Define Forced Draft And Induced Draft Cooling Towers?

Define Forced Draft And Induced Draft Cooling Towers?
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Answer :

If the fan is located at the bottom of the tower and air is blown by the fan up through the descending water it is called as forced draft cooling towers. If the fan is located at the top of the tower and airs enters through the louvers located on the tower’s side and drawn up and discharge through the fan casing, it is called as induced draft.
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Related questions

What Are The Advantages Of Induced Draft Cooling Tower Over Forced Draft Cooling Tower?

Description : What Are The Advantages Of Induced Draft Cooling Tower Over Forced Draft Cooling Tower?

Last Answer : 1. The outlet water comes in contact with the driest air and warmest water comes in contact with most humid air. 2. The re-circulation is seldom a problem. 3. The first cost is low due to the reduction in pump power consumption.

How Mechanical Draft Cooling Towers Are Classified?

Description : How Mechanical Draft Cooling Towers Are Classified?

Last Answer : Mechanical draft cooling tower is classified into three types: 1. Forced draft tower. 2. Induced draft counterflow tower. 3. Induced draft cross flow tower.

What Are The Advantages Of Hyperbolic Natural-draft Cooling Towers?

Description : What Are The Advantages Of Hyperbolic Natural-draft Cooling Towers?

Last Answer :  Since no fans are used power cost and auxiliary equipments cost is reduced.  Hyperbolic tower chimney creates its own draft even when there is no wind.  Ground fogging and warm air re-circulation are avoided in hyperbolic towers.  The structure is more or less self-supported.

Pick out the wrong statement pertaining to the cooling towers. (A) In case of induced draft cooling tower, the fan is placed at the top of the tower (B) Effectiveness of forced draft cooling tower is reduced by the recirculation of the humid and hot discharged air (C) A natural draft cooling tower is recommended to be used, when the air humidity is low and air temperature is also low (D) Effectiveness of a mechanical draft cooling tower is reduced with increase in air wet-bulb temperature

Description : Pick out the wrong statement pertaining to the cooling towers. (A) In case of induced draft cooling tower, the fan is placed at the top of the tower (B) Effectiveness of ... Effectiveness of a mechanical draft cooling tower is reduced with increase in air wet-bulb temperature

Last Answer : (D) Effectiveness of a mechanical draft cooling tower is reduced with increase in air wet-bulb temperature

Differentiate induced draft and forced draft cooling towers based on (i) Location of fan (ii) Corrosion of blades (iii) Efficiency (iv) Fan size

Description : Differentiate induced draft and forced draft cooling towers based on (i) Location of fan (ii) Corrosion of blades (iii) Efficiency (iv) Fan size

Last Answer : Differentiate induced draft and forced draft cooling towers based on (i) Location of fan (ii) Corrosion of blades (iii) Efficiency (iv) Fan size

How The Dry Type Cooling Towers Are Classified?

Description : How The Dry Type Cooling Towers Are Classified?

Last Answer : The dry type cooling towers are classified into two types ‘as follows: 1. Indirect dry type (or) Heller cooling system 2. Direct dry type-cooling system

How The Atmospheric (or) Natural Draught Cooling Towers Are Classified?

Description : How The Atmospheric (or) Natural Draught Cooling Towers Are Classified?

Last Answer : In atmospheric (or) natural cooling towers, the natural air provides the required cooling without the use of fans. This is classified into three types: 1. Natural draft spray filled towers. 2. Natural draft packed type towers. 3. Hyperbolic cooling towers.

Name Different Types Of Cooling Towers?

Description : Name Different Types Of Cooling Towers?

Last Answer : The cooling towers are classified as follows. According to the construction of material: 1. Timber for small tower 2. Ferro concrete for large capacity stations. 3. Multi deck concrete towers for ... air draught: 1. Atmospheric (or) Natural draught cooling system 2. Mechanical draught cooling tower.

What Is The Working Principle Of Cooling Towers?

Description : What Is The Working Principle Of Cooling Towers?

Last Answer : The hot water is sprayed from the top of the tower, while the air is made to flow from the bottom of the tower to the top. This air cools the hot water in the cooling tower. Air evaporates ... and leaves at the top of the tower and cooled water leaves at the bottom and recirculated to the condenser.

What Are The Factors That Affect The Rate Of Evaporation Of Water In Cooling Towers?

Description : What Are The Factors That Affect The Rate Of Evaporation Of Water In Cooling Towers?

Last Answer :  Amount of water surface area exposed.  The time of exposure.  The relative velocity of air passing over the droplets.  The RH of air.  The direction of airflow relative to water.

When the temperature and humidity of air is low, we usually use __________ draft cooling tower. (A) Natural (B) Forced (C) Induced (D) None of these

Description : When the temperature and humidity of air is low, we usually use __________ draft cooling tower. (A) Natural (B) Forced (C) Induced (D) None of these

Last Answer : (A) Natural

The most efficient cooling tower out of the following is (A) Induced draft (B) Forced draft (C) Natural draft (D) Atmospheric

Description : The most efficient cooling tower out of the following is (A) Induced draft (B) Forced draft (C) Natural draft (D) Atmospheric

Last Answer : (A) Induced draft

What Is The Use Of Draft Tube?

Description : What Is The Use Of Draft Tube?

Last Answer : The draft tube is used to regain the kinetic energy of water coming out of reaction turbine. It enables the reaction turbine to be placed over tailrace level.

What Are The Advantages Of Forced Draught System?

Description : What Are The Advantages Of Forced Draught System?

Last Answer :  Since the fan handles cold air, the fan size and the power required are less.  No need of water cooled bearings because the air being handled is cold air,  Pressure throughout the system is above atmospheric pressure so the air leakage into the furnace is reduced.

Write About Forced Draught System?

Description : Write About Forced Draught System?

Last Answer : In this system, the blower (forced draft fan) is located at the base of the boiler near the grate. Air is forced to the furnace by forced fan and the flue gases are forced to chimney through economizer and air preheater.

How The Induced Draught Is Working?

Description : How The Induced Draught Is Working?

Last Answer : In an induced draught system, a blower (induced draft fan) is placed near (or) at the base of the chimney. The fan sucks the flue gas from the furnace creating a partial vacuum inside the ... aid the combustion of fuel. The flue gases drawn by the fan passes through chimney, to the atmosphere.

What Is The Function Of Cooling System In Diesel Power Plant?

Description : What Is The Function Of Cooling System In Diesel Power Plant?

Last Answer : The function of cooling system is to remove heat from the engine cylinder to keep the temperature of the cylinder in low range and extend engine life.

Pick out the wrong statement. (A) With decrease in feed temperature, the number of plates required for binary distillation decreases for a given ‘L/V’ ratio (B) The extraction per unit of total height for a short packed column is more effective than for a tall column, in case of liquid-liquid extraction(C) Natural draft cooling towers are made of ferroconcrete and its cross￾section is wider at the bottom(D) Vander wall adsorption is also called chemisorption

Description : Pick out the wrong statement. (A) With decrease in feed temperature, the number of plates required for binary distillation decreases for a given L/V' ratio (B) The extraction per unit ... and its cross￾section is wider at the bottom (D) Vander wall adsorption is also called chemisorption

Last Answer : (D) Vander wall adsorption is also called chemisorption

. Improved cooling efficiency and minimum usage of material are the key features of ______ a. Natural draft cooling towers b. Cross flow towers c. Hyperbolic cooling d. All of above

Description : . Improved cooling efficiency and minimum usage of material are the key features of ______ a. Natural draft cooling towers b. Cross flow towers c. Hyperbolic cooling d. All of above

Last Answer : Hyperbolic cooling

. _____ type of cooling towers are used with nuclear power plants. a. Cross flow b. Natural draft c. Hyperbolic d. None of above

Description : . _____ type of cooling towers are used with nuclear power plants. a. Cross flow b. Natural draft c. Hyperbolic d. None of above

Last Answer : Hyperbolic

Hyperbolic cooling towers are also referred as a. Natural draft towers b. Cross flow towers c. Hyperboloid towers d. None of the above

Description : Hyperbolic cooling towers are also referred as a. Natural draft towers b. Cross flow towers c. Hyperboloid towers d. None of the above

Last Answer : Hyperboloid towers

Hyperbolic cooling towers have become design standard for all natural draft structural towers because usage of . a. Their structural strength b. Minimum usage of material. c. Improving cooling efficiency d. All of the above.

Description : Hyperbolic cooling towers have become design standard for all natural draft structural towers because usage of . a. Their structural strength b. Minimum usage of material. c. Improving cooling efficiency d. All of the above.

Last Answer : All of the above.

Natural draft cooling towers are mainly used in the _____. • Steel industry • Fertilizer industry • Alumina industry • Power stations

Description : Natural draft cooling towers are mainly used in the _____. • Steel industry • Fertilizer industry • Alumina industry • Power stations

Last Answer : Power stations

__________ Cooling towers have become the design standard for all natural-draft cooling towers because oftheir structural strength and minimum usage of material. • HCT • CCT • Hyperboloid • None

Description : __________ Cooling towers have become the design standard for all natural-draft cooling towers because oftheir structural strength and minimum usage of material. • HCT • CCT • Hyperboloid • None

Last Answer : Hyperboloid

Natural draft in hyperbolic cooling towers reduces of fans a) Damage b) Efficiency c) Cost d) Speed

Description : Natural draft in hyperbolic cooling towers reduces of fans a) Damage b) Efficiency c) Cost d) Speed

Last Answer : c) Cost

Describe with neat sketch working of natural draft cooling towers.

Description : Describe with neat sketch working of natural draft cooling towers.

Last Answer : Natural draft cooling tower: -In natural draught cooling tower, the circulation of air is produced by the pressure difference of air inside the tower and outside atmospheric air Hot cooling water falls down ... the pressure difference of air inside and outside of cooling tower (natural flow).

Flue gas from the heating chamber of byproduct coke ovens is removed by (A) Forced draft fan (B) Induced draft fan (C) Steam ejector (D) Natural draft

Description : Flue gas from the heating chamber of byproduct coke ovens is removed by (A) Forced draft fan (B) Induced draft fan (C) Steam ejector (D) Natural draft

Last Answer : (D) Natural draft

In a forced draft cooling tower, water is cooled from 95 to 80°F by exposure to air with a wet bulb temperature of 70°F. In this case, the (A) Range is 15°F (B) Approach is 10°F (C) Both (A) & (B) (D) Neither (A) nor (B)

Description : In a forced draft cooling tower, water is cooled from 95 to 80°F by exposure to air with a wet bulb temperature of 70°F. In this case, the (A) Range is 15°F (B) Approach is 10°F (C) Both (A) & (B) (D) Neither (A) nor (B)

Last Answer : (C) Both (A) & (B)

Pick out the wrong statement. (A) Different solids have different equilibrium moisture curves (B) Total condenser or reboiler is considered equivalent to one theoretical plate in McCabe-Thiele method of theoretical plate calculation for distillation column (C) Heat removal load on cooler remains constant, even with increase of the reflux ratio in a distillation column (D) Even a forced draft cooling tower cannot cool water below the wet bulb temperature

Description : Pick out the wrong statement. (A) Different solids have different equilibrium moisture curves (B) Total condenser or reboiler is considered equivalent to one theoretical plate in McCabe-Thiele method of ... (D) Even a forced draft cooling tower cannot cool water below the wet bulb temperature

Last Answer : (C) Heat removal load on cooler remains constant, even with increase of the reflux ratio in a distillation column

In a forced draft cooling tower, water is cooled from 95 to 80°F by exposure to air with a wet bulb temperature of 70°F. In this case, the (A) Range is 15°F (B) Approach is 10°F (C) Both (A) & (B) (D) Neither (A) nor (B)

Description : In a forced draft cooling tower, water is cooled from 95 to 80°F by exposure to air with a wet bulb temperature of 70°F. In this case, the (A) Range is 15°F (B) Approach is 10°F (C) Both (A) & (B) (D) Neither (A) nor (B)

Last Answer : (C) Both (A) & (B)

Define Fertile Materials And Breeding In Reactors?

Description : Define Fertile Materials And Breeding In Reactors?

Last Answer : There are materials like U 235 and Th232 which are not fissile but can be converted into fissile materials by the bombardment of neutrons. Such materials are known as fertile materials. The process of converting more fertile material into fissile material in a reaction is known as breeding.

Define Multiplication Factor Of A Fission Process?

Description : Define Multiplication Factor Of A Fission Process?

Last Answer : k =number of neutrons of any one generation/number of neutrons of immediately preceding generation.

Define Load Factor?

Description : Define Load Factor?

Last Answer : Load factor is defined as the ratio of average load to the peak load (or) maximum demand.

Define Load Curve?

Description : Define Load Curve?

Last Answer : Load curve is a graphical representation between load in kW and time in hours. It. shows variation of load at the power station. The area under the load curve represents the energy generated in a particular period.

Define Demand Factor?

Description : Define Demand Factor?

Last Answer :  Demand factor is defined as the ratio of maximum demand to connected load.  Connected load is the sum of ratings in kW of equipment installed in the consumer’s premises.  Maximum demand is the maximum load, which a consumer uses at any time.

Define The Term Natural Draught And What Are The Advantages Of Natural Draught System?

Description : Define The Term Natural Draught And What Are The Advantages Of Natural Draught System?

Last Answer : The tall chimney creates the natural draught by the temperature difference between hot gases in the chimney and cold atmospheric air outside the chimney. The advantages are:  No external power is required ... at high level.  No maintenance cost.  Capital cost is less than artificial draught.

Define Draught, What Is The Use Of Draught In Thermal Power Plants?

Description : Define Draught, What Is The Use Of Draught In Thermal Power Plants?

Last Answer : Draught is defined as a small pressure difference required between the fuel bed (furnace) and outside air to maintain constant flow of air and to discharge the gases through chimney to the atmosphere ... To draw the combustion products through the system. To remove burnt products from the system

Define The Term Waste Heat Recovery?

Description : Define The Term Waste Heat Recovery?

Last Answer : Waste heat is the heat which is not at all used and exhausted out as a waste product. Waste heat is normally available from the industry in the form of process steam and water at high ... industries. This heat can be recovered for useful purpose. This process is known as waste heat recovery.

Define Bleeding In Steam Power Plant?

Description : Define Bleeding In Steam Power Plant?

Last Answer : Assume I kg of steam is expanded in the turbine. Before complete amount of steam is expanded, some amount of steam (m kg) is extracted ‘Extracting the steam in the turbine before exhaust is called bleeding. This bled steam is used to heat the feed water.

Define Turbo Charging In Combined Gas Turbine And Diesel Cycles?

Description : Define Turbo Charging In Combined Gas Turbine And Diesel Cycles?

Last Answer : In the combined cycle, the exhaust gas from the diesel engine is expanded in the turbine, which is coupled with compressor which supplies pressurized air to the diesel engine. This increases diesel engine output. This arrangement is known as turbo charging.

The equipment frequently used for adiabatic humidification-cooling operation with recirculating liquid is (A) Natural draft cooling tower (B) Induced draft cooling tower (C) Spray chamber (D) None of these

Description : The equipment frequently used for adiabatic humidification-cooling operation with recirculating liquid is (A) Natural draft cooling tower (B) Induced draft cooling tower (C) Spray chamber (D) None of these

Last Answer : (C) Spray chamber

Explain the construction and working of induced draft cooling tower with neat sketch.

Description : Explain the construction and working of induced draft cooling tower with neat sketch.

Last Answer : Induced draft cooling tower :  Diagram: Construction and working: Cooling towers are employed to cool utility cooling water by direct contact with air. The parts of a cooling tower are ... top pulls the hot air through the fills and cooled water gets collected in the cold water basin.

Name The Coolants Commonly Used For Fast Breeder Reactors?

Description : Name The Coolants Commonly Used For Fast Breeder Reactors?

Last Answer :  Liquid metal (Na (or) Na K)  Helium (He)  Carbon dioxide.

What Is Breeding In Nuclear Reactor?

Description : What Is Breeding In Nuclear Reactor?

Last Answer : The process of producing fissionable material from a fertile material such as uranium 238 (U 238) and thorium 232 (Th 232) by neutron absorption is known as breeding.

What Are The Advantages Of Gas Cooled Reactor Nuclear Power Plant?

Description : What Are The Advantages Of Gas Cooled Reactor Nuclear Power Plant?

Last Answer : 1. Fuel processing is simple. 2. The use of C02 as coolant completely eliminates the possibility of explosion in reactor. 3. No corrosion problem.

State Some Advantages Of Pressurized Water Reactor?

Description : State Some Advantages Of Pressurized Water Reactor?

Last Answer :  The pressurized water reactor is compact  In this type, water is used as coolant; moderator and reflector water is cheap and available in plenty)  It requires less number of control rods.

Name The Different Components Of Nuclear Reactor?

Description : Name The Different Components Of Nuclear Reactor?

Last Answer : 1. Nuclear fuel 2. Moderator 3. Control rods 4. Reflectors 5. Reactor vessel 6. Biological shielding 7. Coolant

What Is Meant By Nuclear Fission?

Description : What Is Meant By Nuclear Fission?

Last Answer : Uranium exists in different isotopes of U 238, tP34 and U 235. Out of these, EP35 is most unstable. When unstable heavy nucleus is bombarded with high-energy neutrons, it splits up roughly ... neutrons are released and a large amount of energy is produced. This process is called nuclear fission.

What Are The Different Types Of Load Acting On The Chimney?

Description : What Are The Different Types Of Load Acting On The Chimney?

Last Answer : Its own weight which is considered to act on single vertical force acting through the centroid The wind pressure, which is considered to act on the horizontal force acting on the centroid of vertical projected area.

What Is The Purpose Of Control Rods?

Description : What Is The Purpose Of Control Rods?

Last Answer : The control rods are used to start the chain reaction, maintain the chain reaction at required level and to shut down the reactor during emergency.