Round-Trip-Effizienz des Druckluft-Energiespeichersystems
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What is round trip efficiency?
2.2.1. Round trip efficiency The round trip efficiency is an important indicator to the system performance of the LAES and is defined as the power output in the discharging cycle divided by the power input in the charging cycle.
Does a higher PC increase round trip efficiency?
At a Pc higher than 13 MPa, the change to the round trip efficiency becomes less due to a change in the specific heat capacity of air. Fig. 7 (a) indicates that the round trip efficiency of the hybrid LAES system is some 9–12% higher than that of the baseline LAES under the conditions of this study. Fig. 7.
What affects the round trip efficiency of the baseline LAEs?
The round trip efficiency of the baseline LAES is affected by the stages of expansion as shown in Fig. 6 (b); when the stages of expansion increase from 3 to 5, the round trip efficiency increases by 5.4% and 7.2% for the charging pressure at 14 and 10 MPa, respectively.
Does GES system have a round-trip efficiency?
Accordingly, the following study presents the first assessment of the round-trip efficiency (RTE) of GES system using a novel multi-domain simulation tool. The developed tool combines analytical and numerical models to evaluate the different loss mechanisms that occur in GES system.
Does heat of compression improve round trip efficiency?
The above brief review shows that very little has been done on the effective utilization of heat of compression in the LAES for the round trip efficiency enhancement. In the baseline LAES configuration, all the heat of compression from the charging process is used to increase the output power of the turbine in the discharging process.
How radial pressure affect GES round-trip efficiency?
The seals of GES system play a critical role in avoiding water leakage. However, it simultaneously causes a friction force which could compromise the response time of the system. Therefore, it has a direct impact on GES round-trip efficiency. In order to achieve a proper sealing effect, radial pressure has to be exerted upon the seal.
