Japan

Estimation of Cooling Energy Reduction by Utilizing Cross-Ventilation in Detached Houses, within the Japanese newly introduced Energy Regulation - Evaluating Energy Consumption for Different Uses

Submitted by on Fri, 10/25/2013 - 16:53

The reduction of carbon dioxide emission due to energy consumption in the household sector is an urgent task, worldwide. As a measure to respond to the task, a new regulation has just been enforced since April 2009, in Japan. This regulation evaluates the energy performance of detached houses by estimating the primary energy consumption for different uses, namely, heating, cooling, ventilation, domestic hot water and lighting.

PROPOSAL OF JAPANESE STANDARD OF THE MEASURING METHOD OF AIRFLOW RATES OF BUILDING EQUIPMENTS

Submitted by on Sat, 07/06/2013 - 16:42

The measuring method of airflow rates of building equipments is important and is required in manystandards, codes, etc. and the committee of the ventilation planning in the building of SHASE (Societyof Heating, Air-conditioning and Sanitary Engineering), Japan is about to propose the standard for TheMeasuring Method of Airflow Rates of Building Equipments. It is aimed to ensure the quality of indoorenvironment and the performance of HVAC system under the situation that the existing methods are inthe variety but less information for the choosing and its feasibility is available.

ENERGY CONSUMPTION AND MITIGATION TECHNOLOGIES OF THE BUILDING SECTOR IN JAPAN

Submitted by on Sat, 07/06/2013 - 16:41

Since the primary due period of 2008-2012 of the Kyoto Protocol Target Year is close at hand, specificmeasures for the prevention of global warming should be implemented in all areas. This paper outlinesthe energy consumption and greenhouse gas emission trends in the residential and commercialsectors in Japan. The paper presents the projections of CO2 emissions until 2050. The projectionsindicated that if the various energy conservation measures were implemented, up to 59% of reductionin CO2 emissions against the 1990 level can be achieved.

Simulation study on an air flow window system with an integrated roll screen.

Submitted by on Sat, 07/06/2013 - 16:25

A numerical calculation procedure for an air flow window (AFW) system integrated with a roll screen is presented. Both beat and air flows within the window elements such as the outside pane of glass the outside air space, a venetian blind, the inside air space and a roll screen, are taken into account by considering the thermal and air flow networks. Agreements between measured and calculated results of temperatures and pressure differences through a series of experiments carried out in an environmental test chamber were observed.