This study reports the influence of lighting control methods on the acceptance rates in the relation between the task illuminance T and the ambient illuminance A in a steady state. Additionally, the visual performance and impression are analyzed. The acceptable A in a steady state under each T is predicted with considering illuminance preference by using a prediction method from the previous report which analyzes the acceptable T in a steady state under each T/A. The commonalities and the differences with the previous report, as well as their causes, are discussed.

Air conditioning loads, room temperature fluctuations are usually determined using weather data at hourly intervals. On the other hand, due to the high speed and large capacity of recent data logger systems, various observation data such as room temperature are often obtained at one-minute intervals. In addition, since November 2008, the Japan Meteorological Agency has begun releasing observed weather data at 1-minute and 10-minute intervals, and these data are now available. Based on these circumstances, the authors conducted a simulation and compared the effects of different observation time intervals on heat load based on the response factor method.

A study was conducted on the improvement of power generation for a window by solar radiation reflected from Low-E coat of a semi transparent photovoltaic module. This module is composed of a double-glazing that be installed a low-E glass in the indoor side and a solar module equally arranged linear double-sided solar cells in the outdoor side. As a result of outdoor verification, it was confirmed that annual power generation by Low-E coat increased by about 9%. The simulation also shows that there is a power generation advantage against the model using the square cell.