Waste heat recovery helps in mcq

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

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Waste heat recovery helps in mcq

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. Carousel Previous. Carousel Next. What is Scribd? Academic Documents. Professional Documents.

Questions: 45 Attempts: 15, Updated: May 9, Explanation A micro-hybrid system is primarily used for Start and Stop Technology. The heat recovered from the flue gas is utilized to preheat the boiler feed water.

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. Compressed air. Flue gasses.

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.

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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The heat recovered from the flue gas is utilized to preheat the boiler feed water. Carousel Next. Multiple Choice. Explanation A hybrid vehicle does not have to be charged every km. A topping cycle plant generates electricity or mechanical power first. User Settings. Waste heat recovery systems are designed to capture and utilize waste heat generated by various processes or systems. Carousel Previous. Explanation Waste heat recovery in the industry offers a major advantage of both reducing pollution and increasing efficiency. Semi-conducting materials, such as bismuth telluride or lead telluride, are commonly used in thermoelectric generators because they possess these desired properties. The most consumers of heat at low or medium temperature are supplied with heat using as energy carrier: a.

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Carlson, and Allan P. What is a typical efficiency of a cogeneration system? 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. By combining different renewable energy sources, the system can maximize energy production and ensure a continuous and reliable power supply. This technology is commonly used in various applications such as industrial machinery, automotive systems, and aerospace. Therefore, all three options can be classified as advanced WHR technologies. The efficiency of a stand-alone gas turbine without any heat recovery system will be in the range of. More Power Engineering Questions Q1. Browse from millions of quizzes. Popular Topics. Rate this question:. Explanation Sir William Robert Grove is the correct answer because he is credited with developing the first fuel cell in