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ENERGY MANAGEMENT


to be used.


• TOH will make available to ESCO all requested information pertaining to changes in operation of the facility, as per the contract to provide comprehensive services.


• One report will be published at the end of each applicable Guarantee Year and delivered to the TOH approximately 12 weeks after the receipt of the year-end utility bills.


In conjunction with TOH communications group, the ESCO developed a site-specific awareness program that will facilitate better understanding of the Energy Performance Contract among hospital personnel, visitors and the surrounding community. This program concentrated on concepts and measures that emphasise open communication and participation. The end result is more knowledgeable staff and higher morale, which leads to more satisfied hospital personnel, and a better bottom line performance. Open communication enhances respect and credibility of management, and develops a ‘Team’ environment. Getting staff ‘buy-in’ to process is vital for long-term, sustainable programme success. The awareness program resulted in an


estimated annual $80,000 savings to TOH, which was based on internal metering for utilities, more staff reporting water leaks, overcooling or overheating as well as suggestions to save more energy through opportunities recommended trades and staff.


Training A specific training plan was developed for all newly installed equipment. The ESCO provided training for all of its on-site equipment. Training included six building operators, all three site managers and other associated management personnel. It also provided an initial one-day overview of enterprise business intelligence (EBI), including basic system operation, understanding the graphics, sign-on procedures, security features, trending, signing on from a remote location, and overall system navigation. For new equipment such as chillers and


boilers the ESCO provided effective training for site personnel. Manufacturer’s reps and technicians were used to ensure TOH staff had a complete understanding of how the equipment works, how it needs to be maintained, how to troubleshoot problems and how to prevent problems.


Energy management action plan The energy management action plan (EMAP) was deposited with Canada’s Voluntary Challenge & Registry (VCR) for the Ottawa Hospital campuses. The Civic and Riverside campuses were deposited 11 June 2003 while the General campus was deposited 29 January 2004.


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Dr Jack Kitts, President and CEO of TOH (left) receives the NRCan Energy Innovators incentive cheque.


Energy conservation measures (ECMS) Lighting and Automatic Control – Primarily


aimed at re-designing most lighting fixtures in the facilities to reduce lighting electricity usage. This measure would benefit TOH by reducing energy consumption, increasing ballast life, and increasing transformer spare capacity for additional medical equipment


plug load. Power factor correction – TOH was penalised for having a low power factor. Power factor was corrected after the retrofit


was completed. Zone air control and variable speed


drives (VSDs) – Ventilation to unoccupied areas of TOH was shutdown or reduced through the use of zone dampers, to reflect actual occupancy of the various spaces. As areas are shutdown the AHU capacities will be adjusted via variable speed drives (VSDs) to maintain optimum air flow and reduce energy usage. Temperature sensors were located in each space to maintain required comfort levels along with pushbutton overrides to allow for ‘after-hours’ use as


required by housekeeping. Air handling unit modifications – The air handlers were modified to operate more


efficiently and with lower operating cost. Energy Management System (EMS) –


A new centralised direct digital control system was installed. State-of-the-art building automation and control system will result in improved comfort conditions, reduced energy consumption, improved maintenance staff productivity, and total HVAC system


optimisation. Metering and control – It is proposed in


the next phase to incorporate into the EMS TOH’s key existing submeters to more


effectively manage and optimise costs. Variable volume pumping – Cooling loops equipped with differential pressure bypass valves are ideal candidates for the application of VSDs to vary the flow of the pump. The existing main chilled water system


was converted to variable flow with the installation of VSD’s on the secondary pumps and revising the existing three-way chilled water valves to two-way operation. Upgrade boiler heat recovery (Flu-Ace) –


It is proposed to upgrade the pumping and distribution system of the boiler heat recovery loop to variable volume in a next phase. The Flu-Ace tower fan would also be upgraded in capacity to ensure effective heat


transfer. Upgrade satellite boilers with condensing


technology – High efficient gas-fired condensing hot water boilers were installed to displace the less efficient conventional boilers for the reheat and domestic hot water systems


in Building 16 and 5/Civic campus. Steam distribution upgrade – The


measures focused on automated steam shutdowns and repairing valve leaks found


during the audit also to do a steam trap survey. Upgrade pipe and tank insulation –


Based on an extensive audit, there is a significant amount of piping with missing insulation. All uninsulated steam and condensate piping were insulated throughout


the campus. Install 800T centrifugal heat pump


chiller – The ESCO upgraded the 2 x 1,000T


‘The ESCO provided training for all of its on-site equipment. Training included six building operators, all three site managers and other associated management personnel.’


IFHE DIGEST 2014


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