What is the efficiency of a typical steam power plant?
Answer & step-by-step solution
A conventional steam power plant typically converts roughly 30–40% of fuel heat into electrical output, depending on steam conditions, reheat/regeneration and plant technology. The rest is rejected mainly in the condenser and stack.
Concept & Reasoning
The Rankine cycle is constrained by thermodynamic temperature limits and practical component losses. Modern supercritical units can exceed older subcritical values, but the exam's typical range 30–40% is the appropriate conventional figure among the options.
How to Solve It in the Exam
Conventional steam thermal plant → roughly one-third efficiency.
Important Exam Point
Do not confuse boiler efficiency with overall station efficiency.
Quick Trick
Conventional steam thermal plant → roughly one-third efficiency.
Common Mistake
Choosing 70–80%, which is far beyond typical standalone steam-cycle electrical efficiency.
एक सामान्य भाप विद्युत संयंत्र की दक्षता कितनी होती है?
उत्तर और चरणबद्ध हल
B — 30-40%। पारंपरिक भाप संयंत्र भाप परिस्थितियों, रीहीट/रीजनरेशन और तकनीक के अनुसार ईंधन ऊष्मा का लगभग 30–40% बिजली में बदलता है; शेष मुख्यतः कंडेंसर और चिमनी में निकल जाता है।
विस्तृत हल (मूल भाषा में)
Concept & Reasoning
The Rankine cycle is constrained by thermodynamic temperature limits and practical component losses. Modern supercritical units can exceed older subcritical values, but the exam's typical range 30–40% is the appropriate conventional figure among the options.
How to Solve It in the Exam
Conventional steam thermal plant → roughly one-third efficiency.
Important Exam Point
Do not confuse boiler efficiency with overall station efficiency.
Quick Trick
Conventional steam thermal plant → roughly one-third efficiency.
Common Mistake
Choosing 70–80%, which is far beyond typical standalone steam-cycle electrical efficiency.
એક સામાન્ય વરાળ વીજ મથકની કાર્યક્ષમતા કેટલી હોય છે?
જવાબ અને પગલાવાર ઉકેલ
B — 30-40%. પરંપરાગત વરાળ મથક વરાળની સ્થિતિ, રીહીટ/રીજનરેશન અને ટેકનોલોજી મુજબ ઇંધણ ઉષ્માનો આશરે 30–40% વીજળીમાં ફેરવે છે; બાકીની મુખ્યત્વે કન્ડેન્સર અને ચીમનીમાં નીકળી જાય છે.
વિગતવાર ઉકેલ (મૂળ ભાષામાં)
Concept & Reasoning
The Rankine cycle is constrained by thermodynamic temperature limits and practical component losses. Modern supercritical units can exceed older subcritical values, but the exam's typical range 30–40% is the appropriate conventional figure among the options.
How to Solve It in the Exam
Conventional steam thermal plant → roughly one-third efficiency.
Important Exam Point
Do not confuse boiler efficiency with overall station efficiency.
Quick Trick
Conventional steam thermal plant → roughly one-third efficiency.
Common Mistake
Choosing 70–80%, which is far beyond typical standalone steam-cycle electrical efficiency.
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