This paper reviews existing studies and investigates thermal operational regimes of diamond bit during drilling operations. The operating temperature of the diamond core drill is studied under bench condition and an optimal thermal range are presented. Based on this study, it was noted that glazing of diamond tools is observed at temperatures less than 327°C, and normal wear of diamond tools is...

Policies, codes, standards and voluntary ‘green’ assessments have exacerbated cooling demand in New Zealand’s commercial buildings. Building codes allow designs to use single glazing on the facade, criteria are not higher than legal minimum code inexpensive energy for buildings all contribute an increasing of air-conditioning. Legal efficiency building envelope significantly changed over a quar...