Forum: Solar Power
09-02-14, 02:24 AM
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Replies: 15
Views: 19,861
At 240v and you size according to code (NEC in...
At 240v and you size according to code (NEC in the US) for safety and voltage drop for the given current level, it should be fine.
ANSI standards allow +/- 5% steady state voltage at the service...
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Forum: Tools
09-02-14, 02:20 AM
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Replies: 14
Views: 11,847
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Forum: Appliances & Gadgets
09-02-14, 02:06 AM
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Replies: 5
Views: 6,702
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Forum: Appliances & Gadgets
09-01-14, 10:47 PM
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Replies: 5
Views: 6,702
It will work perfectly with heat pump. Read...
It will work perfectly with heat pump. Read first, then post. I never advocated for kWh estimation of heat pump, but a duty cycle measurement in those applications.
It will accurately measure...
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Forum: Solar Power
09-01-14, 10:35 PM
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Replies: 15
Views: 19,861
What kind of A/C? Size and tonnage?
Code...
What kind of A/C? Size and tonnage?
Code permitting, I would go for doubly fed setup if your run is that long. The wire numbers are completely made up, but the setup on right is more desirable:...
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Forum: Tools
09-01-14, 09:54 PM
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Replies: 14
Views: 11,847
It would need to be protected from dust, just...
It would need to be protected from dust, just like timing on cars.
I would consider hydrostatic drive so you can modify the compressor speed. It also makes it substantially easier to start by...
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Forum: Appliances & Gadgets
09-01-14, 09:30 PM
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Replies: 5
Views: 6,702
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Forum: Appliances & Gadgets
09-01-14, 08:45 PM
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Replies: 11
Views: 12,248
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Forum: Tools
09-01-14, 08:30 PM
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Replies: 14
Views: 11,847
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Forum: Solar Power
09-01-14, 07:03 PM
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Replies: 15
Views: 19,861
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Forum: Appliances & Gadgets
09-01-14, 06:47 PM
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Replies: 18
Views: 11,056
It's a line pollution control to clean up the...
It's a line pollution control to clean up the pollution caused by highly polluting power electronics loads. LC filters are good. It would be the most effective combined with facility level...
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Forum: Appliances & Gadgets
09-01-14, 04:10 AM
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Replies: 18
Views: 11,056
Query for mejunkhound
Big, heavy and lossy in some applications, but I believe these words are used to discredit passive components as outdated to present power electronics as being all around better no compromise...
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Forum: Geothermal & Heat Pumps
08-31-14, 11:24 PM
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Replies: 51
Views: 54,410
And relay requires holding current and it's an...
And relay requires holding current and it's an added cost and complexity.
Does switching to two diode from bridge at low load reduce load as measured at primary side of distribution transformer...
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Forum: Geothermal & Heat Pumps
08-31-14, 10:37 PM
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Replies: 51
Views: 54,410
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Forum: Appliances & Gadgets
08-31-14, 10:09 PM
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Replies: 11
Views: 12,248
Don't forget the indirect losses. Dryer is...
Don't forget the indirect losses. Dryer is similar to a single vent portable A/C. There's been some laboratory testing done on portable ACs and many have been found to have a negative efficiency when...
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Forum: Geothermal & Heat Pumps
08-31-14, 08:10 PM
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Replies: 51
Views: 54,410
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Forum: Geothermal & Heat Pumps
08-31-14, 05:49 PM
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Replies: 51
Views: 54,410
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Forum: Geothermal & Heat Pumps
08-31-14, 08:36 AM
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Replies: 51
Views: 54,410
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Forum: Appliances & Gadgets
08-31-14, 07:57 AM
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Replies: 14
Views: 11,145
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Forum: Geothermal & Heat Pumps
08-30-14, 11:39 PM
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Replies: 51
Views: 54,410
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Forum: Appliances & Gadgets
08-30-14, 11:30 PM
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Replies: 14
Views: 11,145
Set point has to be hotter than utilization...
Set point has to be hotter than utilization temperature unless the design is such that water can be drawn without cold water going into it, because the added water will diffuse with the existing hot...
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Forum: Wind Power
08-30-14, 11:13 PM
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Replies: 7
Views: 16,767
What you're describing is a pneumatic machine....
What you're describing is a pneumatic machine. Industrial size compressors can get over 90% motor efficiency, but the kW power at shaft of pneumatic tools over kW work going into compressor is...
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Forum: Geothermal & Heat Pumps
08-30-14, 09:05 PM
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Replies: 51
Views: 54,410
But we're not talking about it in specific...
But we're not talking about it in specific end-user industry. Data centre would be so called medium voltage customer with customer owned distribution equipment.
Purpose specific centralized DC...
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Forum: Appliances & Gadgets
08-30-14, 05:39 PM
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Replies: 14
Views: 11,145
Well, 115-120F is pretty much the lower limit...
Well, 115-120F is pretty much the lower limit from practical sense so you have warm enough water for usage. Residential water heaters are designed for upper bound of 150F.
So, all that controller...
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Forum: Geothermal & Heat Pumps
08-30-14, 05:28 PM
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Replies: 51
Views: 54,410
I wasn't blaming them for that. They're not...
I wasn't blaming them for that. They're not "load". I am referring to electronic loads, like variable speed motor drives which is often called "inverter drive". You're thinking of the wrong inverter,...
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