Modeling of Algal Gorwth and Death on Exterior Walls of Buildings

Abstract

This research aims to quantify the relationship between airborne algal growth/death on the exterior walls of the building and environmental factors such as surface temperature and humidity. Based on this, the study proposes a prediction model for the algal growth, where the algal growth was evaluated as algal cell number. The proposed model was used to simulate the change in algal cell number (growth and/or death), taking into consideration the temperature, humidity, and incident solar radiation. Results indicate that the algal growth rate agreed well with the measured L* value (brightness).

Complication–simplification spiral in hygrothermal research

“…For example, by regarding microorganisms, such as mold or algae, as a kind of material, a clearer understanding became possible. 46 5. Human thermal physiology and psychology 5.1 Uniqueness of Japanese architectural environmental engineering…”

“…© 2015. 46 Reprinted by permission Figure 6. Comparison of the measured and calculated core temperatures.…”

“…I guess and hope that such an extension of research objects (complication) will show us another new world and a clearer and simpler image. For example, by regarding microorganisms, such as mold or algae, as a kind of material, a clearer understanding became possible …”

“…© 2015. 46 Reprinted by permission Because a relatively reliable thermal physiological model was constructed, I moved to human health, that is, comfortable sleep. 53 In this research, we showed the following: a detailed thermal model that divides a body surface into small parts is necessary so that the contact with bedding can be considered; posture changes, such as tossing and turning, should be suitably taken into consideration to predict the skin temperature with reasonable precision; and it is possible to predict the skin and core temperatures by considering these carefully, meaning that the heat transfer process (physical process) is essential in the opposite sense.…”

Moisture Research in the Field of Architecture, Japan

“…(2) Microorganism In order to control the growth of fungi on the external walls of buildings (Tsujimoto 1992), an examination of the relationship between fungi growth and the ambient air temperature and humidity, and a proposal for the growth model have been implemented (Miyauchi 2008, Nakajima 2015.…”