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The simplest way to calculate the requirement of duty if you know the mass flowrate of one stream and the temperature difference (heating or cooling) you would like. For example if one wants to heat 5 gallons/hr Tri Ethylene Glycol (TEG) from 225 to 325 degrees F. Now, 5 gallons = 5*0.1556 = 0.78ft3 using density of 8.8lb/ft3 = 0.78(ft3)*8.8(lb/ft3) = 6.85lbs. 1. Find out the Heat Capacity (Cp) for TEG at 225 deg C = 0.6Btu/lb.F 2. Calculate Duty Q = m.Cp.dT = 6.85(lb)*0.6(Btu/lb.F)*(325-225)(F) =410.7Btu Answer: For heating 5 gallons per hour TEG from 225 to 325 F, the duty required is 411Btu/hr.
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What is a occupational duty?
Occupational duty means to stick with one type of occupation.
What is formula for boiler efficiency?
boiler efficiency calculation methods:Input-output methodη = Output / Input Output is defined as the heat that is absorbed by working fluid. Input is defined as the chemical heat of fuel plus the heat that is added to working fluid, air, gas and other fluid circuit in which the fluid circuit across thin layer.Heat Loss MethodHeat loss method is the method that is used to calculate the percentage amount of heat which is not useful. This method is very effective used in an attempt to find potential savings of boiler with heat balance. There are several factors act as the source of heat loss combustion. These factors will be used to calculate boiler efficiency based on heat loss method. The source of heat loss can be seen as following below:a. Heat loss due to dry flue gasHeat loss due to dry flue gas is the heat loss which is contained in dry flue gas such as CO2, O2 and N2. These gases are one of causes of heat loss in combustion process. The high temperature of flue gas coming out from boiler affect amount of heat loss.The weight and heat loss of dry flue gas of combustion of coal can be calculated as following formula:Wdfg = mCO2 + mSO2 + mO2 + mN2Eloss dfg = Wdfg x Cp x (To - Ts)Where:Wdfg = weight of dry flue gas (kg/kg coal)Eloss dfg = heat loss in dry flue gas (kJ/kg)To = temperature of dry flue gas coming out from boilerTs = temperature of surroundingby Gajanan Nalegaonkar
How many heat transfer zone in boiler?
convective and radiant heat transfer
What is the percentage of time a welding machine can be used continuously?
The percentage of time a welding machine can be used continuously is typically referred to as its duty cycle, which is often expressed as a percentage over a 10-minute period. For example, a machine with a 60% duty cycle can be used for 6 minutes of welding followed by 4 minutes of cooling. Duty cycles vary based on the type of welding machine and its specifications, with common values ranging from 20% to 100%. Always refer to the manufacturer's guidelines for the specific duty cycle of a given machine.
Does stainless steel reflect heat?
yes
What is heat duty?
heat duty refers to the heat exchangers. heat duty of the heat exchangers is defined as the amount of heat transfered of 1kg of hot fluid to the 1 kg of cold fluid in one hour.
What is heat exchanger duty?
The duty of a heat exchanger can be defined in an easy way as "The amount of heat exchanged from a fluid at a higher temperature to the fluid at lower temperature in unit time by a heat exchanger is called its duty"
How do you calculate customs duty in India?
custom duty on glass imports from Pakistan to India
How do you calculate the load bearing capacity of scaffolding?
Before you can calculate the load bearing capacity of a scaffold, you will need to know there are three types of scaffolding; light duty, medium duty, and heavy duty. Now you can calculate the load bearing capacity by using the height to base ratio.
What instrument can be used to calculate specific heat capacity?
A calorimeter is commonly used to calculate specific heat capacity. This device measures the heat transfer in a system when a material undergoes a temperature change, allowing for the determination of specific heat capacity.
What are the ratings and certificates for In the Heat of the Night - 1988 By Duty Bound 8-3?
In the Heat of the Night - 1988 By Duty Bound 8-3 is rated/received certificates of: Australia:M
What do you need to know to calculate the heat needed to melt a block of ice at its melting point?
To calculate the heat needed to melt a block of ice at its melting point, you need to know the mass of the ice block, the specific heat capacity of ice, and the heat of fusion of ice (or latent heat of fusion). The formula to calculate this heat is Q = m * ΔHf, where Q is the heat energy, m is the mass, and ΔHf is the heat of fusion.
How can we calculate the heat flow into the gas?
To calculate the heat flow into a gas, you can use the formula Q mcT, where Q is the heat flow, m is the mass of the gas, c is the specific heat capacity of the gas, and T is the change in temperature.
What is heat rate of steam turbine How to calculate heat rate of steam turbine?
manish
What do you-values calculate?
Heat transfer... describes how well a building element conducts heat
How you calculate heat input and traveling speed for Gas Metal Arc Welding?
How you calculate heat input and traveling speed for Gas Metal Arc Welding?
How do you calculate the heat of combustion for a given substance?
To calculate the heat of combustion for a substance, you can use the formula: Heat of combustion (mass of substance) x (heat capacity) x (change in temperature). This formula helps determine the amount of heat released when a substance undergoes complete combustion.
