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  • CR4 - Thread: Solar Power System for Housing
    If rainwater were channeled or pumped into a cistern via a 12 volt motorhome style pump and then pumped into the... ...gravity and a make-up pressure pump for toilets, washing, etc., energy requirements for water use could be kept low .
  • CR4 - Thread: Solar Pre-heated Water - Need Help Getting Water To Flow
    Once you lower the water pressure to the holding tanks at the well motor pressure switch... ...keep them full, you could use a DC water supply pump from a motor home... ...supplied from a single 12volt marine trolling battery (deep...
  • CR4 - Thread: Low Pressure Air (1 to 3 psi) to Run Hydroponic Ebb and Flow Systems
    Hi, Lynn, one problem is that there do not seem to be many low pressure air pumps that are run from a solar panel directly. I know that 12 volt bilge pumps are pretty immune to thermal overload when not running because they are in water and the water takes away the heat but probably air pumps would be more prone to overheating when there is power...
  • COMPACT HOT-WATER PRESSURE WASHER
    It's engineered to produce the same amount of water flow as other tri-plunger pumps but at 10% lower rpm, extending its life. The two models of the self-contained, compact, SUV pressure washer feature 6- and 7-hp Subaru engines coupled with Landa’s proprietary Super-Duty Regulator to produce a constant supply of 12 - volt DC power for the diesel-fired burner used to...
  • COMPACT HOT-WATER PRESSURE WASHER
    It's engineered to produce the same amount of water flow as other tri-plunger pumps but at 10% lower rpm, extending its life.

    The two models of the self-contained, compact, SUV pressure washer feature 6- and 7-hp Subaru engines coupled with Landa’s proprietary Super-Duty Regulator to produce a constant supply of 12 - volt DC power for the diesel-fired burner used...

  • Astris Energi delivers portable fuel cell system to Czech military
    A conditioning circuit, with a pressure reducer and valves, delivers low pressure hydrogen to two fuel cell stacks with 12 volt DC outputs. An air pump and dry CO2 scrubber condition the ambient air for delivery to the stacks. ...electrolyte circulated through the stacks by a small pump provides convenient means for water and heat management...
  • Astris Energi delivers portable fuel cell system to Czech military
    A conditioning circuit, with a pressure reducer and valves, delivers low pressure hydrogen to two fuel cell stacks with 12 volt DC outputs. An air pump and dry CO2 scrubber condition the ambient air for delivery to the stacks. ...electrolyte circulated through the stacks by a small pump provides convenient means for water and heat management...
  • CR4 - Thread: Domestic Water Heater in Main Water Supply
    They run on 120VAC but draw so little current that they could easily run off a small inverter attached to a 12 volt storage battery that can be kept charged by any number of available power sources. They are centrifugal types which means that they can pump reliably at very low flow rates well below their rated flow rates. Also, unlike many other types of small pumps with plastic components these pumps are designed to operate at hot water temperatures near the boiling point particularly if there is sufficient static pressure in the water (as with a domestic water supply) to...
  • A Controllable Water Cooled Charge Air Cooler (WCCAC) for Diesel Trucks
    The water -cooled charge air cooling system substantially differs from other liquid-air systems by the nature of the low temperature cooling loop. The WCCAC coolant circuit is entirely independent of the jacket water circuit, and is cooled by a variable speed 12 volt electric water pump which can automatically modulate the coolant flow rate to control the IMT to the desired level. ...relative to an air-air CAC, has advantages in packaging, durability, air-side pressure drop, and intake...
  • New Tools and Techniques for the Underwater Inspection of Waterfront Structures
    The diesel engine drives the hydraulic oil pump and operates the alternator/regulator assembly which provides a 12 volt negative ground electrical system. Safety switches are installed at various locations to detect high head temperatures, broken belts, low inlet water pressure , high hydraulic system temperature, .