SPPU Question Papers for EE (PPE): Unit 2A Steam Condenser

SPPU Question Papers

Class: BE Mechanical

Subject: Energy Engineering

Unit 2 A: Steam Condenser

March 2016

Q. 3. b) The following observations were recorded during a test on surface condenser:         Condenser vacuum = 70 mm of Hg;

            Barometer reading = 76.5 cm of Hg;

            Mean condenser temperature = 35°C;

            Hot well temperature = 28°C;

            Condensate collected = 1800 kh/hr;

            Air leakage = 1 kg/ton of steam;

            Cooling water circulated = 70 ton/hr;

            Cooling water inlet temperature = 27°C.

            Calculate:

            i) Vacuum efficiency

            ii) Condenser efficiency. [5 marks]

(OR)

Q. 4.   Short note on: [10 marks]

            a) Down flow surface condenser &

            b) Central flow condenser

May 2016

Q. 4. b) What is the necessity of condenser in a steam power plant? [4 marks]

December 2016

Q. 1. b) During trial on steam condenser, following observations were recorded:

            Condenser vacuum = 680 mm of Hg;

            Barometer reading = 764 mm of Hg;

            Mean condenser temp. = 36.2° C;

            Hot well temperature = 28°C;

            Condensate formed per hour = 1780 kg;

            Circulating cooling water inlet temp. = 20° C;

            Circulating cooling water outlet temp. = 32° C;

            Quantity of cooling water = 1250 kg/min.

            Determine:

            i) Condenser vacuum corrected to standard barometer

            ii) Vacuum efficiency

            iii) Undercooling of condensate

            iv) Condenser efficiency. [6 marks]

March 2017

Q. 3. b) The following readings were taken during a test on a surface condenser:

            Mean condenser temperature = 35°C,

            Hot well temperature = 30°C,

            Condenser vacuum = 69 cm of Hg,

            Barometer reading = 76 cm of Hg,

            Condensate collected 16 kg/min.

            Cooling water enters at 20° C and leaves at 32.5° C, flow rate being 37,500 kg/hr.

            Calculate:

            a) Mass of air present per cubic meter of condenser

            b) Quality of steam at condenser inlet

            c) Vacuum efficiency

            d) Condenser efficiency. [6 marks]

(OR)

Q. 4. b) Exhaust steam having quality of 0.9 enters a surface condenser at an absolute pressure of 0.13 bar and comes out as water at 45°C. Estimate the quantity of circulating water and the condenser efficiency. [5 marks]

May 2017

Q. 2. b) Define: Condenser Efficiency & Vacuum Efficiency. [6 marks]

December 2017

None

March 2018

None

May 2018

Q. 3. b) Define: Condenser Efficiency & Vacuum Efficiency. [6 marks]

December 2018

None