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AEROSPACE ENGINEERING LABORATORY (MAE308)
PROF. SEUNG WOOK BAEK DEPARTMENT of AEROSPACE ENGINEERING, KAIST, IN KOREA
ROOM: Building N7-2 #3304 TELEPHONE : 3714 swbaek@kaist.ac.kr http://procom.kaist.ac.kr
TA : Donggi Lee ROOM: Building N7-2 #1304 TELEPHONE : 5754 kingdonggi@kaist.ac.kr
PROF. SEUNG WOOK BAEK DEPARTMENT of AEROSPACE ENGINEERING, KAIST, IN KOREA
ROOM: Building N7-2 #3304 TELEPHONE : 3714 swbaek@kaist.ac.kr http://procom.kaist.ac.kr
TA : Donggi Lee ROOM: Building N7-2 #1304 TELEPHONE : 5754 kingdonggi@kaist.ac.kr
PROPULSION AND COMBUSTION LABORATORY AEROSPACE ENGINEERING LABORATORY
MAE 308
Contents
A. Objective
B. Necessity
C. Background
Measurement of Heat Release usingBomb Calorimeter
PROPULSION AND COMBUSTION LABORATORY AEROSPACE ENGINEERING LABORATORY
MAE 308
Objective
Purpose of Experiment
• Measurement of the calorific value of reactants
Calorific Value
Change of state
Chemical reaction
Formation of a solution
Measurement !!
PROPULSION AND COMBUSTION LABORATORY AEROSPACE ENGINEERING LABORATORY
MAE 308
Necessity
Bomb Calorimeter
• In combustion process
Ex-per-imen
t
• Combustion of fuel• Measurement of the exchange of heat
Analysis
• Thermal characteristic analysis• Calculation of calorific value
Ap-pli-
cation
• Fundamental data for chemical energy
PROPULSION AND COMBUSTION LABORATORY AEROSPACE ENGINEERING LABORATORY
MAE 308
Necessity
Heat Transfer
• The process of reaching thermodynamic equilibrium
PROPULSION AND COMBUSTION LABORATORY AEROSPACE ENGINEERING LABORATORY
MAE 308
Necessity
Predicting Unknown Substances
• By experiments (Calorimeter)- Fuel testing- Propellant and explosive testing
∆ 𝑬Products
KnownUnknown
Prediction
PROPULSION AND COMBUSTION LABORATORY AEROSPACE ENGINEERING LABORATORY
MAE 308
Background
The First Law of Thermodynamics
“ Energy can be neither created nor destroyed during a process ; it can only change forms”
• Energy is conserved in any chemical reaction.
where = heat added to system(positive) = internal energy= work done by system
PROPULSION AND COMBUSTION LABORATORY AEROSPACE ENGINEERING LABORATORY
MAE 308
Background
Closed System
( internal combustion engine, etc.)
• For constant volume process ()» Internal energy change
𝜹𝑾=∫𝟏
𝟐
𝑷𝒅𝑽
𝜹𝑸=𝒅𝑬+𝑷𝒅𝑽
𝜹𝑸=𝒅𝑬
PROPULSION AND COMBUSTION LABORATORY AEROSPACE ENGINEERING LABORATORY
MAE 308
Background
Open System
( pump, turbine, compressor etc.)
• For constant pressure process ()» Enthalpy change
𝜹𝑾=∫𝟏
𝟐
𝑽𝒅𝑷
𝜹𝑸=𝒅𝑯 −𝑽𝒅𝑷
𝜹𝑸=𝒅𝑯
PROPULSION AND COMBUSTION LABORATORY AEROSPACE ENGINEERING LABORATORY
MAE 308
Background
Calorimetry
• The measurement of heat is generated (exothermic process) or consumed (endothermic process) during a chemical reaction or event involving heat transfer.
PROPULSION AND COMBUSTION LABORATORY AEROSPACE ENGINEERING LABORATORY
MAE 308
Background
Calorimeter
• In many cases, the study of heat exchange is measured with an apparatus called a calorimeter.
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