Compressor question...... ouch its HOT!!

Ct. Strangelove · 08-26-2002, 07:33 PM

I just bought a mini-fridge to hack apart, but the compessor is running unbelievably hot. I can keep my hand on it for more than a few seconds.

I know that mini-fridges have "built in" condensor, hence why the top and sides are pretty warm.

Why is the compressor running that hot!?

Is it because the built in condensor is not removing the heat fast enough and its just looping back in to the compressor?

o yeah, it has only been running literaly 10 minutes. (I just got it).
is it just burning in? I don't think so. but i am i newB at phasechange. (a little)

thx

aenigma · 08-26-2002, 07:42 PM

Hmmm,put a fan on it and see if that doesnt cool it quite a bit.
BTW I dont think mini fridges work too great to cool anything.

|PuNiSh3R| · 08-26-2002, 07:52 PM

GET RID OF IT! TAKE IT BACK BEFORE YOU DESTROY IT! MINI FRIGES SUCK ASS FOR PHASE CHANGE! TRUST ME! I HAVE BEEN THERE! IT'S A WASTE OF MONEY! TAKE IT FROM ME MAN! I PUT SO MUCH F'IN MONEY AND TIME INTO IT!!! NOT WORTH IT!!!!!!!

Ct. Strangelove · 08-26-2002, 08:15 PM

ok, will do. shutting it down now. I might go the dehumidifer approach. no scracth that I WILL go that way.

thanks alot!

maskedgeek · 08-26-2002, 09:11 PM

think about the dehumidifier thing, they pull like 700 watts.. thats pretty much overkill... just something to think about... maby find a smaller one? like 300 watts or something? im not exactly sure what it should be but im guessing 300....

aenigma · 08-26-2002, 09:19 PM

Quote:

Originally posted by maskedgeek
think about the dehumidifier thing, they pull like 700 watts.. thats pretty much overkill... just something to think about... maby find a smaller one? like 300 watts or something? im not exactly sure what it should be but im guessing 300....

No...
They arent overkill at all....

maskedgeek · 08-26-2002, 09:27 PM

are you sure? 700 watts is a lot.... i know a few peeps are using them... but 1hp is is somewere between 500 and 700 watts or soemthing... most people use 1/5 or around that compressors rite???

bowman1964 · 08-26-2002, 10:04 PM

watts rating on a humidifier means little to nothing.i can take one compressor and rate it at 500,600,700 watts .depending on the condensor and evaperator size.
a humidifier is rated with all 3 parts combined.you need to look at the hp load of the comperssor and voltage.for -40 degree temps 1/4 compresor is what you need. a 1/4 hp compressor does not mean it will run at that hp while it running.only when it needs the full load does it runn at 1/4hp.so that 1/4hp compressor only works like a 1/8 or so as the load is needed.so look for hp power ratting if you can.

aenigma · 08-26-2002, 10:22 PM

EXACTLY!
That is just a wattage measurement.Just because it is 700 watts doesnt mean it is 1HP.Just draws alot of wattage since it has so much refrigerant to keep the evap temp low even with hot condenser air blowing on it.

BTW you probably want at least a 1/4HP compressor.
I use a dual staged system with a 1HP compressor and a 3/4HP.
That is just a rating though.The 1 HP was a 13,500BTU a/c unit.

Since I have a 13,500btu compressor and a 8000btu it should be 21,500btu.But in my application it isnt going to be removing that many btu's,I dont have that much refrigerant in it.So it will be removing as much btu's as I need at the lowest possible temp.So my system charged the way it is may only handle a few thousand btu....

Much better to rate by BTU's than watts the compressor takes or HP rating.

Ok enough babbling

bowman1964 · 08-26-2002, 10:26 PM

aenigma good to see you buddy.i am sorry i have been busy .but thanks for the backup.

aenigma · 08-26-2002, 10:32 PM

Quote:

Originally posted by bowman1964
aenigma good to see you buddy.i am sorry i have been busy .but thanks for the backup.

Good to see you too
I lost my motherboard,guess it didnt like the mineral oil

So I dont have msn going right now on this computer,I will start it though....

maskedgeek · 08-27-2002, 01:22 AM

ok thanx for correcting me as i really dont know exactly what im talking about when it comes to phaze change, when someone said something about them being 700watts i asumed it was the compressor not the whole system...

bowman1964 · 08-27-2002, 10:49 AM

NO PROBLEM maskedgeek WE ALL HAVE TOO LEARN ONE WAY OR ANOTHER.

Heavy_Equipment · 09-01-2002, 12:53 AM

Either way, heat is definately a by-product here.

I have a thermometer mounted on the front grill of my dehumidifier, to measure the exhaust air temp.

When I first fire it up, from room temp, the exhaust is in the 45-50 C (112-120 F) range. Guaranteed to be hand burning hot on the compressor by my calculations, as I've never felt the urge to touch it.

After the system has stabilized, the exhaust stays pretty constant near 37 C.

These numbers were experienced at 28C ambient.

08-26-2002, 08:15 PM	#4
Ct. Strangelove Cooling Neophyte Join Date: Aug 2002 Location: Confusion Posts: 5	ok, will do. shutting it down now. I might go the dehumidifer approach. no scracth that I WILL go that way. thanks alot! __________________ "Ignorance is slavery" We live in a Capitalistic Socialism. Or you could just say America.

08-26-2002, 10:04 PM	#8
bowman1964 Cooling Savant Join Date: Jul 2002 Location: virginia usa Posts: 126	watts rating on a humidifier means little to nothing.i can take one compressor and rate it at 500,600,700 watts .depending on the condensor and evaperator size. a humidifier is rated with all 3 parts combined.you need to look at the hp load of the comperssor and voltage.for -40 degree temps 1/4 compresor is what you need. a 1/4 hp compressor does not mean it will run at that hp while it running.only when it needs the full load does it runn at 1/4hp.so that 1/4hp compressor only works like a 1/8 or so as the load is needed.so look for hp power ratting if you can. __________________ xp2800barton@2712 226x12 dual bank 2x256 twinmos pc3200 8RDA epox full mods.vdd,vdimm,vcore. custom r502 cooled unit.CPU running @-18C GPU -21C Chipset -20c only one like it.in one case. custom r502 cooling unit 3D2001SE 21315 3DMARK03 6659

08-26-2002, 10:22 PM	#9
aenigma Immature Title Goes Here Join Date: Aug 2002 Location: Washington Posts: 81	EXACTLY! That is just a wattage measurement.Just because it is 700 watts doesnt mean it is 1HP.Just draws alot of wattage since it has so much refrigerant to keep the evap temp low even with hot condenser air blowing on it. BTW you probably want at least a 1/4HP compressor. I use a dual staged system with a 1HP compressor and a 3/4HP. That is just a rating though.The 1 HP was a 13,500BTU a/c unit. Since I have a 13,500btu compressor and a 8000btu it should be 21,500btu.But in my application it isnt going to be removing that many btu's,I dont have that much refrigerant in it.So it will be removing as much btu's as I need at the lowest possible temp.So my system charged the way it is may only handle a few thousand btu.... Much better to rate by BTU's than watts the compressor takes or HP rating. Ok enough babbling Last edited by aenigma; 08-26-2002 at 10:29 PM.

08-26-2002, 10:26 PM	#10
bowman1964 Cooling Savant Join Date: Jul 2002 Location: virginia usa Posts: 126	aenigma good to see you buddy.i am sorry i have been busy .but thanks for the backup. __________________ xp2800barton@2712 226x12 dual bank 2x256 twinmos pc3200 8RDA epox full mods.vdd,vdimm,vcore. custom r502 cooled unit.CPU running @-18C GPU -21C Chipset -20c only one like it.in one case. custom r502 cooling unit 3D2001SE 21315 3DMARK03 6659

08-27-2002, 10:49 AM	#13
bowman1964 Cooling Savant Join Date: Jul 2002 Location: virginia usa Posts: 126	NO PROBLEM maskedgeek WE ALL HAVE TOO LEARN ONE WAY OR ANOTHER. __________________ xp2800barton@2712 226x12 dual bank 2x256 twinmos pc3200 8RDA epox full mods.vdd,vdimm,vcore. custom r502 cooled unit.CPU running @-18C GPU -21C Chipset -20c only one like it.in one case. custom r502 cooling unit 3D2001SE 21315 3DMARK03 6659

08-26-2002, 07:42 PM	#2
aenigma Immature Title Goes Here Join Date: Aug 2002 Location: Washington Posts: 81	Hmmm,put a fan on it and see if that doesnt cool it quite a bit. BTW I dont think mini fridges work too great to cool anything.

08-26-2002, 07:52 PM	#3
\|PuNiSh3R\| Foo's Been Banned Join Date: May 2002 Location: Pennsyltucky Posts: 255	GET RID OF IT! TAKE IT BACK BEFORE YOU DESTROY IT! MINI FRIGES SUCK ASS FOR PHASE CHANGE! TRUST ME! I HAVE BEEN THERE! IT'S A WASTE OF MONEY! TAKE IT FROM ME MAN! I PUT SO MUCH F'IN MONEY AND TIME INTO IT!!! NOT WORTH IT!!!!!!!

08-26-2002, 09:11 PM	#5
maskedgeek Registered User Join Date: May 2002 Location: poop Posts: 145	think about the dehumidifier thing, they pull like 700 watts.. thats pretty much overkill... just something to think about... maby find a smaller one? like 300 watts or something? im not exactly sure what it should be but im guessing 300....

08-26-2002, 09:27 PM	#7
maskedgeek Registered User Join Date: May 2002 Location: poop Posts: 145	are you sure? 700 watts is a lot.... i know a few peeps are using them... but 1hp is is somewere between 500 and 700 watts or soemthing... most people use 1/5 or around that compressors rite???

08-27-2002, 01:22 AM	#12
maskedgeek Registered User Join Date: May 2002 Location: poop Posts: 145	ok thanx for correcting me as i really dont know exactly what im talking about when it comes to phaze change, when someone said something about them being 700watts i asumed it was the compressor not the whole system...

09-01-2002, 12:53 AM	#14
Heavy_Equipment Cooling Savant Join Date: Mar 2002 Location: Newmarket, Ontario, Canada Posts: 282	Either way, heat is definately a by-product here. I have a thermometer mounted on the front grill of my dehumidifier, to measure the exhaust air temp. When I first fire it up, from room temp, the exhaust is in the 45-50 C (112-120 F) range. Guaranteed to be hand burning hot on the compressor by my calculations, as I've never felt the urge to touch it. After the system has stabilized, the exhaust stays pretty constant near 37 C. These numbers were experienced at 28C ambient.

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