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

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

1 Answer

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.
by

Related questions

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 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.

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 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.

Define Forced Draft And Induced Draft Cooling Towers?

Description : Define Forced Draft And Induced Draft Cooling Towers?

Last 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 ... on the tower's side and drawn up and discharge through the fan casing, it is called as induced draft.

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.

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.

Which cooling Towers use a process similar to the one found in small evaporation active cooling units a) hyperbolic b) Tower c) condensate loop d) none of these

Description : Which cooling Towers use a process similar to the one found in small evaporation active cooling units a) hyperbolic b) Tower c) condensate loop d) none of these

Last Answer : a) hyperbolic

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.

What Is The Necessity Of Automatic Controls For Feed Water?

Description : What Is The Necessity Of Automatic Controls For Feed Water?

Last Answer : The electrical load on power plant varies irregular manner. The automatic man control provided at a steam power plant successfully meets over the variable load. The automatic control for feed water is necessary sine the supply of feed water depends upon plant load.

Name Some Of The Automatic Controlling Methods For Feed Water?

Description : Name Some Of The Automatic Controlling Methods For Feed Water?

Last Answer : 1. Single element pilot operated system 2. Single element self operated system 3. Two element pilot operated system 4. Three element pilot operated system

Name Different Methods Used To Extract Steam For Heating The Feed Water?

Description : Name Different Methods Used To Extract Steam For Heating The Feed Water?

Last Answer :  Direct contact heater  Drain pump method  All drains to hot well  Cascade system

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.

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.

What Is The Working Principle Of Magneto Hydrodynamic Power Plant?

Description : What Is The Working Principle Of Magneto Hydrodynamic Power Plant?

Last Answer : The working principle of MHD is as like that of dynamo. Instead of solid conductor high temperature plasma is passed through the magnetic field at sonic speed. When the gas is passed through magnetic field, current is induced. Electrodes collect this induced current.

Name The Different Types Of Mhd Generators?

Description : Name The Different Types Of Mhd Generators?

Last Answer :  Open cycle MHD  Closed cycle MHD  Closed cycle MHD with liquid metal

What Are The Advantages Of Sodium In Fast-breeder Reactors?

Description : What Are The Advantages Of Sodium In Fast-breeder Reactors?

Last Answer :  Sodium has very low absorption cross-sectional area.  It possess good heat transfer properties at high temperature and low pressure.  It does not react with any of the structural materials used in primary circuits.

What Are The Demerits Of Breeder Reactor?

Description : What Are The Demerits Of Breeder Reactor?

Last Answer :  Highly enriched fuel is required  Control is difficult and expensive  Safety must be provided against melt down  Handling of sodium is a major problem

What Are The Advantages Of Breeder Reactors?

Description : What Are The Advantages Of Breeder Reactors?

Last Answer :  It gives high power density than any other reactor.  High breeding is possible.  High burn-up of fuel is achievable.  The operation of the reactor is not limited by Xe poisoning.

What Are The Advantages Using Co2 As Coolant?

Description : What Are The Advantages Using Co2 As Coolant?

Last Answer :  Gases do not react chemically with the structural materials.  Gas can attain any temperature for a particular pressure.  They do not absorb neutron.  The leakage of gas will not affect the reactivity.  The gas coolant provides best neutron economy.

Name Few Types Of Reactors?

Description : Name Few Types Of Reactors?

Last Answer : Fast reactors, Thermal reactors, natural fuel reactors, Enriched Uranium reactors, water moderated reactors, heavy water moderated reactor, graphite moderated reactor, gas cooled reactors and Sodium cooled reactors.

What Are The Desirable Properties Of A Coolant?

Description : What Are The Desirable Properties Of A Coolant?

Last Answer :  It should not absorb neutron  Have high chemical and radiation stability  Non-corrosive  Have high boiling point  Non-toxic

What Are The Desirable Properties Of A Good Moderator?

Description : What Are The Desirable Properties Of A Good Moderator?

Last Answer :  It must be as light as possible It must slow down the neutron as quick as possible.  It must have resistance to corrosion.  It must have good machinability.  It must have good conductivity and high melting point.

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.

What Are The Requirements To Sustain Fission Process?

Description : What Are The Requirements To Sustain Fission Process?

Last Answer :  The bombarded neutrons must have sufficient energy to cause fission.  The number of neutrons produced must be able to create the rate of fission.  The fission process must generate energy.  The fission process must be controlled.

Write About Isotopes Of An Element?

Description : Write About Isotopes Of An Element?

Last Answer : Some elements have the same number of protons in the nucleus but different number of neutrons. As a result, these elements have the same atomic number but different mass number. Such type of elements ... mass numbers due to different number of neutrons, are known as in the isotopes of an element.

Write About Atomic Number?

Description : Write About Atomic Number?

Last Answer : The nucleus contains protons and neutrons. The number of protons in a given atom is an atomic number (Z). The atomic number for H is 1 and He is 2.

What Is The Need Of Depreciation Cost?

Description : What Is The Need Of Depreciation Cost?

Last Answer : Depreciation cost is the amount to be set aside per year from the income of the plant to meet the depreciation caused by the age of service, wear and tear of the machinery and equipments. Depreciation amount collected every year helps in replacing and repairing the equipment.

What Includes Operating Cost?

Description : What Includes Operating Cost?

Last Answer : Operating cost includes the following cost.  Cost of fuel  Cost of operating labour,  Cost of maintenance labours and materials.  Cost of supplier like Water for feeding boilers, for condenser and for general use.  Lubrication oil and, grease.  Water treatment chemicals.

What Includes Fixed Cost?

Description : What Includes Fixed Cost?

Last Answer : Fixed cost includes the following cost. 1. Cost of land 2. Cost of building 3. Cost of equipment 4. Cost of installation 5. Interest 6. Depreciation cost 7. Insurance 8. Management cost

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.

State The Objective Of Boiler Trial?

Description : State The Objective Of Boiler Trial?

Last Answer :  To determine the thermal efficiency of the boiler when working at a definite pressure.  To draw up heat balance sheet for the boiler to check the performance of the boiler.

What Is Meant By Boiler Trial?

Description : What Is Meant By Boiler Trial?

Last Answer : Steam is generated in boilers under certain conditions of feed water and exists as steam while a certain amount of fuel is burnt. To study the performance of boiler, some experiments are conducted by ... for a certain length of time and recording the data. This procedure is known as boiler trial.

Write About Boiler Mountings?

Description : Write About Boiler Mountings?

Last Answer : The devices used for the efficient operation, proper maintenance, and safe operation boiler mountings. The different boiler mountings are: 1. Water gauge (or) water level indicator 2. Pressure gauge (or) steam gauge 3. Safety valves 4. Fusible plug 5. Stop valve 6. Blow off cock 7. Feed check valve.

What Is The Use Of Air Preheater?

Description : What Is The Use Of Air Preheater?

Last Answer : Air pre heater is used to transfer heat from the flue gases to the air before it passes into the furnace for combustion. It is placed between the economizer and chimney. The overall efficiency of the plant may be increased by 10 per cent by the use of air preheater.

What Are The Methods Adopted To Remove So2 From Due Gases?

Description : What Are The Methods Adopted To Remove So2 From Due Gases?

Last Answer : 1. Wet scrubbing 2. Solid adsorbent 3. Catalytic oxidation

What Are The Appliances Known As Boiler Accessories?

Description : What Are The Appliances Known As Boiler Accessories?

Last Answer : The appliances used to increase the efficiency of the boiler are known as boiler accessories. The important boiler accessories are: 1. Economizer 2. Super heater 3. Air preheater 4. Feed pump 5. Injector

What Is The Purpose Of Automatic, Combustion Control?

Description : What Is The Purpose Of Automatic, Combustion Control?

Last Answer : The main purpose of automatic combustion’ control system is to maintain load against demand, to prevent smoke, to increase boiler house efficiency, to carry out routine adjustments and to provide interlocking safe guards.

Write About Co2 Recorders?

Description : Write About Co2 Recorders?

Last Answer : In thermal power plants, it is necessary to keep the concentration Of CO2 is low is necessary as possible. To achieve this, a constant recording of concentration Of CO2 These recorders ... different principles, as given below.  Thermal conductivity cell  Chemical absorption cell  Density balance

What Are The Methods Adopted To Remove’ S02 Flue Gases?

Description : What Are The Methods Adopted To Remove’ S02 Flue Gases?

Last Answer : 1. Wet scrubbing 2. Solid absorbent 3. Catalytic oxidation