Waste heat recovery helps in mcq

Which of the following depends on physical properties of fluids as well as geometry of the heat exchanger?

B a Fixed carbon b Volatile matter c Hydrogen d All of the above 23 Which one of the following boilers utilizes the combination of suspension and A grate firing? Oxidation of CO to CO2 will yield a kCal b kCal c kCal d kCal 48 The maximum loss that takes place in a fully condensing steam turbine power D plant is a Flue gas loss b Steam distribution loss c Radiation and insulation loss d Condenser losses 49 The difference between mean solid and mean gas velocity in FBC boiler is called B a Fluidization factor b Slip velocity c Settling velocity d Terminal velocity 50 Which one of the following is a high temperature heat recovery device? Then the type of co- generation is called as: a gas turbine b diesel generator c topping cycle d bottom cycle 73 1. Open navigation menu. Close suggestions Search Search. User Settings. Skip carousel.

Waste heat recovery helps in mcq

How good are you at mechanical engineering? You can take these emerging trends in mechanical engineering MCQ quiz to check your knowledge of the latest technologies. With this test, you will get to learn new things also, along with practice. So, take the quiz and keep yourself updated with the emerging trends in mechanical engineering. The more you score, the more is your knowledge. Do share your result with friends and see who gets a better result. Here's an interesting quiz for you. Search Speak now. This team includes our in-house seasoned quiz moderators and subject matter experts. Our editorial experts, spread across the world, are rigorously trained using our comprehensive guidelines to ensure that you receive the highest quality quizzes. Learn about Our Editorial Process. Quizzes Created: 1 Total Attempts: 15,

Combined and simultaneous production of power and mechanical work. Fouling coefficient. In order for this process to work efficiently, a material with good electrical conductivity and poor thermal conductivity is required.

The most efficient solution of heat supply at low and medium temperature is: a. Using a fuel that is directly combusted in the energy consuming equipment. Using electricity. The most consumers of heat at low or medium temperature are supplied with heat using as energy carrier: a. Water in different forms.

With most of the world committed to limiting global warming to 1. As we approach the end of , we have only six years left to implement many decarbonization levers. But industrial companies are often uncertain about the right technical path to immediately reduce emissions. Technologies that are net present value NPV positive and quick to implement, such as various types of energy efficiency measures, can help companies achieve their decarbonization goals. Recovering waste heat is a potential avenue to effectively reducing emissions. Every year, the world consumes over exajoules EJ —or , terawatt-hours TWh —of final energy, mainly by burning fossil fuels and generating heat. Part of this generated heat is harnessed for useful purposes, such as producing electricity or driving chemical reactions, but most is unused. Recovering this waste heat can greatly reduce the use of primary fuels and, therefore, emissions. Recovered waste heat could also make the energy transition easier and more economical. Recovered heat can be used for industrial process heating purposes, city grid heating, or converted to electricity determined by local energy demand patterns as well as prices of fuels and electricity.

Waste heat recovery helps in mcq

Of this, around one third is wasted. This wasted heat can be lost to the atmosphere at all stages of the process; through inefficient generation, transmission or final use of that energy. Waste heat recovery aims to minimize the amount of heat wasted in this way by reusing it in either the same or a different process. Waste heat can be recovered either directly without using a heat exchanger—e. Direct heat recovery is often the cheaper option but its use is restricted by location and contamination considerations. In indirect heat recovery, the two fluid streams are separated by a heat transfer surface, which can be categorized as either a passive or active heat exchanger. Passive heat exchangers require no external energy input e. When considering waste heat recovery, the key question is always that of financial justification: "How much money will be saved?

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This helps to reduce energy consumption and operating costs, making it an ideal choice for billet reheating furnaces. A thermoelectric generator converts waste heat directly into electricity. They are particularly effective in recovering waste heat from exhaust gases or other low-temperature heat sources. Explanation The correct answer is "All of the above. Mechanical Engineering Trivia Quiz. Shell and tube exchangers and run around coil exchangers may also be used in certain applications, but they are not typically used in the pressurizing section of a dairy plant. Open navigation menu. Explanation A hybrid vehicle does not have to be charged every km. Subject Verb Agreement 3. Important Exams.

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Hybrid vehicles use a combination of an internal combustion engine and an electric motor to power the vehicle. Explanation A steam trap is a valve designed to sense the difference between steam and condensate and drain the condensate from the line. Heat pumps, heat wheels, and none of the above options are not capillary wick structures. Sodium azide NaN3 decomposes to produce nitrogen gas, potassium nitrate KNO provides oxygen to support the reaction, and silicon dioxide SiO2 acts as a catalyst. It works by cyclically absorbing and releasing heat, allowing for efficient heat transfer between the two streams. This technology helps improve fuel efficiency and reduce emissions, making them popular choices among environmentally conscious drivers. Explanation Fuel cells are electrochemical devices that convert the chemical energy of a fuel, such as hydrogen, into electrical energy. Have an account? They are particularly effective in recovering waste heat from exhaust gases or other low-temperature heat sources. Browse from millions of quizzes. Explanation A heat pipe is a capillary wick structure.