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Published in Pablo La Roche, Carbon-Neutral Architectural Design, 2017
The effect of this heating by solar radiation on external surfaces is measured by the sol–air temperature, which combines the heating effect of the incident radiation falling upon a building with the effect of the hot air in contact with this surface. The sol–air temperature is the new surface temperature used to calculate heat flow by conduction, accounting for the thermal effect of the incident solar radiation. () TSA=To+a×Itho=LWR
Passive design principles
Published in David Thorpe, Passive Solar Architecture Pocket Reference, 2018
‘Sol-air’ temperature is the temperature of air which will result in the same heat flux into a building taking into account the effects of incident radiation. It is defined as: Tsa=To+(I⋅a)ho
Static Design Concept for a Light-Structured Building for Cold Climatic Conditions
Published in Neha Gupta, Gopal Nath Tiwari, Photovoltaic Thermal Passive House System, 2022
Sol-air temperature (Tsa) combines the effect of solar radiation, ambient air temperature and long-wave radiant heat exchange with the environment. Physically sol-air temperature is the temperature of the surroundings, which produces a similar heating effect as the incident radiation in conjunction with the actual external air temperature [1].
A study of solar heat gain variation in building applied photovoltaic buildings and its impact on environment and indoor air quality
Published in Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 2022
Selvakumar Pandiaraj, Abubakkar Abdul Jaffar, Suresh Muthusamy, Hitesh Panchal, Santhiya Pandiyan
Sol-air temperature (Tsol) is a variable used to calculate cooling load of a building and determine the total heat gain through exterior surfaces. The sol air temperature is used because the solar radiative flux and infrared exchanges from the sky are also included in the variable. Figure 11a and Figure 11b shows variation of sol-air temperature and air temperature inside the room, with time. From the calculated values it is seen that the sol air temperature reaches higher values for open roofs as compared to the ones covered by photovoltaics. Peak value of 86.96°C was reached on 1200 hours, February. The values are somewhat similar for both the months. Higher sol air temperature contributes to higher heat flux transferred from the roof to the ceiling of the room. The air temperatures in the rooms are also recorded. From the recorded data, it is understood that the air temperature is lowest (32.9°C) inside rooms with elevated PV panel on roof and highest (33.2°C) inside rooms without any cover, in the month of February. It is not a significant difference but a difference nevertheless. The values were slightly higher in the month of March but the cooling effect of PV panels is evident.
Comparison of ASHRAE peak cooling load calculation methods
Published in Science and Technology for the Built Environment, 2019
Chunliu Mao, Juan-Carlos Baltazar, Jeff S. Haberl
The two key elements in the sol-air temperature calculation are the total solar radiation incidence on a specific surface and the outside dry bulb temperature. By providing measured data for both elements, the sol-air temperatures were recalculated for each surface and applied to all the methods.