Area per Person
Normal area per person in some common buildings - the values can be used to calculate indoor climate loads...
People and Heat Gain
Approximate Heat Gain from Occupants in Air Conditioned Spaces - in Watts
The table below can be used...
Persons and Metabolic Heat Gain
Approximate metabolic heat gain from occupants in air conditioned spaces at different degr...
Met - Metabolic Rate
The Met is often used as a measuring unit of human heat production
The metabolic rate, or human heat ...
Clo - Clothing and Thermal Insulation
Clo is used to measure the thermal insulation of clothes
The insulation of clothes a...
Insulation
                          Clothing
                                                                     Clo    ...
Lights - Installed Power
Installed light power in some common types of buildings and rooms
The table below can be used as ...
Electrical Equipment and Power Consumption
Power consumption and running time for commonly used electrical equipment
The t...
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I N T E R N A L C O O L I N G L O A D C A L C U L A T I O N

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I N T E R N A L C O O L I N G L O A D C A L C U L A T I O N

  1. 1. Area per Person Normal area per person in some common buildings - the values can be used to calculate indoor climate loads Type of Building/Room SqM / Person Type of Building/Room SqM / Person Apartments 25.0 Municipal Buildings 10.0 Library 5.0 Museums 6.0 Concert hall 0.6 Nightclubs 3.0 Banks 10.0 Nursing Home Patient Rooms 11.0 Cafeterias 3.0 Offices Single office 10.0 Clubhouses 3.0 Meeting room 1.5 Computer Rooms 11.0 Police Stations 28.0 Court Houses 10.0 Post Offices 28.0 Department Stores 4.0 Precision Manufacturing 20.0 Drug Store 3.0 Residential 35.0 Hotels Rooms 5.0 Restaurant With service 1.5 Lobby 0.6 Without service 1.0 Assembly room 1.5 Retail Stores 4.0 Hospitals General Areas 10.0 Schools Lecture rooms 0.6 Patient Rooms 11.0 Class rooms 2.0 Kindergarten 1.5 Corridors 2.0 Kitchens 10.0 Laboratory 3.0 Libraries 6.0 Shops Detail 2.0 Luncheonettes 3.0 Supermarkets 2.0 Lunch Rooms 3.0 Sports Gymnasium 1.5 Motels Public Spaces 7.0 Swimming pools 4.0 Guest Rooms, 10.0 Supermarkets 7.0 Dormitories 14.0 Taverns 3.0 14.0 Town Halls 10.0
  2. 2. People and Heat Gain Approximate Heat Gain from Occupants in Air Conditioned Spaces - in Watts The table below can be used to estimate the sensible and latent heat from people. The values can be used to calculate the heat load handled by the air condition system. Sensible Heat Latent Heat Total Heat Typical Application (W) (W) (W) Theater-Matinee 59 38 97 Theater-Evening 62 40 102 Offices, Hotels, Apartments 63 54 117 Retail & Department Stores 65 68 133 Drug Store 65 82 147 Bank 65 82 147 Restaurant 70 91 161 Factory 70 150 220 Dance Hall 79 170 249 Factory 97 196 293 Bowling Alley 150 275 425 Factory 150 275 425
  3. 3. Persons and Metabolic Heat Gain Approximate metabolic heat gain from occupants in air conditioned spaces at different degrees of activities - in watts The table below can be used to estimate the sensible and latent heat from people. The values can be used to calculate the heat load handled by the air condition system. Typical Application Average Room Dry Bulb Temperature (oC) Metabolic 28 27 26 24 22 20 Degree of Activity rate - Sens. Lat. Sens. Lat. Sens. Lat. Sens. Lat. Sens. Lat. Sens. Lat. male adult Seated at rest Cinema, theatre, school 100 50 50 55 45 60 40 67 33 72 28 79 21 Seated, very light work Computer working 120 50 70 55 65 60 60 70 50 478 42 84 36 Office work Hotel reception, 130 50 80 56 74 60 70 70 60 78 52 86 44 Standing, walking slowly Laboratory work 130 50 80 56 74 60 70 70 60 78 52 86 44 Walking, seated 150 53 97 58 92 64 86 76 74 84 66 90 60 Moderate work Servant, hair dresser 160 55 105 60 100 68 92 80 80 90 70 98 62 Light bench work Mechanical production 220 55 165 52 158 70 150 85 135 100 120 115 105 Moderate Dancing Party 250 62 188 70 180 78 172 94 156 110 140 125 125 Fast walking Mountain walking 300 80 220 88 212 96 204 110 190 130 170 145 155 Heavy work Athletics 430 132 298 138 292 144 286 154 276 170 260 188 242
  4. 4. Met - Metabolic Rate The Met is often used as a measuring unit of human heat production The metabolic rate, or human heat production, is often measured in the unit "Met". The metabolic rate of a relaxed seated person is one (1) Met, where 1 Met = 58 W/m2 The mean surface area, the Du-Bois area, of the human body is approximately 1.8 m2. The total metabolic heat for a mean body can be calculated by multiplying with the area. The total heat from a relaxed seated person with mean surface area would be 58 W/m2 x 1.8 m2 = 104 W Metabolic rates for some common activities: Activity W/m2 Met Reclining 46 0.8 Seated relaxed 58 1 Standing relaxed 70 1.2 Sedentary activity (office, dwelling, school, laboratory) 70 1.2 Car driving 80 1.4 Standing, light activity (shopping, laboratory, light industry) 93 1.6 Domestic work -shaving, washing and dressing 100 1.7 Standing, medium activity (shop assistant, 116 2 Building industry - Brick laying (Block of 15.3 kg) 125 2.2 Domestic work - raking leaves on the lawn 170 2.9 Domestic work - washing by hand and ironing (120-220 W) 170 2.9 pneumatic hammer 170 2.9 Walking on the level, 5 km/h 200 3.4 one-man power saw 200 3.4 Calisthenics 261 4.5 Bicycling 290 5 Softball 290 5 Gymnastics 319 5.5 Basketball 319 5.5 Sports - Ice skating, 18 km/h 360 6.2 Skiing on level, good snow, 9 km/h 405 7 Backpacking, Skating ice or roller, Tennis 405 7 Handball, Hockey, Racquetball, Cross County Skiing, Soccer 464 8 Running 12 min/mile 500 8.5 Forestry - working with an axe (weight 2 kg. 33 blows/min.) 500 8.5 Sports - Running in 15 km/h 550 9.5
  5. 5. Clo - Clothing and Thermal Insulation Clo is used to measure the thermal insulation of clothes The insulation of clothes are often measured with the unit "Clo", where 1 Clo = 0.155 m²K/W Zero (0) Clo corresponds to a naked person One (1) Clo corresponds to a person wearing a typical business suit Insulation Clothing Clo m²K/W Underwear - pants Pantyhose 0.02 0.003 Panties 0.03 0.005 Briefs 0.04 0.006 Pants 1/2 long legs made of wool 0.06 0.009 Pants long legs 0.1 0.016 Underwear - shirts Bra 0.01 0.002 Shirt sleeveless 0.06 0.009 T-shirt 0.09 0.014 Shirt with long sleeves 0.12 0.019 Half-slip in nylon 0.14 0.022 Short sleeve 0.09 0.029 Light shirt with long sleeves 0.2 0.031 Flannel shirt with long sleeves 0.3 0.047 Trousers Shorts 0.06 0.009 Light trousers 0.2 0.031 Normal trousers 0.25 0.039 Overalls 0.28 0.043 Work 0.5 0.078 Fiber-pelt 1.13 0.175 Thin sweater 0.2 0.031 Thick sweater 0.35 0.054 Jacket Vest 0.13 0.02 Light summer jacket 0.25 0.039 Jacket 0.35 0.054 Down jacket 0.55 0.085 Parka 0.7 0.109 Sundries Socks 0.02 0.003 Thin soled shoes 0.02 0.003 Quilted fleece slippers 0.03 0.005 Thick soled shoes 0.04 0.006 Thick ankle socks 0.05 0.008
  6. 6. Insulation Clothing Clo m²K/W Boots 0.05 0.008 Thick long socks 0.1 0.016 Skirts, dresses Light skirt 15 cm. above knee 0.01 0.016 Light skirt 15 cm. below knee 0.18 0.028 Heavy skirt knee-length 0.25 0.039 Light dress sleeveless 0.25 0.039 Winter dress long sleeves 0.4 0.062 Sleepwear Under shorts 0.1 0.016 Short gown thin strap 0.15 0.023 Long gown long sleeve 0.3 0.047 Hospital gown 0.31 0.048 long pajamas with long sleeve 0.5 0.078 Body sleep with feet 0.72 0.112 Robes Long sleeve, wrap, short 0.41 0.064 Long sleeve, wrap, long 0.53 0.082 An overall insulation or Clo value can be calculated by simply taking the Clo value for each individual garment worn by the person, adding them together. The mean surface area of the human body is approximately 1.7 m2.
  7. 7. Lights - Installed Power Installed light power in some common types of buildings and rooms The table below can be used as a guide to installed light power (Watts/SqM) in some common types of buildings and rooms. Light Power Light Power Type of Building/Room Type of Building/Room (Watts/SqM) (Watts/SqM) Apartments 25 Lunch Rooms 20 Banks 35 Malls 20 Bars 20 Medical Centers 20 Cafeterias 20 Motels Public Areas 25 Churches 20 Motels Guest Rooms 20 Clubhouses 20 Municipal Buildings 35 Cocktail Lounges 20 Museums 20 Computer Rooms 35 Nightclubs 20 Court Houses 35 Nursing Home Patient Rooms 25 Dental Centers 20 Police Stations 25 Dining Halls 20 Post Offices 25 Drug Store 20 Precision Manufacturing 25 Fire Stations 25 Residential 25 Hospitals, General Areas 20 Retail Stores 45 Hotels Public Spaces 25 Restaurants 25 Kindergarten 20 School Classrooms 45 Kitchens 25 Shops 20 Jail 20 Supermarkets 20 Libraries 20 Taverns 20 Luncheonettes 20 Town Halls 35
  8. 8. Electrical Equipment and Power Consumption Power consumption and running time for commonly used electrical equipment The table below can be used as an indication of the running time and power consumption of some commonly used electrical equipment. Power Running time Energy consumption Equipment (W) (h) (kWh) Daily Weekly Quarter Quarter Aquarium 130 12 1080 140 Electric shaver 20 0.15 15 <1 Toaster 850 0.15 15 13 Drill 500 10 5 Freezer 85 16 1450 125 Handmixer 150 0.1 7 <1 Coffee machine 800 0.2 23 18 Hair dryer 600 1 13 8 Refrigerator 75 9 800 60 Lamp 60 5 450 27 Microwave oven 1300 0.1 15 20 Dish washing machine 100 Iron 1000 0.5 7 7 Television 100 3 270 27

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