Mois : décembre 2017

décembre 6, 2017 issamsemlali No comments exist

By NZWB (Net Zero Waste Building) we mean in this article a building that reuse, recycle and/or valorize all the waste produced inside this building. This concept was created to fight against incinerators and undesirable landfills, and it has been adopted by many municipalities in New Zealand, Australia, New Scotland and the United States of…

décembre 6, 2017 issamsemlali No comments exist

No doubt that today the record of PV efficiency belongs to SOITEC that has reached 46% (four junctions with concentractor) according to NREL and which is still at a research stage. But here we have a commercial prototype of a very rare PV panels which specs are: Triple junction which deliver 40% efficiency. Combined heat…

décembre 6, 2017 issamsemlali No comments exist

The use of the drain water heat recovery has become usual when owners seek some energy recovery in new constructions or during renovations. However, it is obvious that due to the design of this particular piece of pipes induces a relativeley consistent pressure loss (too many loops with a D shape tube). So at the…

décembre 6, 2017 issamsemlali No comments exist

I attended last year and also in January two ASHRAE conferences about the use of CO2 as refrigerant in the chillers. I shared the subject in the form of a scheme that highlights the idea of captation of emitted anthropogenic CO2 and reuse as refrigerant. As I did not get feed back from Ashrae members…