From a review of 1,406 pieces of research
on renewable energies between 1996
– 2012, it is discovered that during the
past 15 years in Thailand researches are focused
on 5 renewable technologies, namely solar,
ethanol, bio-diesel, biomass, and biogas.
There are 1,311 pieces of research on these
5 technologies, accounting for over 90% of
all the research reviewed. Among them
research on solar has the highest share,
accounting for 30%, followed by ethanol
for 22%, bio-diesel for 20%, biomass for 12%,
and biogas for 9.5% as shown in Figure 8.