Building Mechanical Evaluation Review
Over 220,000 square feet, twelve storeys tall and with an underground parkade, the 9925 Building is located on 109th street, in close proximity to Jasper Avenue. The 9925 Building is occupied by a wide variety of offices as well as a restaurant located on the main floor. ES Engineering has reviewed the entire mechanical system to determine efficiency and the general condition of the mechanical equipment located throughout the entire building.
Recommendations were made on how to increase efficiency of existing equipment and systems. ES Engineering was responsible to retrofit one of the two air handling units located in the 9925 Building to operate on a water and glycol system. The design involved the addition of a heat exchanger, rerouting of piping as well and the addition of new valves and other miscellaneous equipment required for proper operation.
The existing air system located in the 9925 Building was originally designed in such a way that the large mechanical systems were required to be operating after hours to serve the restaurant, located on the main floor, exclusively. To save on operating costs, ES Engineering designed a mechanical system where the restaurant is able to operate its own mechanical system, independent of the building. This independence allows for the entire building to operate at minimal capacity, such as weekends and after hours, while the restaurant can function, as demand requires, any time.
VAV Boxes Replacement – 2nd,3rd,4th,6th,10th,12th
An upgrade has been made for the replacement of the existing pneumatic system VAV boxes with new digital VAV boxes for 2nd, 3rd, 4th, 6th, 10th, and 12th floors because of the following reasons as mentioned below:
As the existing air handling unit AHU-1 provides cool air to floors two to twelve and the VAV boxes supply air to the zones/rooms on each floor which are controlled by the zone/room thermostats. The existing VAV boxes are controlled by a pneumatic system while most of the existing VAV boxes have no minimum air flow setting which were further aggravates the stack effect and could also be an issue with health concerns related to not enough outside air being delivered to occupants. Also it causes difficulties to control the zone’s temperature.
The existing terminal boxes are well past their expected service life and are actually causing the main fans to work harder and consume more energy than they need to since the boxes require higher static operating pressure than newer boxes available now.
Main Lobby and Store
ES Engineering was retained by Triovest to design and prepare tender bid documents for the main lobby and store. A separate and dedicated air conditioning unit was installed in the Mechanical Room to supply heated and cooled air continuously for Main Lobby and Store. A heat load calculation has been made to validate the capacity of the air conditioning unit as well as the application of the free cooling design in the system.
Building Perimeter Radiation System - 2nd, 3rd, 5th,7th,8th,9th,10th,11th,12th
The previous floor perimeter radiation system has only two zoning controls and has provided heating to the entire floor as two zones. According to the original designed, by modifying the hot water supply and return piping in each floor and installing digital control zone valves, up to 10 zones can be added to each floor. This will result better temperature control throughout the building and also energy saving on gas and electric consumption. An upgrade has been made in the perimeter radiation system for 2nd, 3rd, 5th, 7th, 8th, 9th, 10th, 11th, & 12th floors. The existing manual control valves for each zone has been replaced with a digital perimeter radiation control valves complete with thermostat as well as drain valves in each zone for easy and flexibility when maintained.
CIRG Server Room
A precision air conditioning system was installed in the CIRG Server Room to maintain the required temperature of the room as well as to serve as back up unit when the building main air conditioning units were shut down during the weekend and holidays. ES Engineering has provided the required design and mechanical plan as well as the tender and bid documents for this project. These, were included the provision and installation of a precision air conditioning system in the server room complete with air cooled condenser, refrigerant piping, ductwork, electrical wiring, and interfaced controls with the existing building DDC control system.
Pampa Brazilian Steakhouse
This new Brazilian Steaknouse is located on the main floor of the 9925 Building near Jasper Avenue. The original design of the tower had most of the air supplied to the restaurant area directly run off from the building mechanical system. Use of this system during off-peak hours such as evenings and weekends proved extremely inefficient as the entire mechanical system for the tower was required to operate but only ended up serving the restaurant area. ES Engineering was required to create a new, complete and efficient mechanical design for Pampa Brazilian steakhouse, operating independently from the main building’s mechanical system.
A significant challenge of design was the limited space available for equipment, this required innovative use of existing areas to place large pieces of air handling equipment. Duct work was required to be routed carefully and efficiently to maximize the use of the space available to serve the restaurant.
The air system developed for this Steakhouse required the consideration of a large indoor charcoal barbecue. Typically not found in conventional restaurants, the use of charcoal presents unique air requirements. An air system was needed to safely filter and exhaust the charcoal barbecue. In addition to these requirements, the mechanical system was still required to be efficient.
Complimenting the completely reworked air system, this new restaurant required many new pieces of plumbing and kitchen equipment, each requiring water, sanitary and/or natural gas connections.
Office of the Ethics Commissioner Reno
ES Engineering was retained to provide detail design of the heating, ventilation and air conditioning system as well as plumbing and fire protection for the Office of the Ethics Commissioner renovation.
Building New Control System
The project involved in the physical installation of the building new DDC system to provide complete connectivity and control per points and to facilitate the programming for the control sequences of all building equipment as well as project administration, system commissioning and testing.