# Define TECs
TEC_12 = {
    'v': 12,     # 12 volt version, TEC1-12710
    'kp': 9.6,   # pelter coef
}

TEC_5 = {
    'v': 5,     # 5 volt version
    'kp': 9.6,  # pelter coef
}

# calc power
def power(Q, tec):
    v = tec['v']
    k = tec['kp']
    return (v*Q)/k

print "Power supply for bottom TEC: ", power(90, TEC_12), '  Watts'
print "Power supply for top TEC      ", power(90, TEC_5), 'Watts'