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Log Mean Temperature Difference (LMTD) Method with Examples

Logarithmic Mean temperature Difference is used to measure the Heat transfer rate in double pipe heat exchanger. The rate of heat transfer is got from the formula - Q = U.A.LMTD . U= Heat Transfer Co-efficient A= Heat Transfer Surface Area LMTD= Mean Temperature Difference LMTD is the logarithmic temperature difference between the hot and cold fluids passing through the each ends of heat
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Stress Strain Graph for Mild Steel explained

Stress: When any object of certain material is subjected to tensile or compressive or shear force, there may be a chance that its dimension will be affected. If the dimension of a material is changed due to application of forces we can say that the material is under stress or experiencing the state of stress. Stress is defined as the Force per unit cross section area. Stress = F/A Stress is
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A Low-Cost EggPlotter

Features Plots on spheres and eggs, similar to the EggBot Uses low-cost components (total cost around 25 €) Software is written as an Arduino sketch But: NOT as accurate as the original EggBot Introduction I have admired the idea of the EggBot for quite some time. The original device is an art project of Bruce Shapiro, apparently conceived in 1990. Read about the history of it
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Plastic Extrusion Process Principles

Extrusion Process Principles Extrusion process is very common in the plastic industry. It is used for high volume plastic production. In extrusion process the color pigments along with other performance enhancing additives are combined with resin which is then pushed through the rotating screws. The heat and pressure generated within the barrels of screw is dispersed and melts the plastic
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Different Types of Plastics- Advantages and Disadvantages

Plastics can be classifies into two broad categories - Thermosets and Thermoplasctics. A brief description of these two classes will be discussed here. Thermosets are the kind of plastics which are not recyclable. They undergo a kind of chemical change at the time of heating. As a result they can be shaped once because of this permanent chemical change. This process is known as heat hardening.
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Diferent Parts of Sand Mold- Features

Cope and drag in Sand Mold : Cope and Drag are the two parts of the casting flask. Cope is the upper part and drag is the lower part. Even if the casting process is flaskless , the same terms are used for the upper ans lower parts. Generally the flask is made of wood or metal. It contains molding sand. When metal is poured into the mold cavity the flask supports the mold. Gating system:
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Lost Wax or Investment Casting Method Steps

Investment or lost-wax castings: The Lost-wax method, sometimes, also called simply as precision-investment casting has been used for many years by jewelers and dentists. Since world-war-II, the method has been adapted to the production of small and precise, industrial fasting. Basically, the method involves the use of expendable (heat disposable) pattern unrounded with a shell of refractory
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