To ensure that solar direct drive (SDD) appliances can keep vaccines at acceptable temperatures continuously, the installed photovoltaic array often produces excess power that is not used by the primary cooling load and this excess power generally goes unutilized. If this power is to be used, the p...

Dear Technet members, I would like to share my thoughts on the temperature monitoring devices and thermostal for vaccine refrigeration system. In the early days of EPI, temperature of the refrigerator was measured and displayed by a simple analogue thermometer which was either a bi-metal or stem t...

WHO and UNICEF have just published a new evidence brief on solar direct-drive (SDD) vaccine refrigerators and freezers. It includes case studies from Tanzania, Colombia and Kenya, as well as an overview of SDD technology and how to make sure that SDD technology is the right choice. Here's the link: ...

We are happy to announce the latest version of the Total Cost of Ownership tool for cold chain equipment (v1.4) is now available to download and use. If you have been using an earlier version of the tool, please download the latest version from the link below.   Version 1.4 includes filte...

Dear viewers - sharing the following for needful Universally it is very well known that vaccination is one of the most cost effective public health programme from control to eradication of Vaccine Preventable diseases. Public sector is provided with proper cold chain equipments, periodic training ...

I’ve been reading with great interest the most recent issue of Vaccine, which is dedicated to “Building Next-Generation Immunization Supply Chains”. http://www.sciencedirect.com/science/journal/0264410X/35/17 I particularly enjoyed the following article but was surprised to read that the authors i...

Dear Technet Followers: Is there a universal recommendation for the distance a refrigerator should be from the wall. I have seen 1 foot, 10cm, 300mm, and 50mm on different documents from different partners. Thanks, Carla ...

We are working with ILRs. While daily operations, it was found that there is formation of water droplets inside the device. We want to measure the amount of condensation taking place inside the device in a day. We also tried to calculate the Dew Point Temperature but not much useful.   Kindly...

Knowing the problem of vaccines being frozen because of too cold ice-packs. What about freezers that does not get colder that minus 5'C...

Happy new year all, We are happy to announce that the latest version of the Total Cost of Ownership tool for cold chain equipment (v1.3) is now available to download and use. The latest version has a few minor changes to the presentation of data as well as the latest PQS pre-qualified equipment as ...

Dear TechNet members, I'm putting together a document on the performance of solar direct-drive (SDD) vaccine refrigerators and would like to request your assistance. If you have experience of SDD projects in the field I would be very grateful if you could share your thoughts on how well they have pe...

At B Medical Systems we have received lately more and more complaints about RCW50EG, absorption type vaccine refrigerator / ice pack freezer, that stopped working or never started working correctly. The largest complaint came from the EPI in Kenya with 200 X RCW50EG not working. The RCW50EG and the ...

Dear I like to share with you in this space a video about the instalation, basic maintenance and operation of one of the solar equipments with PQS that are installed in my country (Colombia), nowadays we have 300 equipments in operation. Best regards ...

Dear friends, Gavi, the Vaccine Alliance is very pleased to present the Cold Chain Equipment ‘Technology Guide’, to support the appropriate selection of modern, efficient and reliable technologies. Download the guide here. Identifying the most appropriate equipment choices for each health facility ...

Most ice-lined refrigerators in India are fully functional at 5 - 45 degrees Celsius (ie, they are able to maintain an internal temperature of 2-8 degrees Celsius when the external temperatures are between 5 and 45 degrees Celsius). Some states of India have an extremely cold climate during winters ...

Thanks to the flexibility of the TechNet-21 website, I can share two older (circa 1985) collections of densely technical and highly practical equipment maintenance documents developed by WHO using the TechNet Resource Library (TRL). Once only available in hardcopy or in a digital corner of the onlin...

Dear TechNet Colleagues,   I would like to share with you a report on our latest cold chain maintenance investigation in Mozambique: "Why Fridges Fail Part 2: RTM Data for Maintenance". We are beginning to document how remote temperature monitoring data and dashboards can be used by maintenance t...

Among the TECHNET postings on cold-chain equipment there are embedded remarks pointing towards the need to make vaccine refrigeration simpler and less expensive to procure, more responsive to energy changes and easier to use and maintain. For example, to choose a refrigerator now current WHO, UNICEF...

In cooperation with the Uganda Ministry of Health, PATH recently conducted a pilot study to document equipment failures in the Uganda National Expanded Programme on Immunization cold chain. Due to our use of purposeful sampling to locate a subset of failed cold chain equipment in Uganda, conclusion...

In case this new article published in Applied Energy is of interest http://www.sciencedirect.com/science/article/pii/S0306261916302793 AbstractAn intermittent solar adsorption refrigerator can supply cold needed in third world countries, especially for vaccine and medicine preservation. This paper...