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Thanks all and sorry for the delay I was away for almost a week. The situation is simple. The application is a class room of 35 students. The room is fitted with with a window AC which is having no provision to feed in fresh air. I want to provide 100% fresh air into the room through suitable...

I have a room having a window air conditioner and a separate axial fan throwing in 100% fresh air When I draw the plot in a psychrometric chart, in order to arrive at delta H from the plot, should I consider the enthalpy values (H1 and H@)as those between OA conditions and coil ADP or enthalpy...

Quark No doubt we will be using the forbes o2 analyser. I still need the various equations for dry flue gas loss etc. I have a doubt in the excess air qty equation.Pl forward me the equations if it is not a bother. My Id is grn_blr@yahoo.co.in thanks in advance grnblr

Actually there is a direct method of calculating efficiency based on heat output divided by heat input. The heat output is calculated by the formula .. steam flow x (steam enthalpy - feedwater enthalpy) The heat input = fuel firing rate x gross calorific value. but I am interested in the...

Can anyone guide me to any website where I can get the complete details including formula for calculating the efficiency (by indirect method) of furnace oil fired steam boilers. Thankx in advance

Thanks metengr the details will help grnblr

Could anyone tell me how to select the corrosion allowance required to be assumed while designing a vessel, in particular for a high pressure ammonia storage receiver used in a refrigeration plant. Pl help. Thanks in advance grnblr

Dear friends, I would like some guidelines for finding out the cfm calculation for a fan which is to mantain positive pressure (5mm water column) in a room having about 50 sqmt area. the room has one door 1.2mt x2.1mt high. The height of the room is 4.5 mt. The door will be opened about 10...

Dear mdonner, Both carrier and trane are not parting any info for free. Any site where we get free material ?. Thanks anyway grnblr

Dear Pmover, could u get the carrier systems design manual. I too need a copy can u help reg grnblr

Dear friends Is it possible to access carrier corporation or trane's HVAC design manual or training materials from any web site. Pl help grnblr

Hi, Can anyone guide me as to where I can get free (not demo) software or spreadsheets for HVAC heat load calculations, including selection of compressors, AHU sizing,duct sizing and also standards/charts/guidelines for FA change etc. Also heat load calc incl compressor (and other...

Dear friends, I have 3 questions to ask Q-1 I have a requirement for a milk chiller of following details V1 = milk flow 20000lph t1 = incoming temp of milk 35 deg C t2 = outgoing temp of milk 4 deg C t3 = incoming temp of chilled water 1.5 deg C V2 = chilled water flow 60000 lph t4...

I would like to know how, for a 45 mt chimney stack made up of 5 sections, the total Bending moment to wind loads, with section considered at the base of each stack piece is calculated. I only know that it is the algebric sum of all moments produced by the wind forces on one side of the section...