Daylight harnessing technologies are applied to bring diffused daylight into the building interior. There are many available methods and technologies available to harness daylight and this section covers three selective technologies, which are commonly found in good practice and yet highly applicable in developing countries. They are light shelves, light pipes and skylights. They can be deployed independently or in combination, depending on the building’s configuration and functions.
|Direct casting for iron and steel sector||
The iron and steel sector is the second-largest industrial user of energy, consuming 616 Mtoe in 2007 and is also the largest industrial source of CO2 emissions. The five most important producers – China, Japan, the United States, the European Union and Russia – account for over 70% of total world steel production. A main technology in the iron and steel industry is the direct casting, which is the process of creating finished iron and steel products using moulds to shape the molten metal.
|Direct Injection for internal combustion engines||
Direct fuel injection is a technique that allows gasoline and diesel engines to run more fuel efficient. Direct injection techniques are already commonly used in modern diesel engines and are becoming more and more established for gasoline engines. Direct injection engines can lower the CO2 emission of the vehicle by about 15% with low extra costs compared to other techniques leading to similar CO2 emission reduction.