JAUE2022-012: Analysis and Solution of Excessive Humidity and Condensation in a Nori Product Pricing and Distribution Facility

Abstract

Excessive humidity and condensation can harm the health and comfort of building occupants, damage the building and its contents and increase energy consumption. Facilities handling foodstuffs must consider the building temperature and humidity environment as an essential aspect of their design. This study analyzed the effects of ventilation systems and thermal insulation performance of the building envelope on indoor temperature and humidity stability through long-term field measurements. Temperature and humidity measurements were carried out at a pricing and distribution facility for nori products in Kumamoto, where temperature and relative humidity were measured continuously at 10-minute intervals in the ground floor storage room and the first-floor room over a period of one year. Over a period of four months, temperature and relative humidity were measured continuously at 10-minute intervals in the ground-floor operations room. The causes of excessive humidity and condensation in the building were analyzed, and measures and strategies to be implemented were suggested. The results of the study indicate that in addition to the ventilation system and thermal insulation performance of the building envelope, which influence the temperature and humidity stability in the room, the ability of the interior decorative materials to regulate humidity may be a factor that plays a vital role in indoor humidity. Installing thermal and moisture barriers, using humidity control materials for walls, floors, and ceilings, and replacing ventilation fans that meet specifications can prevent excessive humidity and condensation problems.