The Harrison Energy Centre is a 1GW gas-fired, combined-cycle power project located in the Harrison County of Ohio, US.

Canada-based energy investing company EmberClear is developing the project through its subsidiary Harrison Power with an estimated investment of approximately £761.62m ($1bn). EmberClear will work with Mitsubishi Hitachi Power Systems of America (MHPSA) for the financing and development of the project.

The construction works on the project are expected to be started in the second quarter of 2021, while the start of commercial operations expected by the first quarter of 2024.

The Harrison Energy Centre is also envisaged to produce power from hydrogen with the construction of a hydrogen production facility and associated storage infrastructure.

Location and site details

The Harrison Energy Centre combined-cycle power project is located in the Harrison County Industrial Park in Ohio, US.

The project site will occupy approximately 100acres in Cadiz Village of Harrison County, in the Utica shale region, approximately 80.46km west of Pittsburgh, Pennsylvania.

Harrison Energy Centre make-up

The combined-cycle power station will comprise two advanced combustion turbine power trains equipped with air-cooled condensers to minimise water utilisation and discharge.

Each power block will feature an M501JAC combustion turbine, a heat recovery steam generator (HRSG), and a steam turbine generator in a 1x1x1 configuration. The turbines and generators for the plant will be supplied by Mitsubishi Hitachi Power Systems (MHPS).

The heat recovery steam generator assembly will comprise a superheater, an evaporator, and an economiser to absorb the waste heat from the combustion gas turbine. It will also be equipped with a supplemental duct burner to facilitate variation in electrical output as per the requirement.

The selective catalytic reduction (SCR) system will be installed to control the nitrogen oxide (NOx) emissions from the HRSG stack, while the oxidation catalyst will regulate the carbon monoxide (CO), as well as the volatile organic compound (VOC) emissions.

The project will also utilise electrostatic precipitators (ESP) and the flue gas desulphurisation (FGD) scrubbers to control emissions from the exhaust flue stack.

The Harrison Energy Centre is also planned to utilise the Hydaptive™ and the Hystore™ packages to access the off-site hydrogen production and storage infrastructure.

The plant is envisaged to run on 30% green hydrogen initially and operate with 100% hydrogen in the future.

Infrastructure facilities

The other infrastructure facilities for the project will include a 1,387KW (1,860HP) diesel-fired emergency generator along with a 238.6KW (320HP) diesel-fired fire pump. While the emergency diesel generator will produce electricity for the critical systems of the plant, the diesel-fired pump will deliver fire protection requirements of the power blocks.

It will also feature a 44.55 MMBtu/hr natural gas-fired auxiliary boiler to warm up the power blocks and reduce the equipment start times.

Power evacuation

The power generated by the Harrison Energy Centre will be evacuated to the Pennsylvania-New Jersey-Maryland (PJM) interconnection system that lies within the AEP Locational Deliverability Area (LDA).

The power evacuation line will terminate at a new 132kV substation, located approximately 7.5km south of the project site.

Natural gas supply

The natural gas to the combined cycle power project will be supplied through a 2Bcf/day gas gathering facility located approximately one mile away from the project site.

Contractors involved

Gemma Power Systems, a subsidiary of Argan Company, won the engineering, procurement and construction (EPC) contract for the Harrison Energy Centre in December 2019.

Mitsubishi Power Systems was selected by EmberClear for the supply and installation of turbines and generators in September 2020.