A boiler may have waste gases leaving the installation when artificial draught is used at 450 K . The natural draught chimney is of 50 m height. The hot gases within chimney are at temperature of 600 K and air requirement is 15 kg per kg of fuel burnt. The atmospheric air is at 27 C temperature and mean specific heat of hot gases is 1.0032 kJ/kg.K. The calorific value of fuel burnt is 32604 kJ/kg. Determine (a) the efficiency of chimney, (b) the extra heat carried away by flue gases per kg of fuel.

Q: Moist air at 30oC and 50% relative humidity is cooled to 10oC. If the air has a volumetric flow rate…

A: Given:Moist air inlet condition, Tdb,1=30oC, ϕ1=50%Final temperature of the air, Tdb,2=10oCThe…

Q: Air flowing at 2 kg / s has a dry ball temperature of 55 C and a wet bulb temperature of 30 "C,…

A:

Q: He equipment room housing the compressor and condenser of a refrigerant ammonia system has…

A: Dimension=5 by 4 by 3 Time =1/2

Q: Column A Column B A1 Digestion B1 the absence of oxygen. thermal decomposition of biomass occurring…

A: Digestion: Anaerobic digestion takes place in absence of oxygen where bacteria breaks down biomass…

Q: Calculate the EER rating of a 20 ton (240000 Btu) air conditioning unit with an average electrical…

A: given that , BTU=240000 electric load =30kW                     =30000W we know that , EER(energy…

Q: An atmospheric cooling tower is to provide for the jacket water of a four stroke, 800 KW diesel…

A: Given that,The objective of this question is to determine the cooling water supplied to the diesel…

Q: EXAMPLE 5: 1.5 m 3 s -1 of moist air at a state of 28°C dry-bulb, 20.6°C wet-bulb (sling) and…

A:

Q: Auditorium Hall is to be maintained at a temperature of 24 C dry bulb temperature and 60 % relative…

A:

Q: When two quantities of air having different properties are mixed, the fin conditions depends on the;…

A: To select the correct options.

Q: Air at lol-325K Pa barometric pressure, dry bulb temperature of 20°C and wet buib tem perature f…

A:

Q: In sensible heating or cooling process, it is the dry bulb temperature of  air being varied either…

A: Sensible coolingSensible cooling is the removal of heat from the air without changing the moisture…

Q: 15- For a pipe carrying chilled water at 10°C through a room at 21°C. What is the maximum relative…

A: Here we will infer value from steam table and use th to get maximum relative humidity

Q: Steam generated at a pressure of 600 kPa (abs), at a temperature of 500°C and at a rate of 10 kg/s…

A:

Q: Example 9. Moist air at 20°C dry-bulb and 8°C thermodynamic wet-bulb temperature is to be processed…

A:

Q: QUESTION 1 1.1A boiler plant generate steam at a pressure of 13,5 bar and with a temperature of…

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Q: What is amount of entropy generation "kJ/K" during the condensation of a 2.8 kg of a pure substance…

A: Solutions Heat rejected during condensation Q=mh=2.8×1024.04=2867.312kJ/kg

Q: process to air, determine the ( | velocity, and (. pressure, ( Mach number at the exit of the…

A: Given: Fuel is burnt in a tubular combustion chamber with compressed air. TO determine Exit…

Q: A room is to be maintained at a state of 20 celsius degree dry-bulb and 50 percent saturation by a…

A: Given: The dry bulb temperature of the room initially, Tdb1 = 20oC The relative humidity, w1 = 50%…

Q: A product having a moisture content of 60% (wet basis) is dried in a tunnel-type dryer at a rate of…

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Q: Analyze the thermal power plant carefully and list all burn out products which are harm full for the…

A: Thermal power plants are known to pump out a lot of greenhouse gases and ash, which are by-products…

Q: 50 lb. and the At the instant shown (0-60°), the kid has a velocity of 10 ft/s. The weig weight of…

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Q: What is the pollutant volume fraction in the gas?

A: Given Data⇒ Pollutant volume fraction

Q: 2. Humid air at 35o C and a pressure of 1 atm and with 98% relative humidity enters a condenser in…

A: Given: Properties of humid air  T1=35oCP=1 atmRelative Humidity φ=98%Tcond=15oC=288…

Q: Consider a boiler that burns sub-bituminous coal. The boiler has a cyclone furnace burner and has a…

A: Given : P = 500 MW C = 25 MJ/kg To find : Annual emissions of mercury

Q: Evaluate the dryness fraction (quality) of steam which has 1.5 kg of water in suspension with 60 kg…

A: quality of steam is a fraction that measures the mass fraction of steam in mixture

Q: following nditiol Outdoor dry-bulb temperature 40 °C Outdoor wet-bulb temperature 20 °C Expected…

A:

Q: What are the design parameters for the various equipment and components (includes the table of…

A: Design parameters for equipment and components in a refrigeration and cryogenic plant for liquid…

Q: What is amount of entropy generation "kJ/K" during the condensation of a 3.1 kg of a pure substance…

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Q: and (d) heavy fuel oil at 25°C

A: Given              Flow rate, Q = 6.6667 x 10-5 m3/s For, heavy fuel oil at 25°C    Kinematic…

Q: 2. A spray drier is used to dry skim milk to a final moisture content of 5.00%. The air entering the…

A: The original water content of the milk is 90.5% The final water content is 5 %. Initial temperature…

Q: A dehumidifier brings in saturated wet air (100 percent relative humidity) at 30°C and 1 atm,…

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Q: Heat exchanger is device that facilitate the exchange of heat between two fluids that are at…

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Q: How much much heat must be supplied to water at 180 degrees celcius to make 1 kg of wet steam at…

A: Given              Mass, m = 1 kg  Temperature, T1 = 180oC        Pressure, P = 9000 kPa Find…

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Conduction and Convection

When energy travels from one object to another it is said to have undergone heat transfer. Heat transfer is nothing but the transfer of thermal energy or internal energy from one thing to another, like e.g., when a vessel with water, kept on top of a burner, heats up because of the flame underneath it.