Georgia State University Library South & Classroom South Chiller and Cooling Tower Replacement

Replacement of two centrifugal chillers, primary chilled water pumps, condenser water pumps, and roof-mounted cooling towers serving the Library South and Classroom South Buildings. This project utilized 3-D laser scanning of the basement mechanical room to accurately depict piping, valves, and equipment on the new work drawings. This step provided greater accuracy than traditional field measurements and was done without any piping as-built or record drawings. New control sequences were also provided for optimum energy savings from variable frequency drives on chillers, condenser water pumps, secondary chilled water pumps, and cooling towers. Construction was completed while maintaining continuous chilled water flow to the campus data center from an interconnected air-cooled chiller.

Assurant Chiller Plant Replacement

Addition of a chiller plant and building air handling units at Assurant, Inc. to replace aged equipment, including penthouse chillers (totaling 950 tons), cooling towers, chilled and condenser water pumps, waterside economizer system, and an auxiliary condenser water loop for 24-hour loads. The chiller plant and air handling units use 16°F delta-T coils for improved energy efficiency. A heat exchanger and controls allow the building’s data center to be served from the upgraded chilled water system for added data center cooling redundancy and better energy efficiency. The project includes replacement of the building automation system with open protocol controllers, including terminal unit actuators and controllers throughout the building, as well as the addition of thirty-eight terminal units to improve temperature zoning. The electrical systems include feeders to support the larger chillers and equipment, and a complete lighting control system that includes over 550 occupancy sensors.

CDC Buildings 20, 34 and 43

A multiphase/multicomponent complex comprising a 75,000 square foot office building (Building 20); a 17,000 square foot transshipping building (Building 34); a 13,500 square foot substation building (Building 43); a 9,800 square foot addition to Building 10; and upgrades to the campus chilled water distribution, fuel oil distribution, and electrical distribution systems. Building 20 includes an integrated facility management control center, security control room, lifestyle fitness center, and offices for facility engineering, facility planning, and project management. Building 34 includes recycling and storage areas, and loading docks. The Building 10 addition houses three 2,250 kW generator sets and four 2,000 kW generator sets to provide the campus with a reliable source of standby power. The chilled water upgrades include conversion to a campus-wide distributed secondary pumping system, chiller and boiler capacity upgrades, and plans for a future three million gallon chilled water storage tank. The campus electrical distribution includes redundant 5 kV building feeders throughout the campus and integrates power transfer and control of engine-generators at multiple locations to provide 2N redundancy across a 15 megawatt system. Sustainable features incorporated into the building include bicycle storage, shower facilities, stormwater fixtures, energy recovery exhaust systems, variable volume air distribution systems, and indoor air quality monitoring.

Central Plant
Chilled water and steam system upgrades include conversion to a campus-wide distributed secondary pumping system, interconnection of two central chiller plants (total 26,000 tons), and plans for a future three million gallon thermal energy storage tank using stratified chilled water. Steam upgrades include a condensate transfer system allowing shutdown of one of two boiler plants during periods of light loads. The standby power system integrates power transfer and control of engine-generators at multiple locations to provide N+1 redundancy across the 15 megawatt system. tems, and indoor air quality monitoring.

Central Prison Central Plant

A one story central utility plant housing electrical, chilled water, steam and fire protection, serving a 170,000 square foot state regional medical center with 120 inpatient beds, and a 150,000 square foot, 230 bed mental health facility with operating rooms, clinics, and clinical laboratories. The electrical area of the central plant includes the utility power company feed, distribution switchgear, and four 1,600kW emergency/standby diesel/natural gas engine-generator sets. In an emergency this area will provide all electrical power needs for the site for several days. The plant also includes three 1,000 ton centrifugal chillers and space for a fourth 1,000 ton unit, along with all pumps, as well as 12 cooling tower cells located on the roof. The steam area of the plant consists of three 600 HP package wet back fire-tube boilers and all auxiliaries. The fire protection area includes a new site-wide electric motor driven fire pump, jocket pump and controller. The entire plant is controlled and monitored by a new central computer based control system.

Davidson College Central Utility Plant

Central chilled water plant to serve a majority of the buildings on the 450 acre main campus. The plant has initial capacity of 1,600 tons with expansion capability to 3,200 tons.

NFCU Heritage Oaks Campus, Central Plant

The 14,000 square foot Central Energy Plant 1 supports the Navy Federal Credit Union’s first five buildings on their corporate campus. The plant provides chilled water, normal and emergency power, and fire protection water services. It contains a multiple, VFD fan cooling tower, and water-cooled 0.52kw/ton centrifugal chillers that stage as the campus load varies. The cooling plant delivers 42 degree Fahrenheit chilled water to the campus via variable primary pumping and variable building secondary pumping. The condenser water system utilizes an electromagnetic, chemical free condenser water treatment system. The chiller plant utilizes chilled water reset and waterside economizer energy management routines. The campus electrical distribution switchgear receives and distributes, from the utility provider, 12,400V electrical service to each building, where normal power and life safety transformers are redundant and sized to fully handle the building load if a transformer fails. The 12,400V emergency generator plant provides standby power for the entire campus with a minimum five day emergency fuel supply in below grade, double wall fuel tanks. A building UPS system provides temporary power until the operating generators stabilize. The fire pump room contains two (one redundant), fire pumps with distribution piping that allows each building to be individually isolated if required. A VFD fire pump adjusts distribution pressure as the county well pump domestic service pressure varies.

University of Miami Emergency Power System Commissioning

Commissioning of three 2.8 MW engine-generator sets and associated paralleling switchgear.

University of Miami Parking Deck and Central Plant

A nine story parking deck for 1,300 vehicles, including ground floor space for a  11,700 ton central refrigeration plant and 8.4 MW emergency power plant with expansion capabilities to 19,500 tons and 14 MW. The plant is designed to serve the Miller School of Medicine. Because of the critical nature of the utilities, the major system components and structure are designed to sustain a Category 5 hurricane.