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Eficienta energetica a corpului uman


Electricity
(@electricity)
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Data:: acum 6 luni
Postari: 19
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Ca tot am discutat despre mitocoindrii ( uzinele electrice ale corpului uman ) intr-un alt post, am zarit  un articol despre eficienta energetica corpului uman 

Putere absorbita in stare de repaus a corpului uman 85 W   

Mentiuni : Studiul a fost facut pe un barbat cu o greutate de 76 kg

Organ Power consumed at rest (W) Oxygen consumption (mL/min)  
Liver & spleen 23 67  
Brain 16 47  
Skeletal muscle 15 45  
Kidney 9 26  
Heart 6 17  
Other 16 48  
Totals 85 W 250 mL/min

Putere " absorbita " de diverse activitati exprimate in W : 

Activity Energy consumption in watts Oxygen consumption in liters O2/min
Sleeping 83 0.24
Sitting at rest 120 0.34
Standing relaxed 125 0.36
Sitting in class 210 0.60
Walking (5 km/h) 280 0.80
Cycling (13–18 km/h) 400 1.14
Shivering 425 1.21
Playing tennis 440 1.26
Swimming breaststroke 475 1.36
Ice skating (14.5 km/h) 545 1.56
Climbing stairs (116/min) 685 1.96
Cycling (21 km/h) 700 2.00
Running cross-country 740 2.12
Playing basketball 800 2.28
Cycling, professional racer 1855 5.30
Sprinting 2415 6.90

Si acum concluzia legata de eficienta : 

System Input Energy Form Desired Output Form Max Efficiency
Human Body Chemical Potential Mechanical 25 %
Automobile Engine Chemical Potential Mechanical 25 %
Coal/Oil/Gas Fired Stream Turbine Power Plants Chemical Potential Electrical 47%
Combined Cycle Gas  Power Plants Chemical Potential Electrical 58 %
Biomass/Biogas Kinetic Electrical 40%
Nuclear Kinetic Electrical 36%
Solar-Photovoltaic Power Plant Sunlight (Electromagnetic) Electrical 15%
Solar-Thermal Power Plant Sunlight (Electromagnetic) Electrical 23%
Hydroelectric and Tidal Power Plants Gravitational Potential Electrical 90%+

 

 

Acest subiect a fost modificat acum 5 luni de Electricity

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