By Ejiofor Alike
The recent increase in supply of gas to Olorunsogo Power Station Phase 1 owned by the Power Holding Company of Nigeria (PHCN) in Ewekoro Local Government Area of Ogun State has stalled the generation of 750 megawatts from Olorunsogo Phase 2, which is part of the National Integrated Power Project (NIPP), THISDAY has learnt.
The Nigerian Gas Company (NGC) recently increased gas delivery to the Olorunsogo Phase 1 and cut off gas supply to the solitary unit in Olorunsogo Phase 2 that was already generating electricity.
In a confidential memo dated June 12, 2012, which was obtained by THISDAY, the Managing Director of NGC assured the general manager of PHCN’s Olorunsogo station of adequate gas supply to run all the generating units.
“Following the completion of the pipeline project for gas supply to your plant and the consequent increase in the gas delivery capacity of the completed facility, we confirm that we are able to meet the gas supply requirements to your plant. In the light of the foregoing and as earlier communicated to you at the operational level, we hereby confirm that you can run all your power generating units,” the letter reads.
It was gathered that each unit in the PHCN plant required eight million standard cubic per day (scf/d) of gas to keep running, translating to 56million scf/d for the seven out of the eight units to generate 150mw.
Each of the eight units of the 335megawatt capacity PHCN plant has a template capacity of 42MW but cannot generate more than 38mw due to Nigeria’s hot climate.
However, a source close to NIPP told THISDAY at the weekend that instead of using 56 million standard cubic feet of gas per day to run the seven units and generate only 150MW, the NGC should have channeled the additional gas delivery capacity to Olorunsogo Phase 2 to boost the country’s power supply.
The 750MW-capacity Olorunsogo Phase 2 has four units of gas turbines and two units of steam turbines, each with a capacity of 120MW.
By design, one unit of steam turbine in the NIPP plant is attached to two units of gas turbine, implying that when gas is feed into two units of gas turbines to generate 240mw, the heat generated will automatically keep one unit of steam turbine running to generate additional 120MW.
THISDAY gathered that before the NIPP plant was completely shut down recently, one unit of the gas turbines was running, with the heat generated being wasted.
A source close to NGC told THISDAY that it would have required little gas to keep a second unit running so that the heat generated would be sufficient to run one steam turbine to generate a total of 360mw.
However, the NGC has not only cut off gas supply to the one unit in the NIPP plant but also diverted a recent increase in gas delivery to the PHCN plant to generate only 150mw.