1.3 During the trial of a single acting oil engine, cylinder diameter is 20 cm, stroke 28 cm, working on two stroke cycle and firing every cycle, the following observations were made: Duration of trial :1 hour :4.22 kg :44670 kJ/kg Total fuel used Calorific value Proportion of hydrogen in fuel : 15% Total number of revolutions :21000 Mean effective pressure : 2.74 bar Net brake load applied to a drum of 100 cm diameter : 600 N Total mass of cooling water circulated : 495 kg Total mass of cooling water 13°C, outlet 38°C : inlet Air used : 135 kg : 20°C Temperature of air in test room Temperature of exhaust gases 370°C Assume Cp, gases = 1.005 kJ/kg K, Cp, steam at atmospheric pressure = 2.093 kJ/kg K Calculate thermal efficiency and draw up the heat

Elements Of Electromagnetics
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1.3 During the trial of a single acting oil engine,
cylinder diameter is 20 cm, stroke 28 cm, working on
two stroke cycle and firing every cycle, the following
observations were made:
Duration of trial
:1 hour
:4.22 kg
:44670 kJ/kg
Total fuel used
Calorific value
Proportion of hydrogen in fuel
: 15%
Total number of revolutions
:21000
Mean effective pressure
: 2.74 bar
Net brake load applied to a drum of 100 cm diameter
: 600 N
Total mass of cooling water circulated
: 495
kg
Total mass of cooling water
13°C, outlet 38°C
: inlet
Air used
: 135 kg
: 20°C
Temperature of air in test room
Temperature of exhaust gases
370°C
Assume Cp, gases = 1.005 kJ/kg K, Cp, steam at
atmospheric pressure = 2.093 kJ/kg K
Calculate thermal efficiency and draw up the heat
balance.
Transcribed Image Text:1.3 During the trial of a single acting oil engine, cylinder diameter is 20 cm, stroke 28 cm, working on two stroke cycle and firing every cycle, the following observations were made: Duration of trial :1 hour :4.22 kg :44670 kJ/kg Total fuel used Calorific value Proportion of hydrogen in fuel : 15% Total number of revolutions :21000 Mean effective pressure : 2.74 bar Net brake load applied to a drum of 100 cm diameter : 600 N Total mass of cooling water circulated : 495 kg Total mass of cooling water 13°C, outlet 38°C : inlet Air used : 135 kg : 20°C Temperature of air in test room Temperature of exhaust gases 370°C Assume Cp, gases = 1.005 kJ/kg K, Cp, steam at atmospheric pressure = 2.093 kJ/kg K Calculate thermal efficiency and draw up the heat balance.
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