A. B. C.

WEST WINDOW EXTERIOR WALL 40F 52F SOUTH WINDOW SEAT SEAT TABLE 35. Following is a sketch of a floor plan of a solarium (a 'sun' room) in a senior rehabilitation center. The proposed seating configuration is shown to the right. It is a space in a 1930s-vintage building, so windows are steel-framed with single glass. Temperatures of the walls, interior partitions, windows and door surfaces are shown under extreme winter outdoor conditions (~3F outdoor temperature). Angular exposures of these surfaces to the seated person under consideration are provided in italics. SEAT 40F- TABLE -72F 42 120 SEAT INTERIOR PARTITION Answer the questions below. -seated person 198 -72F INTERIOR DOOR SEAT INTERIOR PARTITION a. approximate the mean radiant temperature of the seated person. Neglect the effects of ceiling and floor surfaces. [8 pts) WEST WINDOW EXTERIOR WALL 58F 64F SOUTH WINDOW SEAT SEAT TADLE SEAT b. A sustainable retrofit project on this building is under consideration by your firm. Windows will be replaced with low-e double glass, which will change the interior surface temperature of window areas to 58F during extreme winter outdoor conditions. The exterior wall will be further insulated, which will change its interior surface temperature to 64F during extreme winter outdoor conditions. Approximate the mean radiant temperature of the seated person with these modifications. Neglect the effects of the ceiling and floor surfaces. [8 pts] 58F 1 TABLE -72F I 42 I I SEAT 120 INTERIOR PARTITION -seated person -72F 1989 INTERIOR DOOR SEAT INTERIOR PARTITION INTERIOR PARTITION c. An ideal mean radiant temperature is within 4F of the desired temperature sensation of the occupant (typically 70F). Will the sustainable retrofit project improvements raise the MRT into an acceptable range of thermal comfort? Answer "yes" or "no." [4 pts] WEST WINDOW EXTERIOR WALL 40F 52F SOUTH WINDOW SEAT SEAT TABLE 35. Following is a sketch of a floor plan of a solarium (a 'sun' room) in a senior rehabilitation center. The proposed seating configuration is shown to the right. It is a space in a 1930s-vintage building, so windows are steel-framed with single glass. Temperatures of the walls, interior partitions, windows and door surfaces are shown under extreme winter outdoor conditions (~3F outdoor temperature). Angular exposures of these surfaces to the seated person under consideration are provided in italics. SEAT 40F- TABLE -72F 42 120 SEAT INTERIOR PARTITION Answer the questions below. -seated person 198 -72F INTERIOR DOOR SEAT INTERIOR PARTITION a. approximate the mean radiant temperature of the seated person. Neglect the effects of ceiling and floor surfaces. [8 pts) WEST WINDOW EXTERIOR WALL 58F 64F SOUTH WINDOW SEAT SEAT TADLE SEAT b. A sustainable retrofit project on this building is under consideration by your firm. Windows will be replaced with low-e double glass, which will change the interior surface temperature of window areas to 58F during extreme winter outdoor conditions. The exterior wall will be further insulated, which will change its interior surface temperature to 64F during extreme winter outdoor conditions. Approximate the mean radiant temperature of the seated person with these modifications. Neglect the effects of the ceiling and floor surfaces. [8 pts] 58F 1 TABLE -72F I 42 I I SEAT 120 INTERIOR PARTITION -seated person -72F 1989 INTERIOR DOOR SEAT INTERIOR PARTITION INTERIOR PARTITION c. An ideal mean radiant temperature is within 4F of the desired temperature sensation of the occupant (typically 70F). Will the sustainable retrofit project improvements raise the MRT into an acceptable range of thermal comfort? Answer "yes" or "no." [4 pts]