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Hi, I am sorry for not being more precise. I am thinking on ventilation systems where air is supplied through the grilles located low in the wall or underfloor. I haven't done so many HVAC system, only few systems where supply/extract diffusers are located at ceiling. So I calculate...

Hi, can anyone give me any guidance on how to design displacement ventilation system? I am reading nowdays about it, and I see it is low velocity, with low temperature difference between supply and room air. But can any one just guide me what shall I calculate, how to determine ariflow rate...

Hi, thanks for your reply on this. Regards

Hi, I am beginner at Ventilation and air conditioning and I have some beginners question. I am interested in how is the amount of extraction air determined? In the books I read, it says "amount of extract air is usually the same as supply air"... However, I am working on some projects and I...

Hi, I don't know if this is the right place for posting this questions, but since I haven't found subsea section of forum, and I am currently working as structure design, I decided to post it here. :) I wonder if somebody can help me with the following issue. I need some help, regarding ROV...

Yea, okay...Thanks for your advices

I would also do this, but unfortunately I am that engineer in this case and this is my first project of this kind. So I can't hire anyone but have to come up with a solution. Thanks

Hi. Could anyone help me on this topic. I need to reconstruct existing heating system. System already have 2 separated boilers (independent stations) and now I am asked to add third one, and to reconstruct everything to be as it should be (multiple bolier system). I have never done this before...

Hi, sorry for delay. It is being installed in a vertical position because of the available space. Unfortunately I'm not the one who will say how it is gonna be, because I'm just a beginner in the company (new one). THanks

Thank you for your advices. @pennipiper it isn't like you said. It is just an vertical heat exchanger for itself @gr2vessels I think like that as well. It is Pressure Vessel. But as I said, haven't seen any so far on the legs. Thanks

Hi, I have a question regarding vertical heat exchanger supports. I'm curious is it allowed to put vertical HE on skirt, or legs? I've done a lot of vertical HE so far, but I have never seen that kind of support (legs, skirt) for vertical HE yet. Every heat exchanger I have made so far has...

@heatexguy, After I have found that book, I saw the calculation and that is it. Thanks a lot to all. Cheers

Ok, thank you for your reply and help. Can you tell me is that method acceptable and correct for inspectors and other approval authorities? Thanks

Hi, I need to calculate an air coolers headers acc. to ASME. I'm using appendix 13 for boxes, but I need to calculate rectangular bolted cover. I have found one thread here posted in 2002 saying that I should use UG-34 and bolt load to calculate acc. APP-2 (for circular flanges). My question...

Hi, could someone say to me how does the EN-13445 take into account tubesheet calculation, when client specifies differential pressure. In EN-13445 code I couldn't find anything regarding differential pressure on tubesheet, while in ASME DIV 1 is clearly stated that "if there is differential...

Hi, thank you all for your answers.... I'll try find out BTH-1... Lifting Lug I need is for erection only. I've seen codecalc calculation of LL but I couldn't manage to figure out from where did they get those formulas.

Hi, could anyone recommend me some good literature (procedure) for Pressure Vessels Lifting Lug calculation. Thank you in advance.

Hello...Could someone help me on underground garage ventilation. I need some standards that I can use for my calculation. I've found that a lot of calculations are made acc. to DIN 18232, but I don't have that DIN...Can someone guide to some website for this DIN or eve better if someone have...