Handbook of Energy Storage for Transmission or ... - W2agz.com

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Regenesys Electricity Storage Technology
Table 3
Parameters for Incremental Changes in Energy and Power Capability of Regenesys Plants
Base Projection
$/kWh
Incremental
$/kWh
Incremental
$/kW
First Commercial Plant 150 30 100
30 th Plant with 10 plants/year 80 20 50
According to the parameters given in Table 2, the cost of the 30 th of a kind Regenesys plant
based on a 100MWh/10MW design, but with an energy storage capacity 110MWh would be
only $200,000 more than the baseline plant. Similarly, a first commercial plant with capacity of
90MWh would be only $300,000 less than the 100MWh baseline plant. The reader may make
other calculations for plants having somewhat different energy specifications, according to the
formula given above and the parameters in Table 3, as desired.
Changes in power capability would also be projected to have relatively small impacts on the total
cost. For example, the cost of a first commercial Regenesys plant based on a 100MWh/10MW
design, but with a power capability of 15MW would be only $500,000 more than the baseline
plant. For the 30 th plant with 10 plants/year case, the cost of the 15MW option would be only
$250,000 more than the baseline. Clearly, these plants with higher power capability would have
a discharge time at the higher power that would be significantly less than the nominal discharge
time of 10 hours. Indeed, thermal and other effects might limit the time for which the higher
power could be sustained to an hour or so.
Estimated Benefits
Table 3 shows the estimated benefits for the use of an electricity storage technology with a
capability required for the specified application. These estimates are based on a review of
estimates made by other analysts, as shown in the references below the table. In part, the review
of benefits estimates was performed by Symons/EECI as part of a study on the “Second Use of
EV Batteries”. 5
5 “Technical and Economic Feasibility of Applying Used EV Batteries in Stationary Applications”, Report in
preparation (2002) for DOE Energy Storage Systems Program under Contract Number 20605 with Sandia National
Laboratories
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