OpenIDEO is an open innovation platform. Join our global community to solve big challenges for social good. Sign Up / Login or Learn more

Scientific support to gather data and evaluate designs

I look for scientists that are willing to share their knowledge on a short term base

Photo of Rainer Winkler
0 2

Written by

My main focus is still the cooling of PPE. But there are also solutions like a pop up tent for home care which is developed and due to be tested in West Africa. Scientists and engineers should provide this groups with the best possible support.

Stopped - 16 December 2014

I stopped the search for solutions in the moment.
The main problem appears to be acceptability of any solution. A solution has to prove that it is save. Either there is no modification to the PPE, like cooling vests or pads under the PPE; or cooling from outside, like providing cool spaces. But each modification to the PPE raises the question of proving and certifying the security of the solution. This is probably to difficult and time consuming to be done fast.

First Venting Prototype - 7 December 2014

I build a first prototype for a filtered ventilation of a PPE. It uses a 3M 2135 particle filter and a small radial fan. It deliveres about 1 liter per second filtered air at 13.8V and 0.16A. With fresh air at a dew point of 25 °C entering and totaly saturated air at 35°C leaving, the theoretical maximal cooling power due to evaporation would then be about 50 Watt.

Temperature in treatment centers - Update 6 December 2014

Médecins Sans Frontières gave me the following answer regarding the temperatures in the treatment centers "the temperature in the tents is more or less the same than outside, ranging somewhere between 28/30 degrees" (

Update 4 December 2014

Fighting Ebola (Twitter @EbolaGC) proposes to post new ideas still on openIDEO ( 
As the coordination of volunteer development for ideas is still not effectively working for me, I have to decide on myself where to put the priorities. In the moment I design a prototype for a device that vents the PPE with filtered air from the environment. This is quite similar to this idead . This idea was also highlighted in the challenge. And it appears, like no team works on this, so I try to do this.

Update 2 December 2014

The material of the Tychem Coveral has a polyethylen coating of about 30µm thickness. This should block water vapor transmissions through the coverall so much, that this his a neglible effect on evaporation cooling. The total values for evaporation cooling given by some authors, should therefore be caused by a slight venting of the cloothing during the activity of the workers.

Update 28 November 2014

I still did not manage to find temperature data for Ebola treatment centers. The feedback I receive, looks like clothings or ergonomics specialists are are not yet involved.
In the moment I am building a first simple clothing model for a health care worker in protective clothing. I need this, to assess the effectiveness of simple changes in wearing the PPE.

Update 24 November 2014

I now start with an quantitative assessment of the proposed ideas for cooling. Up to know I was not successfull in getting quantitative informations on temperature, humidity, wind speeds and activity level of workers in protective clothing during the current epidemic. I am therefore forced to use best guesses for this.

Update 23 November 2014

I updated the research contribution with new data on the cooling in protective cloothing. Evaporative cooling is also for a Tychem QC more important than convection or radiation cooling


[1] V. Cavarello et al., "Apparent evaporative resistance at critical conditions for five clothing ensembles," Eur J Appl Pyhsiol, vol. 104, pp. 361-367, 2008

Attachments (1)

Ebola PPE assessment - facts only.pdf

A preliminary description of amount and type of cooling in a PPE (Tychem QC)


Join the conversation: