Smardt vs. McQuay Comparison of Standard Options and Other Benefits < 400 tons

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Benedict Copeland
6 years ago
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1 Smardt vs. McQuay Comparison of Standard Options and Other Benefits < 400 tons Mike Hayes Director of Sales

2 Smardt vs. McQuay Staging valves for models with 3 or more compressors Level sensor exv control eliminates slugging Isolation valves and disconnect for each compressor standard 70% turndown of CHW flow Knock down and split vessel options for easy egress Lower refrigerant charge - LEED EA-4 credit Superior Controls Better diagnostics Higher Efficiency Monitor via internet Load balancing valve standard for low load operation without cycling CW relief to 55 F 70% turndown of CW flow 2

3 Summary of value added features and their associated costs. Smardt provides over $11,000 in standard features that McQuay does not. Getting these items specified is key to winning the bid. Feature McQuay Smart Isolation Disconnect NA $1,500 Combination Isolation & Check Valve Check Valve Only $ 750 Float Control & Level Sensor NA $ 3,500 Load Balancing Valve NA $1,750 Superior Chiller Controller Carel $ 3,500 3

4 Lower Refrigerant Charge Lower refrigerant charge provide a more environmentally friendly chiller and allows for qualification for the LEED EA-4 credit Chiller Size McQuay Smart

5 McQuay Catalog for WMC notes the higher refrigerant charge. 5

6 Compressor Isolation Individual isolation valves and disconnect switches allow for chiller function when a compressor is being serviced or has been removed Isolation valve allows for the compressors to be serviced without pumping down the chiller Smardt HD check valve design is more robust than standard butterfly check valve. 6

7 EXV Control Superheat control by use of compressor Pressure Temperature sensor may have liquid drops (slugging) in suction line without showing in the SH T/P sensor. Excessive liquid droplets will cause premature impellor wear. Superheat control will cause motor cooling loss in the event that there is a leak in the chiller Smardt liquid level sensor control uses no moving parts that could wear and ensures motor cooling to the compressors in case of low charge. 7

8 Compressor Staging valves used for any unit with three or more compressors Allows for easy compressor staging at any pressure ratio. Tighter leaving chilled water temperature during compressor staging for critical cooling applications Allows for Heat Recovery applications on specified products. 8

9 Load Balancing Valve LBV allows for smooth compressor transition during staging. Valve allows for continuous operation which limits compressor cycling. Compressor cycling could lead to premature compressor failure. LBV allows for lower load operation to limit chiller cycling which lowers chilled water temperature swings. 9

10 Chilled Water Flow flexibility Flow flexibility in the evaporator allows for variable primary pumping which provides for reduced pumping power Primary-secondary pumping is not required eliminating first cost Up to 70% turn down reduces bypass line size lowering first cost and operating cost 10

11 Condenser Water flexibility Flow flexibility in the condenser allows for variable condenser pumping which provides for reduced pumping power The ability to operate at lower condenser water temperatures (down to 55 F) lowers the lift the compressor experiences at part load conditions improving part load chiller efficiency Lower allowance of CW temperature protects the chiller in the event of an unexpected lowering of condenser water temperature. 11

12 Knock Down & Split Configurations Many knock down and split configurations are available to provide greater flexibility with regard to egress of the chiller into the space From simple compressor removal all the way to complete knock down is available The condenser and evaporator can be split in half to create two half length sections. These sections are pre-charged with refrigerant from the factor and only require a gasket and making an oversized flanged connection to assemble the machine 12

13 Chiller Layout Low profile chillers offer a advantage in plant rooms with low ceilings that are typically in basement installations Narrow configurations offer smaller footprints than their side by side counterparts. Low profile chillers also allow for easier compressor services and can be serviced without the need for a ladder or harness. 13

14 Controls Better diagnostics and more monitoring points along with access to the DTC compressor software through the Smardt controls without the need for a additional computer Improved compressor staging logic for more efficient operation, particularly at low loads Remote access to controller is simple and a major asset to the service contractor. 14

15 Very Efficient Low Maintenance Flexible Design Extremely Quiet 1800 Trans Canada Highway Dorval, Quebec H9P 1H7 Phone: (514) Fax: (514)

Smardt Oil-Free Chillers

Smardt Oil-Free Chillers Company History in Brief Turbocor compressor invented in Australia in 1993 Turbocor was relocated to Montreal in 1999 Danfoss forms 50/50 partnership in 2004 Smardt was founded