does anyone know cltd provisions for basement wall heat loss calculations? in manual j calculation there is separation between basement walls and other walls, but i did not notice anything similar in cltd method.
under basement wall i mean outside wall that is fully or partially in contact with...
currently it is noticeable that there are many young people or beginners that are joining this hvac forum.
in general i am delighted about that, but such situation also imposes that more emphasis be given to basic principles of engineer's work, for mere sake of practicality. without knowing...
Currently I am being pushed by prospective client to design VAV system for multi-zone space where there is number of conference rooms because "he has seen it working well".
I am concerned about how to ensure minimum outdoor air requirement in situation where zone peaks can occur in quire...
I would like to hear experiences about taking into account open refrigeration display fixtures in supermarkets.
ASHRAE handbook gives one table which provides net cooling effect of such fixtures.
It is stated assumption, however, that condensers of those fixtures are placed outside cooled...
Anyone has experience with bakeries?
My concern is related to the fact that room with ovens has no separation from several other process rooms.
Ovens have cinematic gas burners, and there will probably be no chance for ventilation to not disturb adequate combustion air supply, though heat...
I would like to open discussion about current practice of everyone who calculates thermal loads these days.
Infiltration was allways hard to define, and the most honest approch is desribed in some ASHRAE papers, where all figures given by norms were declared as a guide only, and discretion of...
I make precise calculations of U-values for (European) construction elements, but as values significantly differ from those in tables of J Manual (though actual construction elements are similar), I dare not using them in J Manual calculations as I have idea that U-values in J Manual are...
Dear colleagues,
Using different load calculation programs over years, I was in touch only with demo version of HAP.
Now I am considering buying a full version of HAP.
Any comments on long-term usefulness in practice?
[sunshine]
I am consulting design development of several underground car parks.
My client heard from several sources about "fantastic innovation", that is jet fan ventilation instead of classical system with ductwork. He asked me to make investigation.
I found 4 such systems within my small country, all...
I am very curious in how it goes in practice of different countries.
In my country, new regulations for building thermal protection are introduced. These include detailed calculations of building thermal protection adequacy. Calculations are very close to standard HVAC heat loss/gain...
My budget allows me to buy some HVAC design book. This one I couldn't check neither myself nor by my trusted colleagues:
"HVAC Principles and Applications Manual" by Thomas E. Mull,
while I have read controversary comments on Internet. If you know this book your suggestions will be very...
Please could somebody provide good web sites and links for steel piping system installation/guidelines/tips etc.
Being in charge for many installations, I've never found good material on web related to this. On contrary, for all other types of installations, was it plastic piping or any...
Yes, all of the question is already in the heading!
Actually, I have just one quotation for such thing, which seems very expensive, and now I need a little competition of bidders.
Location of client is Europe!
Thank you in advance.
[sunshine]
I know that it may seem trivial to someone, but this question is rather interesting to me in recent period.
In machines built 5-7 years ago we still have habit of venting hydraulic system after major repair or oil change, especially in applications where stable and precise stroke is critical...
Hello!
I am a mechanical engineer working in intesive maintenance operation. I need recommendation for little/pocket/basic (all that means inexpensive!) book on elementary circuit components. I don't need design manual, theory. I need basic explanation on physical construction, probable...
Hello!
I am a mechanical engineer working in intesive maintenance operation. I need recommendation for little/pocket/basic (all that means inexpensive!) book on elementary circuit components. I don't need design manual, theory. I need basic explanation on physical construction, probable...
Does anybody knows some international industrial/maintenance/engineering consulting company that has south of Europe as area of interest (especially Croatia and Bosnia and Herzegovina)?
Who knows the best approach to compressor room heat exhausting problem. Installed power is ca. 650 kW so any kind of cooling seems very cost ineffective as maximum allowed room temperature is 35 Deg. C, and max. outside temperature is the same! I am considering different ventilation options, but...
I need some kind of sealant spray to protect electric sensor contacts in wet area. The problem is that I cannot find any which is permitted in food industry. Somene has some link?
