Ibrahim Mohammad

How did you managed to be "Doctor of Philosophy" with education

Sep 2017–Jul 2020 Dalian University of Technology Plasma Physics · M.S China

Thanks for your comments,

Please try to give an answer, instead of looking at personal profiles. Maybe this question is not according to your set standards, but still, a question may be helpful for the RG community.

Dear Yurii V Geletii

If you are really interested in my personal profile, please ask me by personal message, Maybe it will not increase your RG score that I guess already high enough but it will increase RG standards as compared to other Question and Answer Forums.

Your question is definitely helpful for the RG forum. It's an excellent example of questions which should never be asked on any professional forum.

"It will increase RG standards as compared to other Question and Answer Forums." The quality of many questions and answers in this forum are already beyond of any reasonable standards. It's not necessary to further decrease RG standards.

Your personal profile is public and I have the rights to ask you publicly about your "Doctor of Philosophy" degree

Dear professor Yurii V Geletii , please keep your time and effort. We should learn how to ask first and then come to type a question here in RG.

Ibrahim Mohammad Please try to rewrite your question in a way that we can more clearly understand what your question is. What do you mean by Electrolzer, SPV and PEM? It is a good practice to define all acronyms the firs time they are used.

Dear Prof. Rick Manner

Thanks for the answer, and sorry for not explaining some terms.

As electrolyzer is used to produce hydrogen by splitting water into hydrogen and oxygen by using electricity and hydrogen fuel cell uses hydrogen as a fuel to converts chemical potential energy into electrical energy. And it’s common that people use extra waste energy produced by SPV (solar voltaic system) in electrolysis to produce hydrogen and in the absence of sunlight they use this fuel hydrogen to produce electricity by using a fuel cell. And my question is it possible that electrolyzer and fuel cell work together supply each other electricity and hydrogen fuel? If we already lost energy due to heat and always get less energy by fuel cell than we have spent on electrolysis, so maybe these processes are only for energy storage.

Sorry for my bad English as I didn’t explain a very simple question very well.

SPV, Solar voltaic system

PEM, Proton-exchange membrane

Dear Yurii V Geletii

Sorry to say, your answers are also examples that RG should also control non-professional and irrelevant answers.

At first, you think these questions should not be asked on this professional forum, and when you give an irrelevant answer to a question, you think it's your right to discuss anything at any other discussion because of its public.

I think your answers have also contributed to making this RG stranded as you have high RG score by asking about academic qualification instead of giving answers.

Anyhow Thanks for your answer.

Dear Ibrahim Mohammad ,

I really appreciate much your decision to remove inaccurate information from your profile. Yurii

Sorry, gentlemen, that I interfere with your intellectual conversation.

In my opinion, this is a completely concrete question and it sounds like this: Can the Useful Action Ratio of a really made “Electrolyzer ↔ fuel cell” complex be ≥ 100%. The answer is simple: no, it cannot.

P.S. It is precisely for this purpose that forums are organized so that researchers do not waste their years of life on unrealizable things.

I believe your question is about what to do with any excess energy produced during daylight hours by photovoltaic solar power generation. Battery storage and H2 production via electrolysis are two commonly discussed ways to store electricity. Pumped storage of water to higher ground (or elevated tanks) so it can be run through a hydroelectric power generator during off-peak solar is also a commonly proposed technique.

Battery power storage is probably the best way of storing excess power to time shift its use for most small (and many large) applications. Battery life and environmentally acceptable disposal of dead batteries are issue

I am not a fan of producing H2 and burning it to produce electricity. H2 is a dangerous substance that burns with an invisible flame and its not a very good fuel. I prefer using H2 to clean up fossil fuel and producing it via Hydrotreating or produce methanol or Fischer –Tropsch liquids.

Pumped storage is usually used at locations where there Is already hydroelectric power generation. It may not be as practical as a standalone power storage technique.

I hope this answers your question.

@Muzammil Iqbal

Normally I would agree that posters on social media site should leave enforcement of inappropriate behavior to site management. However the management at this site doesn’t seem to be concerned with monitoring inappropriate activity or enforcing any rules. Yuri is treating this site as if it is a professional scientific research site and imposing stricter standards on users he believes are acting in an inappropriate manner. I hope site management will step up and enforce some basic rules to avoid rampant cheating but so far it doesn’t seem they are willing to do that. As a result, some have resorted a system of vigilante justice.

Dear Andrii Shevchenko,

I understood the question exactly as you did. As you correctly pointed out that the answer is evident. The Doctor of Philosophy must know this answer. Therefore, I answered the question by asking whether Ibrahim Mohammad has the PhD degree. It appeared that no.

Dear Rick, I completely agree with you " I am not a fan of producing H2 and burning it to produce electricity. " The energy density of H2 is too low to use it for the energy storage

Dear Yuri.

In one cylinder, an internal volume of 40 liters with a pressure of 15.0 MPa (2175.56 psi) stores 6 m3 of hydrogen, which corresponds to 21 kW h of electricity, and in an acid accumulator 6CT75 - 0.9 kW. The energy stored in one hydrogen tank corresponds to the energy of 23 6ST75 batteries.

Dear Andrii,

There are two different parameters:

Specific energy (SE) is the amount of energy stored by mass (weight),

Energy density (ED) is the amount of energy stored per volume (weight).

ED for Acid batteries 0.1 kW/L, H2 (liquid) = 2.7, Gasoline (petrol) 9.5

ED is the most important value for transportation purposes.

I completely agree with you, Yuri. There is no unambiguous solution, it is necessary to compare hydrogen and gasoline in a complex. Each fuel has its own advantages and disadvantages, and what type of fuel can you say more for a very long time and everyone will be right (the strengths of hydrogen manifest themselves when energy is converted to a unit of weight. In this case, it is already three times as high as gasoline (143 MJ / kg vs. 47 MJ / kg.) Wins hydrogen by this indicator and electric batteries.With the same weight, hydrogen has twice as much energy as an electric battery.

All factors should be taking into account when you compare hydrogen, gasoline or batteries. In overall the "price tag" (e.g. the cost of driving 1 mile, the cost of 1 kW.h energy generated) tells what is the best. I have an electric car, it makes 4 miles for 1 kWh, which is more than 10 times cheaper than driving a gasoline car.

Yuri if incremental power is from a clean source your car my be environmentally friendly. If it is inefficient dirty coal based power your car may create more pollution than a gasoline or diesel powered vehicle.

Rick,

I know very well what you mean. I don't say that my car is environmentally friendly. I say that I pay much less for driving 1 mile. In addition I charge my car at night, when the electrical power has a very low price.

It would be nice if incentives were properly designed to develop a path toward a sustainable future. Unfortunately politicians aren't smart enough to know how to do that and even if they did they would prefer rewarding their supporters over doing the right thing.

Poster Hotspots of Solar Potential in India

No there is always a small loss as heat, also a theoretical ideal yield for any set of operating conditions.