design of plate type heat exchanger project ppt
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PROJECT ONPROJECT ONDESIGN OF PLATE HEAT EXCHANGERDESIGN OF PLATE HEAT EXCHANGER
Submitted bySubmitted by
AMBARISH PHATAKAMBARISH PHATAK
NINAD LATURKARNINAD LATURKAR
RAVI AWADERAVI AWADE
Guided byGuided by
Prof. G.G.DongreProf. G.G.Dongre
Introduction to heat exchangersIntroduction to heat exchangers
Modes of heat transferModes of heat transfer
1. Conduction1. Conduction
2 .Convection2 .Convection
3. Radiation3. Radiation
Introduction to heat exchangersIntroduction to heat exchangers
Classification based onClassification based on
1. Transfer process1. Transfer process
a) Direct contacta) Direct contact
b) Indirect contactb) Indirect contact
2. Flow arrangement2. Flow arrangement
a) Parallel Flowa) Parallel Flow
b) Counter Flowb) Counter Flow
c) Cross flowc) Cross flow
Different types of plate heat Different types of plate heat exchangersexchangers
1.1. Spiral type plate exchangerSpiral type plate exchanger
2.2. Plate-fin and tube type exchangerPlate-fin and tube type exchanger
3.3. Brazed plate-fin type exchangerBrazed plate-fin type exchanger
4.4. Plate-fin and tube type exchangerPlate-fin and tube type exchanger
Different types of plate heat Different types of plate heat exchangersexchangers
Brazed Plate-fin type
Plate-fin and tube type
Plate-frame type
Spiral plate type exchanger
PHE - main componentsPHE - main componentsCarrying bar
Pressureplate
Plate packTightening bolts
Frame plate
Frame Frame
Carryings bar in Aluminium or Painted carbon steelCarryings bar in Aluminium or Painted carbon steel Support columns in Aluminium or Painted carbon Support columns in Aluminium or Painted carbon
steelsteel Guiding bars in Stainless SteelGuiding bars in Stainless Steel
Carrying bars
SuppSupport ort
colucolumnsmns
Guiding Guiding barsbars
Frame Frame Tightening bolts to allow easy openingTightening bolts to allow easy opening
— — Bolt headBolt head
— — Bearing boxBearing box
— — Plastic coverPlastic cover
— — Lock washerLock washer
— — NutNut
— — Rolled threadRolled thread
Easy maintenanceEasy maintenance
One man can open One man can open and close a large PHE and close a large PHE using standard tools using standard tools
Serviceability Serviceability Less downtimeLess downtime SafetySafety Longer lifetimeLonger lifetime
smallersmaller
Carryings bar, Support columns and Guiding bar in AluminiumCarryings bar, Support columns and Guiding bar in Aluminium No roller needed due to low weight pressure plateNo roller needed due to low weight pressure plate
Round guiding Round guiding barbar
Support Support columncolumn
Round carrying bar
The Plate PackThe Plate Pack
Plate sizesPlate sizes
Plate geometriesPlate geometries
Plate - corrugation and Plate - corrugation and channelschannels
L: Low theta H: High theta
We have two plate corrugations (L and H)We have two plate corrugations (L and H)
L + L = L channels L + H = M channels H + H = H channels
These form three different channels (L, M and H)These form three different channels (L, M and H)
We choose between L, M and H channelsWe choose between L, M and H channels
Tailor-make it for the specific dutyTailor-make it for the specific duty
Plate - main componentsPlate - main components
Thin sheet design, cold formed in single step hydraulic pressing (up to 40000 tons)
Main heat transferarea
Distribution area
Suspension
Inlet / outlet Passing through
Gasket in gasket groove
Leak chamber
Plate - materialsPlate - materials Standard materials and thicknessesStandard materials and thicknesses
AISI 304 (stainless steel)AISI 304 (stainless steel)
Usually 0.4 or 0.5 mm thicknessUsually 0.4 or 0.5 mm thickness
Cheapest possible solutionCheapest possible solution
AISI 316 (stainless steel)AISI 316 (stainless steel)
Always 0.5 and 0.6 mmAlways 0.5 and 0.6 mm
Some with thicker plates (high-pressure applications)Some with thicker plates (high-pressure applications)
254 SMO (high-alloy stainless steel)254 SMO (high-alloy stainless steel)
Usually in 0.6 mm to allow stock-keepingUsually in 0.6 mm to allow stock-keeping
Titanium Titanium
Always 0.5 and 0.6 mmAlways 0.5 and 0.6 mm
Some with thicker plates (high-pressure applications)Some with thicker plates (high-pressure applications)
Some PHEs with 0.4 mm (low-pressure applications)Some PHEs with 0.4 mm (low-pressure applications)
Alloy C-276 (Nickel alloy)Alloy C-276 (Nickel alloy)
Usually in 0.6 mm to allow stock-keepingUsually in 0.6 mm to allow stock-keeping
100%
115%
250%
300%
600%
RelativePrice
Gasket - advanced sealing Gasket - advanced sealing systemsystem
...or glue-free gasket
that do not mix sealing and fastening function
Two component oven-
cured epoxy glue
“Roof-top”gasket profile
Supporting and protecting gasket
groove
Gasket material
from certified
suppliers
Homogeneous
rubber gasket
made in one piece
Gasket materialGasket material The choice of rubber material depends onThe choice of rubber material depends on
Fluids - chemical attack or notFluids - chemical attack or not
The combination of temperature and pressureThe combination of temperature and pressure
Rubber materials change properties due toRubber materials change properties due to
Time - the rubber relaxesTime - the rubber relaxes
Temperature - the rubber deterioratesTemperature - the rubber deteriorates
Hardening by attack of oxidising agents (e.g., Hardening by attack of oxidising agents (e.g., oxygen in air)oxygen in air)
Swelling or softening by absorption of Swelling or softening by absorption of chemicals in thechemicals in the fluids fluids
Gasket materialGasket material
Commonly used gasket materials:Commonly used gasket materials:1.1. Natural rubberNatural rubber2.2. Styrene-butadiene-SBRStyrene-butadiene-SBR3.3. NitrileNitrile4.4. ButylButyl5.5. Ethylene propelene rubberEthylene propelene rubber6.6. Flourinated rubberFlourinated rubber7.7. Compressed asbestos fibreCompressed asbestos fibre
Stacking of platesStacking of plates
Cold in
Hot out
Hot in
Cold out
Working principleWorking principle
End
Pla
te I
I
End
Pla
te I
Cha
nnel
pla
tes
Only 2 plates that do not transfer heat - the endplatesOnly 2 plates that do not transfer heat - the endplates
Problem statementProblem statement
Design a plate heat exchanger for 800 Kg/hr of Design a plate heat exchanger for 800 Kg/hr of deminaralized water that enters an exchanger at 50°C deminaralized water that enters an exchanger at 50°C and leaves the exchanger at 40°C. The heat will be and leaves the exchanger at 40°C. The heat will be transferred to 800 Kg/hr of seawater coming from transferred to 800 Kg/hr of seawater coming from supply at 33°C and leaving the exchanger at 42.9°C. A supply at 33°C and leaving the exchanger at 42.9°C. A 65 KPa pressure drop on demineralised water side and 65 KPa pressure drop on demineralised water side and 67 KPa on seawater side may be expended. Actual area 67 KPa on seawater side may be expended. Actual area of the heat exchanger is given that 318/322 m² and the of the heat exchanger is given that 318/322 m² and the number of plate should not be increases more than that number of plate should not be increases more than that of 173/175.of 173/175.
Also Given input data:Also Given input data: a = 1.84 m²a = 1.84 m² gap between the plates = b = 3.25*10-3 mgap between the plates = b = 3.25*10-3 m Channel width = w = 0.9367 mChannel width = w = 0.9367 m Channel height = H = 2.192 mChannel height = H = 2.192 m Connection diameter = 230 mmConnection diameter = 230 mm
Approach to solve the problemApproach to solve the problemTHERMALTHERMAL
Using LMTD method calculate the avg. heat load- Using LMTD method calculate the avg. heat load- “Q” and ∆Tm.“Q” and ∆Tm.
Find the heat transfer coefficient at both the Find the heat transfer coefficient at both the sides-primary and secondary.sides-primary and secondary.
Knowing the overall heat transfer coefficient, Knowing the overall heat transfer coefficient, calculate the total area needed by the formula:calculate the total area needed by the formula:
Q=K.A.∆TmQ=K.A.∆Tm Calculate the number of plates needed as the Calculate the number of plates needed as the
area of each plate is known.area of each plate is known. Check the pressure drop on both sides are in the Check the pressure drop on both sides are in the
required limits.required limits.
Approach to solve the problemApproach to solve the problemMECHANICALMECHANICAL
• TIGHTENING BOLTS:TIGHTENING BOLTS:
Material - SA 193-B7; Material - SA 193-B7;
Designed according to ASME CODE 8- table UCS-Designed according to ASME CODE 8- table UCS-2323
• FRAME AND PRESSURE PLATEFRAME AND PRESSURE PLATE
Material - SA 516-60;Material - SA 516-60;
Designed according to Section U2 and referred Designed according to Section U2 and referred table UCS-23 table UCS-23 and UG-23(c).and UG-23(c).
• STUD BOLTSTUD BOLT
Material – SA 193-B7Material – SA 193-B7
Testing procedure of pheTesting procedure of phe
EquipmentsEquipments Test proceduresTest procedures Examination Examination Acceptance standardAcceptance standard ReportsReports
ConclusionConclusion
Plate heat exchanger has an advantages as :Plate heat exchanger has an advantages as : Movable pressure platesMovable pressure plates VersatilityVersatility Lower liquid volumeLower liquid volume ExpandableExpandable DurabilityDurability ReliablityReliablity
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