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What could happen if a semi hermetic compressor is operated with the suction service valve backseated and the discharge valve frontseated?
Wiki User
∙ 12y ago
the compressor capacity will increase
Wiki User
∙ 12y ago
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What is the Difference between Si and Ge diodes?
The significant operational difference between a Si diode and a Ge diode is that Si diodes have a knee voltage of 0.7V needed to allow current flow and Ge diodes have an operational voltage of 0.3V to allow current flow.
Why silicon is preferred over germanium in the fabrication of integrated circuits?
The invention of the planar process by which most IC devices are fabricated relies on the gas phase diffusion of dopants to produce N-type and P-type regions, but also on the ability of silicon dioxide to mask these diffusion processes and passivate the chip surface eliminating the need for hermetic packaging. Silicon is unique in its ability to be oxidized to produce a stable insulating coating. Germanium dioxide is crumbly and water soluble, making it impossible to use in this process. While the first IC made used germanium, it had to be handwired which would have made them prohibitively expensive to produce and much larger than even the early silicon ICs.
What is the function of an integrated circuit housing?
The housing has several functions:protect the tiny fragile silicon chip from damagehold the pins stationary, so they do not flop about and short togetherprovide a form factor large enough for either manual or machine parts placement on printed circuit boardsbe able to tolerate thermal stresses during operation without having a failure (some early leadless chip carrier housings failed this function as thermal stresses sheared all the solder joints and permitted the devices to fall off the board)if its a metal or glass housing, maintain a hermetic seal so that water vapor and other outside gasses cannot enter and cause contamination or corrosionin high power devices, provide a good path for thermal conduction away from the silicon chip and the means to attach a heatsinketc.
Servicing a stuck hermetic compressor?
To service a stuck Hermetic compressor,repair the start components of the air conditioning compressors.
Why Hermetic compressor motor manufactured from special material?
Hermetic manufactured from special materials because Hermetic compressor motor materials must be compatible with the refrigerant and oil circulating in the system.
How can a hermetic compressor be tested for efficiency?
There are a few ways to test a hermetic compressor for efficiency.Compressor Vacuum TestClosed-Loop Compressor Running Bench TestClosed-Loop Compressor Running Field TestCompressor Running Test in the System
What is difference between Hermetic Rotary Compressor?
this tool is not available
Why you cant have a centrifugal switch in a hermetic motor?
The hermetic compressor cannot use a centrifugal switch like an open motor because it will disrupt the start winding. Hermetic compressors work through insulated motor terminals, and not in the open.
Why is the hermetic compressor motor manufactured from special material?
because the hermatic compressor motor must be compatible with the refrigerant and oil circulating in the system.
Why hermetic compressor color black?
because black body absorbs/emit maximum heat
What are the parts of refrigeration compressor?
The parts of a hermetic (sealed) reciprocating compressor is as follows; motor, crankshaft, bearings, valves, and pressure relief valve and piston(s). there are other smaller parts that can be named but these are the main players. The hermetic scroll compressor is a little different than the reciprocating compressor because it uses an orbiting scroll and a stationary scroll to compress the refrigerant instead of pistons. This is why a scroll compressor cannot run "backwards". The scroll compressor also has an oil pick up tube which differs from a reciprocating compressor. Now a "semi-hermetic" compressor is build like a small engine. It has an oil pump, reed valve plate, unloaders, pistons, bearings, etc. A screw compressor is in a class all to itself.
How can a compressor be tested for efficiency?
There are a few ways to test a hermetic compressor for efficiency.Compressor Vacuum TestClosed-Loop Compressor Running Bench TestClosed-Loop Compressor Running Field TestCompressor Running Test in the System
Can you rebuild a compressor for home AC unit?
No the compressors in residential condensing units are called hermetic compressors and have to be rebuilt by cutting open the compressor shell, then rebuild the compressor and then weld the shell shut. Buy a new compressor or condensing unit.
Which is best Rotary compressor or reciprocating compressor?
Receip or Piston type compressor are used for large duty cycle work (A/c or other equipments), energy hungry but last longer (Heavy Duty). Where as rotary compressor are energy efficient with higher ( Energy Efficiency Ratio) but lower duty cycle and shorter life. Selection of compressor are based on the nature of application. Normally, for room A/Cs with capacity less than 3 ton, most companies offer rotary compressor due to it's EER and less duty cycle. For heavy duty A/Cs, recip or piston compressor best suited.
What terminals combinations would show an open circuit if the internal overload device in a hermetic compressor should open due to excessive heat?
common to start and common to run
