AREN 3050 Environmental Systems for Buildings I FALL 2005 Project #1: Thermal Comfort – Due Friday, September 16, 9:00 am The objectives of this project are to assess the thermal comfort of indoor environments and develop design recommendations for acceptable indoor air temperature to ensure occupant comfort. You will evaluate two rooms. One room is specified below. It is a relatively small office with two exterior walls. You will select a second room on the University of Colorado campus using the criteria identified below. You may work by yourself or in teams of two for this project. Small Office Analysis One room for analysis is a small office. The office measures 16 ft. by 10 ft. with an 8 ft ceiling and is on the corner of a building. There is a window on each of the two exterior walls. The window on the short wall measures 4 ft. high by 6 ft. wide and the window on the long wall measures 4 ft. high by 8 ft. wide. Each window is centered horizontally on each wall, and is 3 ft. off the floor. For this small office, consider a person in two alternative locations in the room. Location A is 4 ft. from each exterior wall. Location B is 4 ft from each interior wall. You are to analyze the comfort in the room and make recommendations for the range of comfortable indoor air temperatures. You will consider the impact of clothing, activity level, air velocity, indoor humidity, and mean radiant temperature (MRT) on the range of air temperature required to ensure that less than 10% of the people will be dissatisfied with the space. To guide this evaluation, I have developed the following eight scenarios under which the comfort should be evaluated.  Heating Scenario 1 The outdoor temperature is very cold. The inside surfaces of the exterior walls are 5°F colder than the indoor air temperature and the window surfaces are 20°F colder than the indoor air temperature. The air velocity in the room is 30 fpm and the indoor relative humidity is 30%. The person in the room is a man wearing wool pants, t-shirt, button-down long-sleeve shirt, light long-sleeve sweater, briefs, socks, and oxford shoes. He is standing, pacing about, while speaking on the phone. (Assume he is walking in a very small circle around the designated location.)  Heating Scenario 2 The outdoor temperature is very cold. The inside surfaces of the exterior walls are 5°F colder than the indoor air temperature and the window surfaces are 20°F colder than the indoor air temperature. The air velocity in the room is 30 fpm and the indoor relative humidity is 30%. The person in the room is a man wearing lightweight pants, button-down long-sleeve shirt, briefs, socks, and oxford shoes. He is sitting quietly reading.  Heating Scenario 3 The outdoor temperature is relatively cool. The inside surfaces of the exterior walls are 2°F colder than the indoor air temperature and the window surfaces are 8°F colder than the indoor air temperature. The air velocity in the room is 30 fpm and the indoor relative humidity is 30%. The person in the room is a man wearing lightweight pants, t-shirt, button-down long-sleeve shirt, light long-sleeve sweater, briefs, socks, and oxford shoes. He is standing and filing.AREN 3050 Environmental Systems for Buildings I FALL 2005  Heating Scenario 4 The outdoor temperature is relatively cool. The inside surfaces of the exterior walls are 2°F colder than the indoor air temperature and the window surfaces are 8°F colder than the indoor air temperature. The air velocity in the room is 80 fpm and the indoor relative humidity is 30%. The person in the room is a man wearing lightweight pants, short-sleeve shirt, briefs, socks, and oxford shoes. He is sitting quietly reading.  Cooling Scenario 1 The outdoor temperature is hot. The inside surfaces of the exterior walls are 4°F warmer than the indoor air temperature and the window surfaces are 8°F warmer than the indoor air temperature. The air velocity in the room is 30 fpm and the indoor relative humidity is 50%. The person in the room is a man wearing lightweight pants, t-shirt, button-down long-sleeve shirt, briefs, socks, and oxford shoes. He is standing, pacing about, while speaking on the phone. (Assume he is walking in a very small circle around the designated location.)  Cooling Scenario 2 The outdoor temperature is hot. The inside surfaces of the exterior walls are 4°F warmer than the indoor air temperature and the window surfaces are 8°F warmer than the indoor air temperature. The air velocity in the room is 80 fpm and the indoor relative humidity is 30%. The person in the room is a man wearing walking shorts, knit short-sleeve shirt, briefs, and sandals. He is sitting quietly reading.  Cooling Scenario 3 The outdoor temperature is warm. The inside surfaces of the exterior walls are 2°F warmer than the indoor air temperature and the window surfaces are 4°F warmer than the indoor air temperature. The air velocity in the room is 30 fpm and the indoor relative humidity is 60%. The person in the room is a man wearing lightweight pants, short-sleeve shirt, briefs, socks, and oxford shoes. He is sitting quietly reading.  Cooling Scenario 4 The outdoor temperature is warm. The inside surfaces of the exterior walls are 2°F warmer than the indoor air temperature and the window surfaces are 4°F warmer than the indoor air temperature. The air velocity in the room is 30 fpm and the indoor relative humidity is 30%. The person in the room is a man wearing lightweight pants, short-sleeve shirt, briefs, socks, and oxford shoes. He is sitting quietly reading. Large Room Analysis You must identify a second space for analysis and, like the small office space, develop a analogous set of recommendations. The space must be large and have a significant amount of exterior window and wall area. Some good examples of appropriate spaces are the lobby of the Engineering Center, the UMC dining areas, the Gamow Tower lounge, an ENVD third-floor studio space, or the Recreation Center. If you have any questions about the suitability of a room, feel free to email me for confirmation. To perform the analysis, you must identify at least 3 locations within the space and at least 6 scenarios for comfort evaluation. As with the small office space, you should consider the impact of clothing, activity level, air velocity, indoor humidity, and mean radiant temperature (MRT) on the range of air temperature required to ensure that less than