NREL’s New Cell Exceeds Previous Efficiency Record by More Than 8 Percentage Points, Unlocking More Efficient Thermal Energy Storage Applications
A new photovoltaic cell developed by NREL far surpasses the previous, 32% world-record efficiency for TPVs. The new device, developed for a joint demonstration with the Massachusetts Institute of Technology of an electric-energy storage concept, is described inThe device developed by the NREL/MIT team consists of two light-absorbing layers, backed by a highly reflective gold mirror layer and then a heat sink.
“High efficiency is crucial to the engineering and economic viability of TPV systems, and this new 41% record efficiency is a giant step toward making this thermal energy grid storage concept a reality,” said Dan Friedman, an NREL author on the paper.Significantly, a TPV device with 40% efficiency can convert heat to electricity at greater efficiency than conventional steam turbines, such as those used in coal or nuclear power plants.
Combined cycle power plant can reach 60% efficiency with steam temperatures of 580 C and the construction cost is very low. The operating temperatures of this technology is too high, it’s very difficult to find suitable materials when scaling up this process.
Hooray for the environment!!! Keep the great tech coming!!!
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