Recent content by machinest

what type of the two fluids used in this heat exchanger? the most imp formula which is used with the exchangers its doing the heat balance for these two fluids,lets say its a condenser, so the two fluids are the steam and the water, the formula used: heat added to the water(Qadded)=the heat...

still waiting ur help russ with the instructions of using the elite software thanks for the forum.

hi russ, well,if you remember,i had asked the same question before,and u gave me that site and i got the software and set it up on my pc,but it really need someone to tell you how to do the right selection of ur split unit,and how many BTU's u need to cover ur area,where you are,so if you...

thank you russ,but may i ask you one more thing,being polite? cant you just tell me what are the steps i should follow to size air conditioner"knowing how much cooling/heating load in BTU"for a single room which is: length=4m&width=4m&hight=3m,including a glass window which...

thank you russ for ur answer, im doing a new project now with rhvac software,all what i want to use it for is to size a split air conditioner to be installed in a room,so I am giving it the inputs,but it asked me about two things i don understand it which is "latitude"&"elevation",what does...

well,the formula of the dynamic head is"H=P/W",where p:pressure&W:specific weight=density*acceleration"g",of the fluid passing in the tube. u can apply the bernouli's equation as russ watters mentioned in his reply,between two points,say point"1" at the surface of the tube and at point"2" at...

hello russ, i got the rhvac software also,its one of the elite software,and used it and till now,i don't know how to use it to calculate the cooling loads,may u help me telling me the steps to get it done? waiting ur reply. thanks in advance.

the icon of the software after installing show a duct,and its name is"ductsize",so is that the same software u use?,or i missed the right one?,i downloaded it as the Elite software,so,how can i get the Rhvac calculations and sizing?,with it?,or this is a different software i should get also?,its...

hello russ again, ive got the software and its installed on my computer already now,but i didnt find anything with it about how to size the split air conditioner according to the area floor,all I've found is a duct work,and even didnt know where can i use it to calculate the actual heating or...

thank you for ur help russ,ill try to get that software,i took a look at the site,and watched the short videa there,and it sounds great to use,and have too many informations,and so helpful. thanks for ur time,and for the forum.

thanks russ for ur answer again, whats the name of the software u use? is it for the small units and the central air conditioners? i'd like really to do the right sizing for the air conditioner according to the actual cooling or heating loads,and there isn't a free software u use or know...

thank you for ur answer russ watters,but I've mentioned it wasnt the point sizing via hp,and yes i thought its the conversion from BTU to KW or hp,but it came different to their estimations,anyway,its not the point again,the point is: how can i get the corrsct size for split air conditioner by...

hello everybody, in fact,im asking for a help in a matter confused me alot,its about how can i select the right (split,mini split,portable,window,etc) air conditioner,which is not central air conditioner. im working now in a company and they size the air conditioner for the customer according...

well,for the evaporator as a heat exchanger,the two fluids are the air and the refrigerant,which exchange the heat between each other,to calculate the evaporating capacity"cooling capacity": Qref=c.c=Mref*delta h(enthalpy difference) where:Mref:refrigerant mass flow rate,h:the enthalpy at two...

ok,thank you ank_gl,im agree with u that the main difference which u can look at when ur required to choose a suitable gear box is the reduction ratio. just i had misunderstanding of wah28 problem,thought he wanted a single stage gear box,and he wanted to know which type of gears would be the...