ENMAX wants to add 197 MW of peaking turbines at Calgary Energy Centre

Calgary Energy Centre No. 2 Inc. (CEC2) is proposing to expand operations at the 320-MW natural gas-fueled, combined-cycle ENMAX Calgary Energy Centre (CEC) located in Calgary, Alberta, by adding three new natural gas-fueled turbine generators to the same site.

CEC2 said in a Dec. 4 application filed with the Alberta Utilities Commission that is a wholly-owned subsidiary of ENMAX Generation Portfolio Inc. (EGPI), which is in turn a wholly-owned subsidiary of ENMAX Energy Corp. (EEC). EEC is a wholly-owned subsidiary of ENMAX Corp.

CEC2 applied Dec. 4 to construct and operate a simple cycle natural gas-fueled power facility, with a maximum output of 197 MW. The proposed facility will be called the Calgary Energy Centre Expansion Project (CECEP). The CECEP is being developed to meet peaking demand in the Alberta Interconnected Electric System (AIES) beginning in June 2019 and is expected to be in operation for approximately 35 years.

In addition to the submission of this application to the Alberta Utilities Commission, CEC2 also submitted this application to the former Alberta Environment and Sustainable Resource Development (AESRD), now Alberta Environment and Parks (AEP), for approval in April 2015, and anticipates an approval in the near future.

Depending on peaking demands, it is expected that the CECEP would operate approximately 15% to 45% of the time. The CECEP will be located at the north end of the 11.2-hectare site occupied by the existing CEC. The integration between the facilities is limited to the utilization of existing staff, demineralized water, potable water, sewer interconnection, natural gas interconnection, and sharing of common areas such as administration and warehousing. The CEC and CECEP do not share resources that will limit the operations of one facility due to the operations of the other.

The CECEP output of a maximum of 197 MW will be produced by three natural gas-fueled turbines. CEC2 has conducted all its development work, including studies submitted for permits and approvals, to consider a range of gas turbine options, with similar layouts all within a tightly defined area. CEC2 is requesting to permit the project site based upon parameters not to be exceeded, regardless of the ultimate turbine selection. The technologies considered for the CECEP are some of the best gas turbine technologies currently available in the market with total nominal output between 130 MW to 197 MW (153 to 232 MVA based on a 0.85 power factor).

This simple-cycle facility will use natural gas as the primary fuel for the gas turbines. CEC2 said it is currently in discussions with NOVA Gas Transmission Ltd. (NGTL), via TransCanada, regarding the gas supply to CECEP. NGTL, under a Letter of Commitment, is creating the technical design to supply the CECEP via the infrastructure currently supplying the CEC. Based on averaged data from product design bulletins, the maximum daily fuel consumption for full facility production is approximately 34,000 GJ/day. Assuming 100% facility utilization for a full year, estimated total fuel consumption would be 12,000, TJ. As previously noted, a more realistic annual utilization factor is in the 10% to 45% range. This corresponds to a yearly fuel consumption of 1,900 TJ and 5,600 TJ respectively.

A project contact is: Grant Weismiller, Vice President, Regulatory Applications, (403) 514-3105, gweismiller@enmax.com.

Notable is that ENMAX applied April 2 at the commission for approval of a version of this project, but that application was rejected by the commission in October after the company failed to provide needed information to support the application.

About Barry Cassell 20414 Articles
Barry Cassell is Chief Analyst for GenerationHub covering coal and emission controls issues, projects and policy. He has covered the coal and power generation industry for more than 24 years, beginning in November 2011 at GenerationHub and prior to that as editor of SNL Energy’s Coal Report. He was formerly with Coal Outlook for 15 years as the publication’s editor and contributing writer, and prior to that he was editor of Coal & Synfuels Technology and associate editor of The Energy Report. He has a bachelor’s degree from Central Michigan University.