{"id":21892,"date":"2025-06-26T15:30:01","date_gmt":"2025-06-26T14:30:01","guid":{"rendered":"https:\/\/www.va-q-tec.com\/?page_id=21892"},"modified":"2025-06-26T15:30:11","modified_gmt":"2025-06-26T14:30:11","slug":"kelvin-hours","status":"publish","type":"page","link":"https:\/\/www.va-q-tec.com\/en\/thermal-engineering-services\/tools\/kelvin-hours\/","title":{"rendered":"Kelvin Hours Calculator"},"content":{"rendered":"\n
\n
\n
\n
\n
\n
\n
\n
\n
\n
\n
<\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/div> <\/div>\n
\n

Kelvin Hours<\/h1>\n <\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/div>\n\n\n\n
\n
\n
\n

KelvinHours is a statement about the degree of temperature stability that a transport solution can realistically attain.\u00a0<\/em><\/p>\n

 <\/p><\/blockquote>\n<\/div>\n <\/div>\n <\/div>\n <\/div>\n\n\n\n

\n
\n
\n

A simple comparison of qualification data under different temperature profiles does not generally provide a reliable statement. Different temperature scenarios impact thermal packaging in different ways. To allow a reliable comparison, these differences are considered in the determination of KelvinHours. They represent the best means of obtaining an objective comparison of different thermal packaging solutions. To determine the number of KelvinHours, you need two variables: the expected transport time and the expected average temperature difference to which the packaging solution will be subjected. The product of these two variables represents the number of KelvinHours.<\/p>\n<\/div>\n <\/div>\n <\/div>\n <\/div>\n\n\n\n

\n
\n
\n
\n
\n

ISTA 7D for 72 hours<\/h3>\n <\/div>\n <\/div>\n
\"\"<\/div>\n
\n

This graph shows the performance of the box under\u00a0standardized conditions, but it does not reflect the kind of individual loads that it can be subjected to during transport (e.g. longer transport times,\u00a0more extreme peaks, longer peaks).<\/p>\n

How can you tell if the graph presented to you reflects the actual real-world challenges?<\/p>\n <\/div>\n <\/div>\n <\/div>\n <\/div>\n\n\n

\n
\n \n\n
\n
\n
\n
\n
\n

Kelvin Hours Calculator<\/h3>\n <\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/div>\n\n\n\n
\n
\n
\n\n
\n \n