Efficiency Limit of Molecular Solar Thermal Energy Collecting Devices
Artikel i vetenskaplig tidskrift, 2013

As a larger fraction of energy is based on solar energy an other renewable energy sources, technologies for energy storage and conversion is becoming, increasingly important Molecular solar thermal (MOST) is a concept for long-term storage of solar energy in molecules and release of the energy as heat with full regeneration of the initial materials The process is inherently closed cycle and emission free. No assessment of the fundamental efficiency limits of the technology has been made. In this report, I efficiency limits and fundamental factors for molecular design of molecular solar thermal systems are discussed. Maximum efficiencies and potential temperature gradients are estimated using a number of basic assumptions on desired storage lifetimes and energy losses. The predicted maximum solar energy conversion efficiency is 10.6% at a S-1-S-0 gap of 1.89 eV. At this S-1-S-0 gap, the stored energy is able to create temperature differences of similar to 300 degrees C. Several existing systems have an energy storage density in line with the predicted maximum one but do so at larger than optimal S-1-S-0 gaps.

trifluoromethyl-substituted norbornadiene

Maximum solar

photoresponsive

detailed balance limit

(fulvalene)tetracarbonyldiruthenium

thermal

Energy conversion

Solar energy

moieties

storage

energy-conversion efficiency

system

polymers

Molecular solar thermal

photochemical up-conversion

Energy efficiency

Energy storage

cells

donor-acceptor norbornadiene

Solar

Författare

Karl Börjesson

Chalmers, Kemi- och bioteknik, Polymerteknologi

Anders Lennartsson

Chalmers, Kemi- och bioteknik, Polymerteknologi

Kasper Moth-Poulsen

Chalmers, Kemi- och bioteknik, Polymerteknologi

ACS Sustainable Chemistry & Engineering

2168-0485 (eISSN)

Vol. 1 6 585-590

Molekylärt baserat termisk solenergi lagring och omvandling

Vetenskapsrådet (VR), 2012-01-01 -- 2015-12-31.

Ämneskategorier

Kemi

Styrkeområden

Materialvetenskap

DOI

10.1021/sc300107z