Calculate total automotive cabin thermal load from solar gain, occupants, electronics, and ambient conditions.
Input Parameters
Results
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Solar Load
BTU/hr
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Occupant Load
BTU/hr
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Conduction Load
BTU/hr
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Total Cabin Load
BTU/hr
Note: Solar gain through glass is the largest cabin heat source (50-60%). Tinted glass and sunshades can reduce solar load by 30-50%. Parked car cabin can exceed 150°F.
Reference
Solar Load = Glass Area × Solar × SHGC (0.65)
Occupant Load = N × 400 BTU/hr
Conduction = U × Shell Area × ΔT / 10
U: Poor=12, Average=8, Good=5
Total = Solar + Occupant + Conduction