12 bar.  Dimensions of the Cornish boiler shell is 4 m to 7 m in length and 1.2 m to 1.8 m in diameter. Cornish boiler is a fire tube type of boiler that is hot gases flow in tubes and water surround these tubes in shell. Parts of Cornish boiler Tubes These are present inside the shell and hot gases flow through them. Shell A big shell which contain water inside it as well as tubes. Heat transfer between hot gases and water is take place here Side flue Flue are the tubes which take hot gases after they passes out from the fire tubes. Flue present at side of the horizontal shell are called side flues. Bottom flue Flue present at the bottom of the shell is called bottom flue. Bottom flue take the smoke

LANCASHIRE BOILER is a simple horizontal boiler and belong from the shell and tube types of boilers.  It has a circular shell connected to end plates supported by gusset plates.  It has a circular shell connected to end plates supported by gusset plates.  Lancashire boiler have two fire tubes whose length is equal to length of the boiler and diameter of the fire tube is less than half of the diameter of the shell.  LANCASHIRE BOILER DIAGRAM LANCASHIRE BOILER DIAGRAM You can read our other article to know all about  Locomotive boiler Parts, Working and Applications  and  Cornish Boiler: Parts, Working, Advantages, & Disadvantages Parts of LANCASHIRE BOILER Grate Grate contain the fuel for combustion Feed valve Feed valve is used to enter fuel material inside the grate Fire hole Fire hole is used to introduce the initiating fire spark  Safety valve Safety valve is used to release the pressure when it crosses the safety limits of the boiler Bottom flue Flu

COCHRAN BOILER is a fire tube boiler which is just like the simple vertical boiler with some changes to increase the efficiency of the boiler by increase maximum heating area of the boiler.  Maximum heating are of the Cochran boiler is 10 to 20 times greater than that of the simple vertical boiler. There are two basic changes made in simple vertical boiler in order to make it Cochran boiler. One is the introduction of cylindrical shell and second is the hemispherical crown.  Hemispherical crown have more strength and give maximum area for the specific mass of the fuel, it also increase the radiant heat absorption. Parts of the Cochran boiler Ash pit Ash pit contain the ashes of the fuel material after the complete combustion Grate Grate contain the fuel for combustion Feed check valve Feed check valve is   used to check the level of fuel material inside the grate Fire hole Fire hole is used to introduce the initiating fire spark Flue pipe Flue pipe take the hot gases from the hemisph

Q) How to calculate volume of a pipe in barrel if data is available in following units 

Hydraulic Pump pressurizes the water by transferring its mechanical energy to the water and forces it to move while motor uses the mechanical energy and pressure of flowing water to produce its rotation Energy conversion Motor convert the electrical energy into mechanical energy whereas pump does not convert any form of energy it only transfer its mechanical energy to fluid mechanical energy Type of mechanism Motor is a driver that is a driving mechanism and make the other mechanism moves for example pump whereas pump is driven that is it need a mechanism to rotate itself for example motor Device type Motor can be an electrical device or hydraulic device whereas pump is pure hydraulic device Input Input of pump is always mechanical energy whereas input of motor can be electrical energy of kinetic energy (in hydraulic motor) Output Output of motor is always a mechanical energy whereas output of pump is kinetic and pressure energy of

Water Tube boiler and Fire Tube Boiler Structure of Fire tube boiler vs water tube boiler Both are shell and tube type of boiler, fire tube have hot gases inside the tube while water tube have water inside the tube and hot gases surrounding them Steam pressure of  water tube boiler vs Fire tube boiler Steam pressure limit of the fire tube boiler is lies between 20-30 bar and the pressure limit of the water tube boiler is much more than the fire tube boiler and is unlimited within the design limits Unit output Fire tube boiler and water tube boiler unit output of the boilers mainly depends on the design limits. Unit output of the fire tube boiler is 20 MW and that of the water tube boiler is unlimited Fuel of  water tube boiler and Fire tube boiler On both fire tube and water tube boiler any type of fuel can be used for providing the heat. Fire tube mostly used commercial fuel and treated wast while in water tube you can used any fuel available  Efficiency of Fire tu

simple vertical boiler is one whose axis of orientation is vertical with respect to the ground. it is a fire tube or a water tube boiler. Parts of simple vertical boiler Ash pit Grate Feed check valve Fire hole Fire box Cross box Hand hole fire box  Fusible plug Water gauge Cylindrical shell Steam space Manhole Pressure gauge Steam stop valve Safety valve Uptake Chimney Working of simple vertical boiler In a simple vertical boiler fuel is added through the fire hoke into the grate which burn there to produce the hot gases. fuel when converted into ash is collected into the ash pit.  Hot gases rises above and pass their heat to the water in the cross box and go out of the boiler through the chimney.  Water heats up and steam production starts. steam which produce as a result of water heating is collected at the steam space of the boiler. steam is collected until a certain pressure is attain and then steam is passed out for use like running turbine or e