Stamps on Ocean Thermal Energy Conversion – Stamps of Nauru 1982
Ocean Thermal Energy Conversion (OTEC) uses the temperature difference between the cooler deep and warmer shallow or surface seawater to run a heat engine and produce useful work, usually in form of electricity. OTEC can operate with a very high capacity factor.
Among Ocean energy sources, OTEC is one of the continuously available renewable energy sources. Up to 88,000 TWh/yr of Power could be generated from OTEC without affecting ocean’s thermal structure. Currently, World’s only operating OTEC plant is in Japan overseen by Saga University.
In 2002, India also tested a floating 1 MW OTEC plant near Tamil Nadu.
In 1970, The Tokyo Electric Power Company successfully built and deployed a 100Kw closed-cycle OTEC plant on the Island of Nauru. The Plant became operational on 14 Oct 1981, producing 120 KW of electricity, 90 KW was used to power the plant and remaining electricity were used to power a school and other places. This set a world record for power output from an OTEC system where power was sent to the real power grid.
Nauru issued a set of Four stamps (two se-tenant pairs ) on the OTEC plant on 10 June 1982. A Sheetlet with two 40c stamps is listed. It features the OTEC plant on the stamps and on left and right side labels The finished 100KW electricity generating plant is featured. The bottom label shows the pipelines of the plant during low tide.
Europa 2016 Spain Think Green Unusual FDC on Vellum – Real Leaf Effect
The theme for Europa Stamps 2016 was “Ecology in Europe – Think Green”.
The image selected for the EUROPA stamps 2016 was the design from Cyprus Post artist, Ms. Doxia Sergidou, chosen amongst 24 outstanding entries.
The stamp motif shows a hand on the top side actively replacing the grey colour (the environmental pollution) with the green colour which symbolizes environmental living and hope. The image explains that “it is in our hand to create a greener planet“.
Spain issued a stamp on Think Green theme on 22 Apr 2016. The design of stamps shows in gray a city covered by Pollution ,with dark clouds and cables on roof and on the other hand a city where green is predominant color with renewable energy symbolised in mills,trees ,plants & Birds . A Cyclist encouraged pollution free transport.
The First Day Cover for this issue is unusual as it is printed on Vellum paper giving it a green real leaf effect.