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what is the Indoor Design Conditions for the Switch gear room? any help/suggestion will be greatly appriciated

let me clear this digital speed governor simply is a digital control panel with integrated voltage regulator, this panel used to control and regulate the output of the turbine or generator. http://www.ucmr.com/galerii/imagepages/image-cap23.html

what type of fire suppression system can be used to protect electronic speed governeor. any help/advice it would be greatly appreciated.

this another star

Can anybody comment on the pros and cons of using open coil type & finned tubular heater. thank you for any input

stookeyfpe: you are right Class A can be used also for electric applications but this is only if the electrical supply is isolated (shutdown) during suppression. So, if you have an application where the electrical supply is live you have to consider class C hazard. thanks for your help

I learned from the internet that class A is used for surface fire and Class C for electrical fires. for my curiosity to learn more I would like to know the design concentration for Class C fire? any help is appreciated..

What is the design concentration for Class C in FM-200 system ? saftey factor?

most Manufacturers set SST from 20-50*F

Imok2: thanks for your input TXiceman: the reason for my concern is to increase the compressor effficincy, The higher the suction gas superheat, the lower the gas density and therefore, the lower the compressor mass flow rate. most Manufacturers set SST from 20-50*C , is there any problem in...

Forgive me for my ingnorance, I have what may be a elementary question regarding DX cooling system. Q.What would be the highest acceptable saturated suction Temprature(SST)in R-22 DX ? how to achive higher SST in the system ? Thanks in advance for any input.

briand2: I agree with you that when fan is selected to suit the system the air will flow to the latest part of the duct whatever the velocity is, but my concern is the terminal or (neck) velocity near the diffuser. I beleve there are some limitations for the neck velocity to avoid noise...

ChrisConley: thank you for your input. regarding the min friction rate, I am confuised with your reply. what I understand that air flow should be with sufficiant velocity to conevy air through the duct . if firiction rate is too low, the air flow will not be distrbuted in the zone propelry due...

how many supply branch ducts can be taken off of the main duct before reducing the main duct size? can I size the main duct at 0.1 in wg/100 ft, then size the branch duct for noise sensitive room at 0.05 in wg/100 ft. what is the lowest friction rate that I should not select?

in my opinon in winter, people wear heavy clothes. with design room temp. 19~21 they will feel more comfortable.

quark: you mentioned one of the advantages of scroll compressor is that "it Can handle liquid to some extent (atleast there won't be any damage)" could you pls. explain this? MintJulep: thank you for your interest,I am currently taking quotes to have air conditioning installed in new office...

What are the pros and cons on Scroll Vs Reciprocating Compressors.

in case if cooling is required in restroom, how to maintaine -ve pressure and suppling cooling at the same time with out effecting the comfort requirment. is there any guides? regarding the required exhaust cfm for wash basin/lavatory, for the reason of removal of humidity is there any fixed...

As per Mechanical Code the for restrooms,the level of exhaust typically is 50 cfm per water closet or 2 cfm per square foot. What is exhaust (cfm) of wash basin/lavatory? In case if cooling is required, how to size the supply cfm of the restroom ?

To design air duct by Equal Friction Method, the friction factor of 0.1 in wg. Is used as a rule of thumb for all supply duct sizes. And 0.8 is used for sizing the return duct. When energy cost is high and installed ductwork cost is low, the low friction rate design is more economical. My...