Steam Radiators and Convectors - Heating Capacities
Calculate the heat capacity of steam-heated radiators and convectors based on condensate rate, latent heat of steam, and temperature correction coefficients.
Steam Heated Radiator
The heat capacity of a steam radiator is calculated as:
Hr = qs × hs × λr
Where:
- Hr = heat capacity of radiator (kW, Btu/h)
- qs = condensate rate (kg/h, lb/h)
- hs = latent heat steam (2675 kJ/kg, 970 Btu/lb)
- λr = radiator temperature correction coefficient
The radiator correction coefficient is:
λr = ((215 - 70) / (ts - tr))^1.3
Where:
- ts = average steam temperature (°F)
- tr = room temperature (°F)
Steam Heated Convector
The heat capacity of a steam convector is calculated as:
Hc = qs × hs × λc
Where:
- Hc = heat capacity of convector (kW, Btu/h)
- qs = condensate rate (kg/h, lb/h)
- hs = latent heat steam (2675 kJ/kg, 970 Btu/lb)
- λc = convector temperature correction coefficient
The convector correction coefficient is:
λc = ((215 - 65) / (ts - ti))^1.5
Where:
- ts = steam temperature (°F)
- ti = inlet temperature (°F)