Marcet Boilerx - 123SeminarsOnly

thoughtgreenpepperMechanics

Oct 27, 2013 (3 years and 7 months ago)

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DUBLIN INSTITUTE OF
TECHNOLOGY

Marcet Boiler

Thermodynamics Lab
















Name:

Shiyas Basheer





No:

D10119909

Date:
3/19/2012






Course:

DT022/2




Page |
1



Table of Contents

Aim:

................................
................................
................................
................................
................................
..........

2

Apparatus:
................................
................................
................................
................................
............................

2

Procedure:
................................
................................
................................
................................
............................

2

Results:
................................
................................
................................
................................
................................
...

3

Conclusion:
................................
................................
................................
................................
...........................

4




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2



Marcet Boiler

Aim:

To

show the connection between pressure and temperature of saturated steam.

Apparatus:

A

marcet boiler was used. It was provided with a pressure gauge, Digital
thermometer and a safety valve.

The main elements of the WL 204 unit were:
-



The stainless steel s
team boiler with a mineral wool insulating jacket.



The filler opening to pour water into the boiler.



The overflow valve to ensure the vessel was filled to the correct level.



The drain valve to drain the vessel.



An electric heater bolted on to the floor o
f the boiler.



A manometer fitted on the lid of the boiler to provide a direct indication of the boiler
pressure.



A temperature sensor



A safety valve, a digital display, a master switch and a heater switch to switch the
heater on and off.

Schematic:




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3



Procedure:

Before starting the experiment a quick inspection was performed to
ensure the unit is in

proper operating condition
.

The

boiler was filled before the unit
was run for the first time. The water was heated and brought
to
the boiling point with
the

overflow valve opened. When the steam was seen coming from the overflow
valve it was closed. This was to ensure that there was no air in the boiler. With the
valve shut the boiler was further heated and the pressure was raised. Temperature
corresponding t
o the various pressures was recorded at 0.5 bar intervals up to 15
-
bar
pressure.

Results:

Pressure, P (bar)

Temperature, T

Saturated
temperature, T



Gauge

Absolute

0
C

K

0
C

K

Average
Temp. K

0

1

102

375.15

99.6

372.75

237.375

0.5

1.5

106.8

379.95

111.4

384.55

245.675

1

2

115.2

388.35

120.2

393.35

254.275

1.5

2.5

123.1

396.25

127.4

400.55

261.825

2

3

129.4

402.55

133.5

406.65

268.025

2.5

3.5

134.4

407.55

138.9

412.05

273.225

3

4

139.6

412.75

143.6

416.75

278.175

3.5

4.5

143.9

417.05

147.9

421.05

282.475

4

5

147.6

420.75

151.8

424.95

286.275

4.5

5.5

151.7

424.85

155.5

428.65

290.175

5

6

155

428.15

158.8

431.95

293.475

5.5

6.5

158.2

431.35







6

7

160.9

434.05

165

438.15

299.525

6.5

7.5

164

437.15







7

8

166.5

439.65

170.4

443.55

305.025

7.5

8.5

169.1

442.25







8

9

171.3

444.45

175.4

448.55

309.925

8.5

9.5

173.8

446.95







9

10

175.7

448.85

179.9

453.05

314.375

9.5

10.5

177.8

450.95







10

11

179.8

452.95

184.1

457.25

318.525

10.5

11.5

182.1

455.25







11

12

183.8

456.95

188

461.15

322.475

11.5

12.5

185.5

458.65







12

13

187.3

460.45

191.6

464.75

326.025

12.5

13.5

188.8

461.95







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4



13

14

190.5

463.65

195

468.15

329.325

13.5

14.5

192.2

465.35







14

15

193.7

466.85

198.3

471.45

332.575


Conclusion:

In this
experiment, the relationship between pressure and temperature is found to be

directly proportional. When compared to the theoretica
l
result
, the experimental
result

shows a small deviation between them because of certain e
rrors. The percentage of
error ran
ged from 0.3% to 44% which can validate this experiment
.



Insulation

Thermometer

Vent valve

Pressure Gauge

Bunsen burner