Thermal performance indicators for refrigerated road vehicles
暂无分享,去创建一个
An experimental evaluation of insulation effectiveness, pull-down times and effectiveness of a mechanical refrigeration unit was performed on five refrigerated panel vans. Additionally, a mapping of temperature variability in the cargo space was carried out during a simulated journey encompassing several door openings. The temperature variability measured in the vans was neither correlated to the effectiveness of the insulation nor the time required to achieve complete cooling of the cargo space. These criteria are common thermal performance indicators used to evaluate refrigerated vehicles in international standards. The efficiency of insulation was correlated to the pull-down times, presenting the possibility of calculating the former as a function of the latter. The temperature variability was correlated with the time required for the unit to recover temperature control after a door opening and the difference between the maximum and minimum temperatures reached during a door opening cycle.
[1] Do Sun Bai,et al. Control charts for positively‐skewed populations with weighted standard deviations , 2001 .
[2] Do Sun Bai,et al. Process capability indices for skewed populations , 2002 .
[3] Jiju Antony,et al. Implementing Six Sigma , 2001 .