Sensible Heat Ratio - SHR

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The Sensible Heat Ratio - SHR - express the ratio between the sensible heat load and the total heat load and can be expressed as:

SHR = q_s / q_t         (1)

where

SHR = sensible heat ratio (ratio of sensible heat load to total heat load)

q_s = sensible heat (kW, Btu/hr)

q_t = total heat - sensible heat and latent heat (kW, Btu/hr)

(1) can be modified to:

SHR = c_p (t_o - t_i) / (h_o - h_i)         (2)

where

c_p = specific heat capacity of air (kJ/kg^oC, Btu/lb^oF)

t_o = outlet temperature (^oC, ^oF)

t_i = inlet temperature (^oC, ^oF)

h_o = outlet enthalpy (kJ/kg, Btu/lb)

h_i = inlet enthalpy (kJ/kg, Btu/lb)

General Design Values

• Auditoriums, Theaters - SHR : 0.65 - 0.75
• Apartments - SHR : 0.80 - 0.95
• Banks, Court Houses, Municipal Buildings - SHR : 0.75 - 0.90
• Churches - SHR : 0.65 - 0.75
• Dining Halls - SHR : 0.65 - 0.80
• Computer Rooms - SHR : 0.80 - 0.95
• Cocktail Lounges, Bars, Taverns, Clubhouses, Nightclubs - SHR : 0.65 - 0.80
• Jails - SHR : 0.80 - 0.95
• Hospital Patient Rooms, Nursing Home, Patient Rooms - SHR : 0.75 - 0.85
• Kitchens - SHR : 0.60 - 0.70
• Libraries, Museums - SHR : 0.80 - 0.90
• Malls, Shopping Centers - SHR : 0.65 - 0.85
• Medical/Dental Centers, Clinics and Offices - SHR : 0.75 - 0.85
• Motel and Hotel Public Areas - SHR : 0.75 - 0.90
• Motel and Hotel Guest Rooms - SHR : 0.80 - 0.95
• Police Stations, Fire Stations, Post Offices - SHR : 0.75 - 0.90
• Precision Manufacturing - SHR : 0.80 - 0.95
• Restaurants - SHR : 0.65 - 0.80
• Residences - SHR : 0.80 - 0.95
• Retail, Department Stores - SHR : 0.65 - 0.90
• Other Shops - SHR : 0.65 - 0.90
• School Classrooms - SHR : 0.65 - 0.80
• Supermarkets - SHR : 0.65 - 0.85

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Related Topics

• Air Conditioning - Air Conditioning systems - heating, cooling and dehumidification of indoor air for thermal comfort
• Air Psychrometrics - The study of moist and humid air - air condition - psychrometric charts, Mollier diagrams, air temperature, absolute and relative humidity, moisture content and more .

Related Documents

• Cooling Loads - Latent and Sensible Heat - Latent and sensible cooling loads to consider in design of HVAC systems
• Cooling and Heating Equations - Latent and sensible cooling and heating equations - in imperial units
• Great Sensible Heat Factor - GSHF - The Great Sensible Heat Factor is the ratio between the sensible and total heat for a cooling coil
• Room Sensible Heat Factor - RSHF - The Room Sensible Heat Factor - RSHF - is defined as the sensible heat load in the room divided by the total heat load in room
• Sensible Heat Flow - Sensible heat is dry heat causing change in temperature but not in the moisture content