My All Round Experience at Eenovators

Energy auditing has been the big thing in the energy sector since the law was passed in 2012. Although I
may not be amongst the best writers known, here I am and this is my story.. Many of my colleagues will
agree to this; it is usually an engineers’ inside joke – that ‘we’ are not good in English – but heck, we are
kings and queens in math right?
Okay, back to serious business ………. first of all, I will dearly miss the Eenovators family. I have learnt a
lot from them not only career-wise but also on life skills. Secondly, you can call me ‘the youngest energy
auditing guru’. I promise I have learnt a lot on Energy Auditing. I mean, what do you expect after
learning from the best professionals on this field?
There are a couple of things that I have learnt in this period that I really found very interesting. One –
free cooling system. Free cooling saves energy and operating expenses at Telecommunications sites and
chilling water in industrial sites, where the application of traditional air conditioners has resulted in very
high energy costs. By using free cooling, the overall thermal management running expenditure can be
reduced by up to 90%. The working principle of free cooling is simple; when outdoor temperatures are
lower relative to indoor temperatures, this system utilizes the cool outdoor air as a free cooling source
and when the outdoor temperature is higher to indoor temperatures, the air conditioner automatically
comes on.
Another thing is the air curtains. This was one of the recommendations that the flower farms needed to
install at the cold room doors due to the heat exchange. The following is an explanation in detail on how
the air curtain works. Generally the air entering through the inlet grille, sometimes with filter functions,
is compressed by internal fans and forced thought an air outlet, which is directed at the open doorway.
The filter protects the interior components (heat exchanger, fans, electronics, etc.) from dust and
particles.
The fans of the air curtain can be direct or belt driven. The most frequently used types are centrifugal,
axial and cross-flow. Some air outlets and/or lamellas can be adjustable to increase the performance of
the air curtain according to each situation.
All these principle are very interesting especially if you get to get to see them practically.
Finally, I would like to thank team Eenovators for the great support they have given us though this
learning period. Cheers!

Pauline Mweu
Jomo Kenyatta University for Agriculture and Technology

1 Comment

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