ONGE has been issued the first setoff certified emission reductions from its first registered CDM projects, "waste heat recovery project at Mumbai high." The heat recovery project is the first of the six that ONGC has registered with the Clean Development Mechanism (CDM) of the United Nations Framework Convention on Climate Change, the company said in a statement here. With this, ONGC is set to generate revenue from its carbon reduction projects.

Under CDM process there are two important milestones — registration and issuance. Registration qualifies a CDM project to earn Certified Emission Reduction (CER) credits and become a contender for carbon trading. However, ‘Issuance’ is the ultimate step when the CER’s are physically issued to an entity to trade. Once a project is registered, it is subjected to continuous monitoring and periodic verification for the entire crediting period. “The Waste Heat Recovery Project at Mumbai High recovers heat from the exhaust flue gases of two Process Gas Compressors (PGC),” the statement said.

The PGC is used for compressing the associated gas in crude oil production activities, installed at ONGC’s offshore Mumbai South Platform (MSP). The MSP is the first platform in ONGC having process gas compressor with waste heat recovery unit. ONGC has installed waste heat recovery units (WHRU) at each of the PGC exhaust points, and waste heat is used to heat process oil which is further used to heat various process streams in the crude oil production activities. “The project activity has also reduced the consumption of natural gas, which is otherwise used for heating of process oil for crude oil production activities,” the statement said.