Recent content by packo

what is first step in designing exchanger? i've all process parameters,and i'm looking on net but can't find calculation and proces of designing exchanger in steps detailed explained,any help?

i need a recommendation about type of counter-flow shell&tube exchanger for ethylene ethylene parameters are (shell)- in 1bar,-96 deg.C out 1bar,30 deg.C (tube)-in 15bar 30deg.C out 15bar -40 deg.C all...

first tnx for all answers,the tank is vented,and i know pressure and level of ethylene in tank but i'm not sure you understood my problem,and problem is -what pressure of evaporation would be if 1.tank is full of liquid eth. 2.tank is half of liquid e...

it-s ok but i need to find some mathematical background of evaporation-pressure in tank,any helpful ideas ?if i find that in x time evaporate y kg of ethylene how to find resulting pressure of that gas ethylene?

i have tank with liquid(ethylene) on -103degC,on that temp liquid ethylene evaporate an we have gas phase of ethylene wich raise pressure in tank as evaporation continues,i'm trying to somehow connect level of liquid ethylene in tank with pressure that is created by evaporation of liquid,there...

one more-if i looking HTC for air (natural convection) ,i know it's in the range 5-100 W/m2K but how can i determine that exactly ?i need table or graph where HTC of air is connected with outside temperature

ethylene is stored in vertical tank

i still can't find heat transfer coefficient for ethylene,i just find for water and for liquids but in general,nothing specificaly,if you know HTC for something similar to liquid and gas of ethylene please help tnx!

i found coefficient for conductivity but i need heat transfer coefficient(W/m^2*K) from surface to liquid/gas ethylene can't find it please help

i forgot to mention,downloadable version of textbook

as you can read in my questions before:))i'm interested in heat transfer in tanks,vessels,double-walled tanks,heat transfered to liquid in tanks,.. i found and printed A Heat Transfer Textbook by John H. Lienhard IV and John H. Lienhard V. but i'm trying find something more specifical for my...

let's say we are taking only conduction into consideration

if i claculate heat transfer through insulation and all materials of tank,how can i calculate heat transfered to liquid in tank?,because tank is not full and there is some level of liquid in there and above that is empty space,for example air and heat coming from outside come from all area of...

tunalover surfaces in gap are paralel,vertical when i find exactly measure of gap i'll tell you,but for now maybe i just calculate transfer with conduction,and then add convection and radiation in the game

one more question if i have double tank with gap of nitrogen between tanks,sholud i separately calculate heat transfer through first tank with area of that tank,than through gap with area of gap,than second tank with area of second t.,and then sum all,or calculate with some mean measure of area...