heat conduction

rogergolf66 · 05/27/2007, 07:18 AM

does anybody know how much heat in water temp a powerhead will add to a tank. does if have to do with the watts of the power head? how do you know. I am having trouble keeping my temp down and I have a chiller. I am thinking about adding more inlets from the main pump and removing the power heads that are there now.

does anybody know how to figure out how much heat a powerhead gives out. or even how much a pump will give out. Is it with how many watts a pump uses?

Thank You
Roger

datablitz · 05/27/2007, 07:36 AM

you could turn one PH off at a time, and see if there is a significant drop in tempature.

what size tank/lighting/canopy are you having problems with? what is the normal room temp?

rogergolf66 · 05/27/2007, 09:33 AM

thanks but that was not my question. I have pulled the powerheads and the tank is staying with in the range I want 79 degress. I was wondering If anybody know of a study on how much different powerheads raise tank temp? or how to calculate it on my own. by powerhead wattage?

room temp is 74 degrees 24 hours a day.
tank is 75 gallon
Metal halide lighting which I know is a problem. but the tank will temp even rises over 82 degress at 2 in the morning and no lights have been on for5 yours and the chiller cools the system it just takes to long the chiller is working 6 hours a day with the power heads on.

I guess this is still my origanal question I bought 3 new powerheads that I put in a different tank then push 1200gph and only use 8.5watts. I was hoping some one would tell me that the wattage is what raises the water temp, but not if it is not true lol.

no canopy on this tank I removed it 6 months ago to help lower temp it helped but still not low enough.

as far as turning one powerhead on at a time maybe.

thanks

Roger

datablitz · 05/27/2007, 09:53 AM

maybe your return pump is creating a lot of heat? that is strange for you to have that much heat with out a canopy, and the room being cool. how far are the lights above the water?

rogergolf66 · 05/27/2007, 10:12 AM

about 5 inches My return pump is and external inline pump It shouldn't .

Thanks Roger

datablitz · 05/27/2007, 10:53 AM

you might see some improvment if you raise your lights up higher, or place a small fan between the lights and the water.

rogergolf66 · 05/27/2007, 05:07 PM

I tryed the fans no help

I will raise the lights higher in the new setup

Zann · 05/27/2007, 05:34 PM

i have a aquapod 24 i put a mj 1200 in it didnt have the lights on because im cooking them
well the temp got up to 84 with the mj 1200 and the stock pump that came with it
i took the stock pump out and replaced it with the mj 1200 i had in the tank and i have a 350 magnum also for water polishing and more flow.
well to get to it my temp droped 9 degrees .

rogergolf66 · 05/27/2007, 07:54 PM

well I have a new pump that I am putting on the new system so hopefully it will help If not I have plains in place to add and AC vent right over the tank room.

RichConley · 05/27/2007, 08:54 PM

powerheads (or any submersed pump) will add heat equal to the wattage they draw.

All energy used is either converted to A) Heat, or B)Kinetic energy. All Kinetic energy is converted to heat via friction. (water slowing down)

So, a 20w powerhead creates 20w of heat, whether its an eheim, or a genx.

rogergolf66 · 05/27/2007, 09:44 PM

well ok if it is created by friction also if I have and 8W power head it will create 8W of heat but lets say it pumps 1200GPH the friction from the water movement hitting the glass and the rocks does that friction create heat to, or just the friction from the parts of the pump rubbing together?

Thanks Roger

rogergolf66 · 05/27/2007, 09:46 PM

also does anybody know of any tests say 50Watts in a 50gallon tank raise the temp 2 degess or anything like that?

05/27/2007, 07:18 AM	#1
rogergolf66 im an addict lol Join Date: Jul 2006 Location: Land o lakes, FLorida Posts: 12,930	heat conduction does anybody know how much heat in water temp a powerhead will add to a tank. does if have to do with the watts of the power head? how do you know. I am having trouble keeping my temp down and I have a chiller. I am thinking about adding more inlets from the main pump and removing the power heads that are there now. does anybody know how to figure out how much heat a powerhead gives out. or even how much a pump will give out. Is it with how many watts a pump uses? Thank You Roger

05/27/2007, 09:33 AM	#3
rogergolf66 im an addict lol Join Date: Jul 2006 Location: Land o lakes, FLorida Posts: 12,930	thanks but that was not my question. I have pulled the powerheads and the tank is staying with in the range I want 79 degress. I was wondering If anybody know of a study on how much different powerheads raise tank temp? or how to calculate it on my own. by powerhead wattage? room temp is 74 degrees 24 hours a day. tank is 75 gallon Metal halide lighting which I know is a problem. but the tank will temp even rises over 82 degress at 2 in the morning and no lights have been on for5 yours and the chiller cools the system it just takes to long the chiller is working 6 hours a day with the power heads on. I guess this is still my origanal question I bought 3 new powerheads that I put in a different tank then push 1200gph and only use 8.5watts. I was hoping some one would tell me that the wattage is what raises the water temp, but not if it is not true lol. no canopy on this tank I removed it 6 months ago to help lower temp it helped but still not low enough. as far as turning one powerhead on at a time maybe. thanks Roger __________________ Goal levels: salinity 35ppt, temp 78-79, alk 8-9, cal 430-450, mag 1310-1400 po4 .03, no3 1-3 Current Tank Info: System 1... 100 gal Zoa tank I built, 30 gal Ric Yuma shroom tank, 30 gal mix tank my sons,40 gal softie tank, 40 gal nem tank, two 40 gal LPS tank. System 2... 240 gal SPS display attached 100 gal frag SPS only tank.

05/27/2007, 10:12 AM	#5
rogergolf66 im an addict lol Join Date: Jul 2006 Location: Land o lakes, FLorida Posts: 12,930	about 5 inches My return pump is and external inline pump It shouldn't . Thanks Roger __________________ Goal levels: salinity 35ppt, temp 78-79, alk 8-9, cal 430-450, mag 1310-1400 po4 .03, no3 1-3 Current Tank Info: System 1... 100 gal Zoa tank I built, 30 gal Ric Yuma shroom tank, 30 gal mix tank my sons,40 gal softie tank, 40 gal nem tank, two 40 gal LPS tank. System 2... 240 gal SPS display attached 100 gal frag SPS only tank.

05/27/2007, 05:07 PM	#7
rogergolf66 im an addict lol Join Date: Jul 2006 Location: Land o lakes, FLorida Posts: 12,930	I tryed the fans no help I will raise the lights higher in the new setup __________________ Goal levels: salinity 35ppt, temp 78-79, alk 8-9, cal 430-450, mag 1310-1400 po4 .03, no3 1-3 Current Tank Info: System 1... 100 gal Zoa tank I built, 30 gal Ric Yuma shroom tank, 30 gal mix tank my sons,40 gal softie tank, 40 gal nem tank, two 40 gal LPS tank. System 2... 240 gal SPS display attached 100 gal frag SPS only tank.

05/27/2007, 07:54 PM	#9
rogergolf66 im an addict lol Join Date: Jul 2006 Location: Land o lakes, FLorida Posts: 12,930	well I have a new pump that I am putting on the new system so hopefully it will help If not I have plains in place to add and AC vent right over the tank room. __________________ Goal levels: salinity 35ppt, temp 78-79, alk 8-9, cal 430-450, mag 1310-1400 po4 .03, no3 1-3 Current Tank Info: System 1... 100 gal Zoa tank I built, 30 gal Ric Yuma shroom tank, 30 gal mix tank my sons,40 gal softie tank, 40 gal nem tank, two 40 gal LPS tank. System 2... 240 gal SPS display attached 100 gal frag SPS only tank.

05/27/2007, 07:36 AM	#2
datablitz Moved On Join Date: Dec 2006 Location: Blacklick, Ohio Posts: 347	you could turn one PH off at a time, and see if there is a significant drop in tempature. what size tank/lighting/canopy are you having problems with? what is the normal room temp?

05/27/2007, 09:53 AM	#4
datablitz Moved On Join Date: Dec 2006 Location: Blacklick, Ohio Posts: 347	maybe your return pump is creating a lot of heat? that is strange for you to have that much heat with out a canopy, and the room being cool. how far are the lights above the water?

05/27/2007, 10:53 AM	#6
datablitz Moved On Join Date: Dec 2006 Location: Blacklick, Ohio Posts: 347	you might see some improvment if you raise your lights up higher, or place a small fan between the lights and the water.

05/27/2007, 05:34 PM	#8
Zann Registered Member Join Date: Mar 2007 Location: Southaven Ms Posts: 569	i have a aquapod 24 i put a mj 1200 in it didnt have the lights on because im cooking them well the temp got up to 84 with the mj 1200 and the stock pump that came with it i took the stock pump out and replaced it with the mj 1200 i had in the tank and i have a 350 magnum also for water polishing and more flow. well to get to it my temp droped 9 degrees .

05/27/2007, 08:54 PM	#10
RichConley Registered Member Join Date: Sep 2004 Location: Bostonian in Chicago going to DC Posts: 9,908	powerheads (or any submersed pump) will add heat equal to the wattage they draw. All energy used is either converted to A) Heat, or B)Kinetic energy. All Kinetic energy is converted to heat via friction. (water slowing down) So, a 20w powerhead creates 20w of heat, whether its an eheim, or a genx. __________________ NO TANKS!!!

05/27/2007, 09:44 PM	#11
rogergolf66 im an addict lol Join Date: Jul 2006 Location: Land o lakes, FLorida Posts: 12,930	well ok if it is created by friction also if I have and 8W power head it will create 8W of heat but lets say it pumps 1200GPH the friction from the water movement hitting the glass and the rocks does that friction create heat to, or just the friction from the parts of the pump rubbing together? Thanks Roger __________________ Goal levels: salinity 35ppt, temp 78-79, alk 8-9, cal 430-450, mag 1310-1400 po4 .03, no3 1-3 Current Tank Info: System 1... 100 gal Zoa tank I built, 30 gal Ric Yuma shroom tank, 30 gal mix tank my sons,40 gal softie tank, 40 gal nem tank, two 40 gal LPS tank. System 2... 240 gal SPS display attached 100 gal frag SPS only tank.

05/27/2007, 09:46 PM	#12
rogergolf66 im an addict lol Join Date: Jul 2006 Location: Land o lakes, FLorida Posts: 12,930	also does anybody know of any tests say 50Watts in a 50gallon tank raise the temp 2 degess or anything like that? __________________ Goal levels: salinity 35ppt, temp 78-79, alk 8-9, cal 430-450, mag 1310-1400 po4 .03, no3 1-3 Current Tank Info: System 1... 100 gal Zoa tank I built, 30 gal Ric Yuma shroom tank, 30 gal mix tank my sons,40 gal softie tank, 40 gal nem tank, two 40 gal LPS tank. System 2... 240 gal SPS display attached 100 gal frag SPS only tank.