Showing posts from July, 2014

Types of boilers

There is no specific way in which you can classify a boiler but according to the little knowledge we have classified boilers into seven main classes. Types of Boilers Boilers are classified in several classes based on things like their design, working, features and applications. Following are the types of boiler Orientation of the shell Utility of the boilers Heating system Tube content Type of fuel Circulation method Way of heating According to the Orientation of the shell Base upon the orientation of the shell with respect to ground boiler can be classified into three types Simple Vertical boilers Simple Horizontal boilers Simple Inclined boilers According to the Utility of the boilers Base upon the Utility boilers can be classified into two main types Stationary boilers Portable boilers Recommended  Boiler Mounting and Accessories According to the Heating system According to the place from which liquid in the boiler is heated, boilers are classified into two main types Externally fi

Flash and Double flash geothermal power plant

Flash and double flash geothermal power plant make use of the water that is between 300 to 700 F. Flash and double flash is the name given to this power plant because of its working phenomena Parts of the Flash and Double flash geothermal power plant Geothermal vent A deep well is drilled into the surface of the well to extract hot water from the geothermal source called geothermal vent Steam tank Water from the geothermal source is taken into the tank where some of it is converted into the steam and some into the boiling water. High pressure separator Steam tank have boiling water and high pressure steam together at same place. High pressure separator separates the steam from the water and forwards the steam to the turbine and water toward low pressure separator Low pressure separator Boiling water from the high pressure separator in move to the low pressure separator after passing through the throttling valve. Low pressure separator separates th

Binary cycle Geothermal Power Plant

Binary cycle is the type of geothermal power plant which works with the water having the temperature below 400 F and uses the concept of heat exchanger to transfer the heat of hot water to relatively low boiling liquid, which then converted into vapor face. This high pressure vapors then used by the turbine to produce the electricity Parts of Binary cycle Geothermal Power Plant Geothermal vent It is a deep drilled hole which starts from the surface of the earth and end at the geothermal source. High pressure superheated water moves from the source towards the surface through the pipes. Heat exchanger This part of the Binary cycle Geothermal Power Plant differentiates it from the other types of the geothermal power plants. Heat exchanger is the device which exchanges the heat between two liquids flowing in different pipes at different temperature. Turbine Turbine is the part which converts the pressure energy of the fluid into the kinetic energy. Rotating

Direct dry steam geothermal power plant

Direct dry steam geothermal power plant is the o ldest type of the geothermal power plant which uses the steam taken directly from the geothermal source. Direct dry steam geothermal power plant is the simplest and the most efficient type of geothermal power plant Parts of direct dry steam geothermal power plant Geothermal vent Geothermal vent is a well drilled from the surface of the earth to the geothermal source to extract the steam energy from their up to the turbine of the geothermal power plant. Steam tank Steam from the geothermal source is first introduce into the tank where hot water is converted into the steam therefor it is also called steam tank Separator After the steam tank there is a separator which removes all the unwanted particles from the steam which could damage the turbine. Turbine After the separator steam strike the turbine which convert the pressure energy into the kinetic energy of the generator Generator Rotation energy transfer by the

Investment Casting (Lost Wax Process)

Investment casting is expandable mold metal casting process which is also known as lost wax process because the pattern is made up of wax and is melted away when it is heated. Wax is recovered and can be used again and again that’s why this process is called investment casting process. Steps involve in investment casting Step 1  First and most unique step is the making of the patter which is of wax. A few number of pattern are attached to the wax sprue Step 2 Pattern attached to wax sprue is then fully dipped in the refractory material tank so that it is fully covered by the refractory material. It is them drayed to make it rigid Step 3  Pattern is now inverted and heated to remove the wax from it. After the removal of the wax patter is now hollow from inside and metal can be poured in it Step 4 To remove all the contaminants from the mold it is heated at very high temperature and them hot molten metal is poured into it and then kept for a long

Shell Molding

Shell molding is the expandable mold metal casting process in which mold is a thin shell of sand held together by the binder usually a thermosetting resin. It was invented by the German in about 1940s. Thickness of the shell mold is about 9 mm Steps involves in Shell molding Step 1 A metal plate is used to make the pattern. Shape of the patter is like the shape of shell mold you need. Metal plate is heated and they fixed on a container containing the sand and the thermosetting resign. Step 2 Container is inverted so that the sand and thermosetting resign may came into contact with each other. Heated plate melts the resign and makes a shell of sand around the pattern. Step 3 In order to remove the extra sand and uncured resign container is reposition again and plate is detached from it Step 4 Shell made is not properly cured yet so it is heated in a heater for proper curing. Step 5 After proper curing shell mo

Kaplan Turbine : Parts, Working, Advantages and Disadvantages

Kaplan turbine is from the reaction turbine categories of hydraulic turbine. Kaplan turbine is name after its inventor Viktor Kaplan. It was the first hydraulic turbine which work in low head and high flow rate.  Kaplan turbine is also known as the propeller turbine because its blades are just like propeller and working phenomena is same but opposite in direction and this make Kaplan turbine fit for use in rivers and low head area. Its recommended to read our article on Francis Turbine and Pelton Wheel Turbine to know all about their parts, working and advantages and disadvantages.  Parts of Kaplan Turbine Hub Hub is the part on which blades of the turbine are attached which is attached to the central shaft of the turbine Blades Blades of the Kaplan turbine are like the propeller. Blades of other axial turbine are planer but that of Kaplan are not planer instead they are of twist shape along the length to allow the swirling flow of water at entrance and exist. Guide vanes or wicket