Abstract
In recent years, the amount of carbon dioxide emission in the civilian sector has been increasing. In this experiment, the so-called Toms effect, i.e. the effect of flow drag reduction when surfactant is injected to circulating water, has been verified to reduce the transfer power of circulating water for air conditioning systems of buildings. Concerning this effect, much basic research and a few applications to buildings have been reported. There is no clear report, however, on how to add the surfactant to the circulating water in buildings constructed with complicated pipework, how the flow and heat transfer performance change after the injection of the surfactant, and how to maintain the effect for a long time. Consequently, the technology using this effect has not yet been put to practical use. This paper presents the findings of the demonstration test using the air conditioning system at the Sapporo City Office Building. Generalization of the results will hopefully lead to the spread of this technology.
