Recent content by wufi2004

From Ashrae handbook chapter8, I can find angle factor from the figure, then I can use F1*T1+F2*T2+... to get the mean radiant temperature. How can I get the angle factor/view factor from Equations(not from a chart)? I need the equation to get angle factor and write a code.

Where can I find the total annual value of construction industry of Canada?

Thank you. In fact, only members can log in to see them all. I need the letter template. :( If you have it, please tell me autocad2004@gmail.com Thanks!

Where can I get the study materials

How to draw shear force envelope(beam) from 3 or more cases . When i draw them in one diagram, i don;t know how to link points to make the envelope. I need your help.Thanks!

1. Jump formwork can be used for highway? 2. Concrete pump is suitable for pouring a concrete column? Anyone knows? Please give me the reason. Thanks!

yeah, for nuclear reactors. So now i think it is no good to use air in the heavy concrete.

Will snowfall on freshly poured concrete pose a problem? I need help and reason. Thanks!

Could air entraining agents be used when making heavyweight concrete? Anyone knows?

Thank you, but i refer to TopVent that uses induced fan to distribute the supply air evenly for car parking area. Can u read the following page? I mean this kind of thing. http://www.nipponflakt.co.jp/en/products/tv/tv.htm But i cannot find its specification and catalogue.

You are right! Thank you for your help. I tried to find a catalogue of TopVent system(induced air jet) that is used for garage parking. But i found my effort on line not much useful. Who knows TOPVENT ? Where to find it? ABB has it, but i need details/catalogue for my parking garage design...

Who can tell me who sell these HVAC equipment.? I need the catalogue/specification of them.I'm in Canada. how to do pipe design for the garage heating when using unit heater? Assume using glycol and hot water. Complicated? Thanks!I need your help.

Thanks! Do i need cooling tower and auxiliary boiler for heat pump? Maybe this is the problem that i met. Thank you!

How to define hot water and heat pump in HAP? In the program, when i simulate HEAT PUMP energy, it gave me 0 BTU in winter time. And it reminds me i have no hot water source. Who can tell me how to solve it?

My basement wall is like this: _______________________________________ Ground Level | Basement 1 | |________________| <---- What is this slab floor called? | Basement 2 | |________________| <---- This is slab-on-grade or -below-? + + Besides...