Category Archives: Thermal Engineering

Thermal Engineering textbook

Why cooling system required for I.C engines


Description about cooling system, type of cooling systems, description, advantages and disadvantages about  air cooling, liquid cooling, thermo syphon cooling, pump cooling, thermostat cooling, pressurized water cooling, evaporative cooling In I.C engine, during the cycle inside the cylinder the temperature of the gases range approximately between 350 C to 27500 C If external cooling is […]

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Internal combustion (I.C) engine formulas for calculations


How internal combustion engine work effectively to convert chemical energy to mechanical energy is depends on various parameters, those are Power & mechanical efficiency Mean effective pressure & torque Specific output Volumetric efficiency Fuel air ratio Specific fuel consumption Thermal efficiency and heat balance Exhaust smoke and other emissions Specific weight Power & mechanical efficiency […]

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Important point of Spark ignition (S.I) and Combustion ignition (C.I) engines


Spark ignition and combustion ignition engines important points, simple description and applications with practical examples Spark ignition (S.I) engine key points Otto cycle is used in S.I engines Petrol is used as fuel Air fuel ratio in these engines is between 10:1 to 20:1 Compression ratio maximum value is 11, average value is between 7 […]

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Two stroke cycle petrol engine operation description


Description about operation of two stroke cycle engine in diagram and important points with p-v diagram in simple way. Complete the cycle with two strokes only Ports are used to bring the fuel in to the engine cylinder and exhaust gases are brought into outside from engine cylinder to outside Operation of two stroke cycle […]

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Diesel engine four stroke cycle operation description

Description about operation of Diesel four stroke cycle engine in diagram and important points in simple way. Only Air enter in to the engine cylinder inlet valve Fuel injector is used to inject the fuel in to the engine cylinder in proper proportion In this cycle operation is completed by four strokes as described bellow […]

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Otto four stroke cycle engines – petrol engines


Description about operation of otto four stroke cycle engine in diagram and important points in simple way. Air and fuel mixed in proper ratio and enter in to the engine cylinder Spark plug is used to produce spark, which is used to burn the air-fuel mixture Therefore this engine is called spark ignition engine In […]

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I.C Engines basics & important names and description

Basic and important names and description about I.C Engines in simple way to understand are like about Bore, Stroke, T.D.C, B.D.C, Clearance volume, swept volume, compression ratio, piston speed.   Bore Engine cylinder inside diameter is called bore Stroke Piston moves up and down in the engine cylinder The maximum displacement of the piston can […]

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Types & Applications of Internal Combustion Engines (I.C Engines)


Types and Applications of I.C Engines with practical example are given bellow Based on cycle of operation: 1.Two stroke engines 2.Four stroke engines Based on Cycle of combustion 1.Otto cycle engine 2.Diesel cycle engine 3.Dual combustion engine Based on arrangement of cylinders 1.Horizontal engine 2.Vertical engine 3.V-type engine 4.Radial engine Based on type of Ignition […]

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Laws of Thermodynamics key points, description & examples

Main key points, description, examples and explanation of Thermodynamics Laws Zeroth law, First law, Second law and Third law areas described bellow   Zeroth law of Thermodynamics Zeroth law is explains that when two bodies are in same temperature then brought third body together with fist two bodies, after some time three bodies are in […]

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Introduction of Thermodynamics & Basic Concepts


Thermodynamics is defined as a science describes the relation between heat, work and systems properties which are in equilibrium. Mainly four laws involve in Thermodynamics those are Zeroth law, First law, Second law and Third law Types of System’s in Thermodynamics System is defined as a set of partials in the substance Example for system […]

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