Chapter 11. The Influence of Mean Radiant Temperature on Healthy Office Buildings with Glazed Facades


Fernando del Ama Gonzalo1, Belén Moreno Santamaríaand Juan A. Hernández Ramos3
1Department of Sustainable Product Design and Architecture, Keene State College, New Hampshire, USA, NH, USA
2Department of Construction and Architectural Technology, Technical School of Architecture of Madrid, Universidad Politécnica de Madrid (UPM), Madrid, Spain
3Department of Applied Mathematics, School of Aeronautical and Space Engineering, Universidad Politécnica de Madrid (UPM), Pza. Cardenal Cisneros, Madrid, Spain

Part of the book: Sustainable and Healthy Building Environments


The Mean Radiant Temperature (MRT) is the total sum of the walls, floor, and ceiling temperatures, taking into account the solid angle formed by each of them from the measurement point. MRT also influences comfort indicators, such as physiological equivalent temperature (PET) or predicted mean vote (PMV). What we experience and feel concerning thermal comfort in a building is related to the air temperature and the temperature of the surfaces in that space. Office buildings are one of the most energy-demanding typologies since the cooling requirements are much higher than those required in residential buildings. Glazed enclosures favor natural lighting but cause high thermal loads due to solar radiation. Usually, office buildings’ cooling systems comprise air-to-air heat pumps and indoor split units. However, radiant systems such as chilled ceilings and walls are considered more effective in increasing the comfort of the occupants. This chapter discusses the influence of the Mean Radiant Temperature to achieve a comfortable environment in office buildings exposed to solar radiation and how it improves the predicted mean vote of users. In addition, the chapter proposes an analytical method to calculate energy savings and measure the influence of different radiant indoor surfaces, such as Water Flow Glazing facades or partitions and chilled ceilings.

Keywords: mean radiant temperature, Water Flow Glazing, healthy office buildings, glazed facades, sustainable architecture


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