Room Sensible Heat Factor - RSHF

The Room Sensible Heat Factor - RSHF - expresses the ratio between sensible heat load and total heat load in a room. It can be expressed as:

RSHF = Q_sr / Q_tr                           (1)

where

RSHF = room sensible heat factor

Q_sr = sensible heat load in room (kW, Btu/hr)

Q_tr = total heat load in room (kW, Btu/hr)

(1) can be modified to:

RSHF = c_p (t_r - t_i) / (h_r - h_i)                                 (2)

where

c_p = specific heat air (kJ/kg.^oC)

t_r = room temperature (^oC)

t_i = inlet temperature (^oC)

h_r = room enthalpy (kJ/kg)

h_i = inlet enthalpy (kJ/kg)

Example - Room Sensible Heat Factor - RSHF

The sensible heat generated within a room is 4 kW. The latent heat generated is 1.4 kW.

The Room Sensible Heat Factor can be calculated as:

RSHF = (4 kW) / ((4 kW) + (1.4 kW))

= 0.75