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A variety of hydrogen storage technologies are being considered for vehicular applications, including: physical storage, chemical carriers, gas-on-solid adsorption, and metal hydrides. These techniques have been compared in terms of weight, volume, complexity, cost, dormancy, and safety.p,6] By (j,e criteria discussed in those references, compressed gas storage using carbon fiber composite pressure vessels wound onto metal or plastic liners has been identified as one of the best near-term technologies.

The development of lightweight composite storage tanks using polymeric bladders as the inflatable mandrel and integral liner has been partially performed under a program funded by the DOE, Office of Transportation Technologies, in conjunction with Ford Motor Company. Tanks fabricated using this technology have advanced the state-of-the-art in tank performance factors, while achieving the high cycle life capability of thick metal or polymeric liners. Since the liners are thin and lightweight, the weight and volume penalties associated with packaging tanks into multiple units is reduced. The performance factor of a bladder lined tank using lower strength/less expensive caibon fibers (such as T700S or Panex 33) can match the performance factor of similar tanks with thick liners using higher strength/more expensive carbon fiber (such as T1000G). This is important because tank cost is dominated by fiber cost and the fiber cost per tank for T1000G is currently a factor of three-four times that of T700S or Panex 33.

Vehicles using rechargeable batteries have limited range per charge (<200 miles) due to low specific energy as shown in figure 2. Vehicles using lightweight pressure vessels for the onboard storage of hydrogen, combined with lightweight primary fuel cells can have greater than 350 mile range, could be rapidly refueled by sources of high pressure hydrogen (when available), and will be compatible with home electrolysis units. Such systems will require a hydrogen infrastructure or procurement of home electrolysis unit. Vehicles using lightweight pressure vessels and lightweight regenerative fuel cells will have the features of primary fuel cells and a rechargeable specific energy that is greater than 400 Wh/kg. Such systems would be dual-fueled vehicles that can use the existing electrical infrastructure, can utilize hydrogen infrastructure for rapid refueling (when available), enable regenerative braking by electrolysis, enable power peaking by oxygen supercharging, and will be cost competitive with primary hydrogen fuel cell vehicles.

DIY Battery Repair

DIY Battery Repair

You can now recondition your old batteries at home and bring them back to 100 percent of their working condition. This guide will enable you to revive All NiCd batteries regardless of brand and battery volt. It will give you the required information on how to re-energize and revive your NiCd batteries through the RVD process, charging method and charging guidelines.

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