Air Finned Heat Exchanger for Mechanical Seal

- BY EXPERT ENGINEERING COLLABORATION WITH SHANDILYA ENERGY SYSTEMS PVT LTD –

INDIA.

Introduction

Things to be discussed: Objective Standard Water Coolers Standard Air Fin Coolers What is Enhanced Air Finned Cooler Basic Concept Shandilya Enhanced Air Fin Cooler Advantage over Standard Water Cooled Heat

Exchanger Applications

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Objective

To describe some of our activities in the area of Air Finned Cooler technology.

To demonstrate that water cooling can be replacedby air cooling

Water Air

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Standard Water Cooler

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Water Cooled Heat Exchanger

WATER COOLING – DISADVANTAGES SCALING Heat Transfer Poor. Scale Should Be Removed

Periodically. The Material Becomes Weak In Scale

Removing Process. Cost Of Scale Removal. Cost Of Shut Down. Cost Of Water Cost Of Recirculation Of Water

Standard Air Fin Cooler

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Shandilya Enhanced Air Fin Cooler

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Shandilya Enhanced Air Fin Cooler

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Basic Concept

Condenser

Fins

Working Fluid

Vapour

Evaporator

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Working of Enhanced Air Finned Cooler.

It is filled with a liquid (the thermal transfer medium) appropriate to temperature of application.

The working fluid evaporates extracting heat from the process liquid

Vapour moves towards fin side of the tube wherein it dissipates heat to the ambient and condenses.

The condensed liquid comes back to the bottom portion.

The cycle repeats,

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What is Enhanced Air Finned Cooler ?

Sealed Chamber wherein a working Substance Evaporates and Condenses.

Passive device (No Moving Parts).

Extremely high, effective thermal conductivity (as much as 1,000 times that of Cu).

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TEMPERATURE UP TO 200degCModel: SEAFC30

TEMPERATURE 200 -280 degCModel: SEAFC60

TEMPERATURE ABOVE 280degCSEAFC90

Advantage over Standard Water Cooled Hear Exchanger

Standard Heat Exchanger 

Enhanced Air Finned Cooler

Cost of water is to be born all the time when the heat exchanger is on; the cost of water at the rate of 25lpm, @ Rs. 5/- per cubic meter is Rs. 65000/- (approx) per year. 

No water is required, so its saves the cost of Pumps, Valves and Water for circulation for cooling.

Dissolved salts in water get deposited on the outer surface of the tube and reduces thermal conductivity, due to this out-let temperature increases and may cause seal failure also water consumption increases after scale formation. 

Cooler efficiency remains almost constant.Possibility of seal failure due to temperature rise can be avoided. 

In coil type Heat Exchanger if the coil is not properly vented circulation stops causing mechanical seal failure. 

Self-venting, so no circulation required. 

Scaling/Fouling may create the un-schedule shut down of the pump that causes the production loss. The loss of one Un-Scheduled shut down may be between Rs. 50,000/- to Rs. 1,00,000. 

No un-scheduled maintenance due to cooler. 

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API Plan-21

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API PLAN 21

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API PLAN 21

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API Plan-23

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API Plan-23

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HEAT SOAKED CARBON STEEL ST.BOX

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Heat Soaked in Carbon steel St.Box

0

20

40

60

80

100

120

140 160 180 200 220 240 260 280 300 320 340 360

Fluid Temp. (Deg. C)

He

at

So

ak

ed

(k

ca

l/min

)

20mm

40mm

60mm

80mm

100mm

HEAT SOAKED STAINLESS STEEL ST.BOX

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Heat Soaked in Stainless Steel St.Box

0

5

10

15

20

25

30

35

140 160 180 200 220 240 260 280 300 320 340 360

Fluid Temp. (Deg. C)

He

at

So

ak

ed

(k

ca

l/min

)

20mm

40mm

60mm

80mm

100mm

HEAT GENERATED BALANCED SEALS

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Heat generated per 1000 RPM for Balanced Seals

0

2

4

6

8

10

12

14

16

18

5 10 15 20 25 30 35 40

Pressure (kg/cm2)

Hea

t g

ener

ated

(kc

l/min

)

20mm

40mm

60mm

80mm

100mm

HEAT GENERATED UNBALANCED SEALS

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Heat generated per 1000 RPM for Unbalanced Seals

0

2

4

6

8

10

12

14

16

18

1 2 3 4 5 6 7 8 9 10

Pressure (kg/cm2)

Hea

t g

ener

ated

(kc

l/min

)

20mm

40mm

50mm

80mm

100mm

Models of Enhanced Air Finned Cooler.

Model SEAFC30 suitable for API PLAN 52, API PLAN 53A, API PLAN 53B and API PLAN 53C

Model SEAFC30 suitable for API PLAN 23, API PLAN 21 below 200degC.

Model SEAFC60 suitable for API PLAN 21 up to 300degC.

Model SEAFC90 suitable for API PLAN 21 above 300degC.

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Data Sheet for Selection of Enhanced Air Fin Cooler

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Sr. No.

Parameter Unit

1. Media (Process Liquid)  

2. Process Liquid Temperature °C

3. Specific Gravity of Process Liquid  

4. Specific Heat of Process Liquid  

5. Seal Size- Inboard mm

6. Seal Size- Outboard mm

Data Sheet for Selection of Enhanced Air Fin Cooler

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Sr. No.

Parameter Unit

7. Vapour Pressure Kg/cm2

8. Stuffing Box Pressure Kg/cm2

9 API Plan  

10. RPM  

11. Barrier / Buffer Fluid  

12. Specific Gravity of Barrier Liquid  

13. Specific Heat of Barrier Liquid  

14. Maximum Ambient Temperature °C

Mechanical Seal manufacturing and reconditioning set up

We also do reconditioning job of Mechanical Seals & Spares and also we have in-house seal testing arrangement. We have a planning for Mechanical Seals manufacturing & repairs set up Projects around the World with local business associates.