Further on our studies in the health and building sciences, we have reviewed Song’s paper,"Effect of floor surface temperature on blood flow and skin temperature in the foot”, demonstrating again that building and health sciences are inclusive elements.
Abstract: “A total of 16 healthy college students participated as subjects to elucidate the hypothesis that blood flow and skin temperature in foot are affected by the floor surface temperature. The floor surface temperature was controlled by varying the temperature of water (tw) flowing underneath the floor, and it ranged from tw 15°C (59°F) to 40°C (104°F) at 5°C (9°F) intervals. The blood flow rate was measured in the dorsal right toe, and skin temperatures were measured for 60 min at 8 points: the neck, right scapular, left hand, right shin, left bottom of the toe, right instep, left finger, and rectum. The blood flow rate in the foot tissue was increased until the foot skin temperature warmed up to 34°C (93°F) (P = 0.000). The final skin temperatures on the bottom of the toe were 19.4°C ± 2.44°C for tw 15°C , 22.4°C ± 2.45 °C for tw 20°C, 24.8°C ± 2.80°C for tw 25°C, 27.7°C ± 2.13°C for tw 30°C, 30.6°C ± 2.06°C for tw 35°C, 33.2 ± 1.45°C for tw 40°C, 34.2°C ± 1.55°C for tw 45°C, and 35.2°C ± 1.65°C for tw 50°C. Considering blood flow and comfort, the partial floor heating system is suggested and the recommended floor surface temperature range is 27°C (80°F) to 33°C (91°F).”
*(selected dual units inserted by RB)
citation:Song, G.S., Effect of floor surface temperature on blood flow and skin temperature in the foot, Indoor Air 2008; 18: 511–520
RBc: Since the surface temperature influences the heat flux, the operating range has to be taken into consideration of the space load and if necessary the conditioned area will be adjusted down to drive the flux up to provide the desired surface temperature. This is a topic we address in our intermediate to advanced courses. If you're interested in hosting a program drop us a line...email@example.com
Suggested reading: Floor surface temperatures
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