Recent content by Ali Durrani

I started at 30 bars, but the cycle efficiency at 30 bars was way lower, the work output was hardly 1.5 MW but lowering boiler pressure up to 10 bars and the theoretical thermal efficiency of the cycle achieved was 23.94 % which is a nice figure for a starter for a waste heat recovery, Note...

Sorry if i have offended you, i just want to setup a rankine cycle, i am not going to fabricate that, i don't think there is any problem with asking this question, i just want to know what is the usual trend for steam pressure in AQC boilers, because my available thermal energy is quite less so...

Hello Guys, I am a mechanical Engineer working on a semester project, to design a waste heat recovery system for a cement plant Air quenching cooler (AQC). For WHR i have to first design a AQC Boiler. According to the Data provided by the plant incharge, Air at the exit of cooler has a volume...

Right i have two questions, Is enthalpy term associated with a non flow process? because what i have understood so far is that Enthalpy actually is the internal energy plus the flow work, and in a non flow process there literally is no flow so how can enthalpy be there? because in U+PV, PV is...

Please check my calculations: The half reaction at cathode ; 4e + 4H2O ------> 2H2 +4OH this means 1 mole of electron can produce 0.5 mole of Hydrogen gas. now for example i want to produce 1 gm of h2/sec this means 3600gms in 1 hour so no of moles is = mass of H2 required/molar mass of H2 so no...

Bystander? sir i used faraday but its giving me an answer of a very large amount of current

Ok ok i have mistaken its i am applying a potential of 2 volts and i need to find out the amount of current can you guide me please? i am very weak in electrical stuff

ok i want to make 1g/sec of hydrogen out of an unlimited supply of water, i know the electrolysis won't start below 1.48 volts, let suppose i am supplying 2 volts of DC current, i need to find out the total wattage for electrolysis, for this i need the amount of current required to produce 1...

ok then i was right hahaha thanks, i was in a talk with a senior person i don't know why was he arguing with me on that but he said energy is not conserved and he said he can prove it, then he said he give me 2 kW of power and i can give you 10 kW of power :P and i was like yes its possible but...

Ok i have this very basic question, Is power in a system conserved or not just like energy is conserved? because for example there is a spring compression setup where i am supplying 2 joules/sec of power for around 10 mins to compress the spring, now after 10 mins i leave it abruptly and it...

ro is the density sorry i missed it lol

I am a bad engineer but let me give it a try :D I couldn't understand the question properly but what i assume is that initially the rubber cylinder is flat and immersed in water, if it is immersed horizontally in water the total pressure is P=ro*g*H, now when you inflate the cylinder and...

I am a bad engineer but let's give it a try :P This question is not very clear, please provide some more information, is the cup stationary or moving, what is the hose dia, what is the velocity of water? Assuming the simplest case, the flow is steady, you have first imagine a boundary across...

Yes that was the target values that we has achieved, maybe because calibration would have just shifted the graph in one direction, either up or down, But i didnot understand one thing, how is the turbulence or vortex going to affect the measure of exhaust gases? after all the same amount of gas...

Bro i am not good at making graphs so i did not know which plot would suit better as you said about the calibration, so this i think is the problem we did not calibrate it, because we don't have any facility of gas analyzer in our labs, we did it in a gas station and the person told us its fully...