Ontario University – Confidential

BESS & Microgrid System

The battery energy storage system facility reduces electrical demand for a Class A electricity facility operating during anticipated Global Adjustment hours.

Johnson Controls, the turnkey EPC and facility energy service company, engaged HH Angus to engineer a 2 MWe (4 MWh) behind-the-meter battery energy storage system (BESS).

The installation is part of a microgrid design that incorporates rooftop solar panels for six buildings (~500kWe), a 2 MWe (4 MWh) BESS, and a 2 MWe natural gas engine-generator peaker. The goal of the installation is to reduce Global Adjustment charges. It also supports much of the facility in the event of a power failure on the grid.

The solar panels and BESS were installed during spring and summer of 2018, and the engine-generator peaker plant has been submitted for a building permit.

SERVICES
Prime Consultant | Electrical Engineering

PROJECT FEATURES
Status: Completed 2021

LOCATION
Ontario

KEY SCOPE ELEMENTS
Engineered 2 MWe (4MWh) behind-the-meter battery energy storage | Microgrid design including solar, BESS, NG engine- generator peaking plant for six buildings

Energy innovation funding

The project was predicated on receiving Government of Canada Strategic Innovation Fund support for innovative energy projects.

Canadian Food Inspection Agency

Electrical Upgrade

HH Angus was engaged to upgrade the electrical distribution at the Canadian Food Inspection Agency, a regulatory body inspecting food, animals, and plants to protect the health and well-being of Canada’s people, environment and economy.

Our initial task on this project was to investigate existing major electrical systems and provide a concept design to replace and upgrade the existing equipment, which had reached end-of-life. Prior to implementation, we developed detailed phasing sequences to minimize the impact of power outages on the client’s operations.

Key design elements included replacing equipment with up-to-date technology, increasing capacity to ensure long service life, and meeting anticipated building usage. We also added power factor correction to reduce electricity costs for anticipated future rate structures. The new design provided flexibility for power distribution and technology. The client’s expectation was the replacement of main electrical equipment should carry the building reliably for at least 25 years.

HH Angus’ scope of work included design engineering services for replacement of 2 main 13.8kV underground service feeds – two 2000kVA dry transformers, two 600V switchboards feeding the building services, 600v switchboards that supply another 15 various 112.5KVA/150 KVA/225KVA-rated 600/208-120 dry transformers, 208/120V CDP distribution panels, MV/LV power cables, power factor capacitors and some transfer switches. In addition, associated equipment auxiliaries were replaced or upgraded. We also managed coordination, testing and commissioning of the replacement equipment.

SERVICES
Prime Consultant | Joint Venture | Electrical Engineering

PROJECT FEATURES
Status: Completed 2017

KEY SCOPE ELEMENTS
Review and upgrade of existing end-of-life equipment | Developed detailed phasing sequence to minimize the impact of power outages | Power correction factor added to reduce future electrical costs | Replacement of two 13.8 service feeds & transformation

Public Works & Government Services Canada

Tunney’s Pasture

HH Angus was engaged as Prime Consultant on a chiller plant installation for this public building in Ottawa. The project installation serviced nineteen buildings with a total floor space of ~3,170,000 ft2 and was comprised of two chillers @3500 tons.

Tunney’s Pasture is a 49-hectare (121 acre) mixed-use campus in Ottawa, including government services, commercial offices and residential buildings. Its existing steam-driven chillers were at end of life and operating with R22 refrigerant, the import and production of which is banned as of January 2020. Also, the use of river water for free cooling needed improvement and the river water pumping system was not operating efficiently.

HH Angus, in joint venture with Goodkey Weedmark, was retained to undertake conceptual studies to evaluate changing the chillers from steam power to electrical power. We also made recommendations for improving the free cooling aspects of river water and making more effective use of the river water pumping system.

HH Angus provided conceptual evaluation of replacing the chillers, in terms of efficiency, physical location and necessary steps required to change from steam to electrical power. Once the chiller concept was resolved, we evaluated optimization of the river water pumps to undertake the condenser water cooling and considered how to efficiently use the free cooling available from the river in low load conditions.

Optimizing free cooling and condenser water, using river water instead of cooling towers, resulted in energy efficiency and reduced carbon footprint for this installation. We also identified benefits to the client through improvement in chiller efficiency using the latest technology, and the elimination of boiler operation during the summer months.

SERVICES
Prime Consultant | Mechanical Engineering | Electrical Engineering

PROJECT FEATURES
Status: Completed: 2017

LOCATION
Ottawa, Ontario

KEY SCOPE ELEMENTS

Evaluation to optimize river water pumps to undertake condenser water cooling & efficient use of free cooling from the river in low load conditions | Consulted on technology that would eliminate boiler operations during summer months

Enwave Energy Corporation

Pearl Street Cogeneration Plant

HH Angus provided design and engineering services for Enwave’s CHPSOP 2.0 contract to install a 2 x 2 MW Cogen project at the Pearl Street plant.

The Pearl Street steam plant is one of two major boiler plants that service Enwave’s downtown Toronto heating system, and usable plant space there was a significant constraint. The new cogeneration was to be installed in limited space in the basement.

We first undertook a feasibility study to determine whether the existing basement would accommodate a 4 MW single engine or 2 x 2 MW engines. Based on the study results, Enwave selected the 2 x 2MW option.

The initial phase of the detailed design was to determine which cogeneration engines would be options, given the space constraints. It was established that only one supplier’s equipment would fit. The next phase involved pre-tenders, including engine generator sets, heat recovery steam generator, selective catalytic reduction, and switch gear.

Plant design used 3D software to ensure all equipment could fit without coordination clashes. The combustion and ventilation required were a major challenge, entailing architectural changes to the building to meet code, and a new area way on the outside of the building, to allow for combustion air and ventilation air. The engine generator had to be disassembled at the distributor and reassembled on site. The focus then moved on to locating a suitable routing for the breeching and silencers off the engine exhausts, which had to travel from the basement to the roof.

In a CHPSOP 2 contract, the client is exporting power into local LDC (Toronto Hydro). HH Angus designed protection, monitoring, and control requirements per Toronto Hydro’s embedded generation technical interconnection requirements.

HH Angus coordinated with Toronto Hydro, on behalf of the client, for: revenue metering CTs/PTs to install in the switchgear hydro compartment; metering cabinet; and commissioning of the synchronization test, protection, and SCADA points. We also issued a signed, embedded generation commissioning report.

SERVICES
Mechanical Engineering | Electrical Engineering

PROJECT FEATURES
Status: Completed 2017

LOCATION
Toronto, Ontario

KEY SCOPE ELEMENTS
Use of 3D plant design to ensure all equipment could be accommodated | Design restricted by space constraints | Design, protection, monitoring & control requirements per Toronto Hydro's embedded generation technical interconnection requirements

McMaster University

Trigeneration Plant

HH Angus was initially engaged to perform a Detailed Engineering Study to determine the viability of installing a natural gas-fired turbine for power and steam generation, and the use of absorption cooling to balance out steam production in the warmer months.

For a full year, we reviewed heating, cooling and electrical power loading at McMaster University. We also reviewed operating costs covering maintenance, operating and natural gas costs, and completed a sensitivity analysis of gas and power pricing variances. Capital and Operating budgets were also prepared to determine ROI on the proposed investment.

Following the Detailed Engineering Study, we were engaged to design the new trigeneration plant using a gas turbine (5.4 MW) coupled with an HRSG (Heat Recovery Steam Generator), natural gas compressor, absorption chiller (1000 tons) and centrifugal chiller (2500 tons). The plant was installed in the existing central utility plant room, and significant demolition of redundant equipment was undertaken to generate the space for this system upgrade.

There were a number of interesting challenges associated with the work:

Selective demolition of two existing steam boilers, two existing incinerators and one 5,000 ton electric centrifugal chiller including isolation of services and asbestos abatement to not impact existing plant operations
Fitting this large equipment into an area with significant space constraints
Creating a path of ingress for the equipment from outside into the sub-grade basement level of the plant for installation during winter months where the weather would be unpredictable
Minimizing the impact on daily operations within the plant during the demolition and construction phases.
Integration and coordination with a switchgear replacement project running in parallel with the cogeneration project
Targeting a completion date of October, 2017 to ensure the client would receive full IESO funding for the project

Some of our solutions included:

Thorough surveys of existing equipment and services to ensure the equipment slated for demolition could be isolated from the operating plant with minimal to no service interruption
Engaging with equipment suppliers at an early date to ensure required footprints were allocated
Coordinating with the structural engineers to design a removable roof cap that could be installed prior to the existing roof being cut open to allow equipment installation
On-going coordination with plant staff during the design phase to get buy-in of any modifications required to the existing plant
Pre-tendering long lead item equipment to ensure on-site delivery dates would meet the construction schedule

By designing to eliminate potential interferences or issues with installation, we were able to meet the delivery targets and deliver a successful project.

SERVICES
Prime Consultant | Mechanical Engineering | Electrical Engineering

PROJECT FEATURES
Status: Completed 2017

LOCATION
Hamilton, Ontario

KEY SCOPE ELEMENTS
Year-long detailed engineering study | Reviewed heating, cooling and electrical power loading | Study included sensitive analysis of gas and power pricing variances | Introduced new design for trigeneration plant usage, a gas turbine (5.4MW) coupled with an HRSG, natural gas compressor, absorbtion chiller and centrifugal chiller