Improving Condenser Safety In Cold Chain Facilities

Transcription

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2 Improving Condenser Safety In Cold Chain Facilities

3 Gerald Anderson, PE Eastern Regional Sales Manager, Refrigeration 30 plus years in the refrigeration industry

4 AGENDA Overview and Goals Basic Definitions Design for Safety Key Points Question

5 GOALS Familiarization with important considerations for safe selection and operation of evaporative equipment Minimize risks to safety by selection of proper equipment

6 DEFINITIONS What is an evaporative condenser? PRINCIPLE OF OPERATION The vapor to be condensed is circulated through a condensing coil, which is continually wetted on the outside by a recirculating water system... The evaporation removes heat from the vapor in the coil, causing it to condense.

7 EVAPORATIVE CONDENSER

8 COUTNERFLOW FORCED DRAFT AXIAL FAN

9 DEFINITIONS Safety The condition of being safe from undergoing or causing hurt, injury, or loss Safe 1. Free from harm or risk 2. Secure from threat of danger, harm, or loss

10 DEFINITIONS Safety not only applies to people, but by the broadest definitions: 1. Employees 2. General populace 3. Physical property 4. Product 5. The environment

11 EVAPORATIVE CONDSENER DESIGN CONSIDERATIONS Materials of Construction Maintenance Considerations Location and local environment Water quality Improper material selection can cause premature failures: Coil leaks Refrigeration loss Water leaks } Unsafe for employees, general populace, environment, product, physical property

12 MATERIALS OF CONSTRUCTION Location and environment Water quality Air quality

13 CONDENSING COIL Continuous serpentine coil Carbon steel hot-dip galvanized after fabrication (HDGAF) Stainless Steel Copper

14 STAINLESS STEEL C O N S T R U C T I O N Thermosetting Hybrid Polymer Stainless Steel

15 MAINTENANCE CONSIDERATIONS Maintenance is imperative for safety Easy and safe access Equipment designed to not impede ease of service Skill set available

16 MANUALS Always follow the manufacturer s operation & maintenance manual and rigging & assembly instructions Follow all Dangers, Warnings, and Cautions Wear proper protective gear

17 10 TIPS FOR EASY CONDENSER MAINTENANCE 1. Check the overall condition of the unit 2. Follow proper lock out tag out procedures and disconnect motor switches 3. Inspect and clean debris from strainers 4. Inspect the water distribution system 5. Flush dirt and debris from the cold water basin

18 10 TIPS FOR EASY CONDENSER MAINTENANCE 6. Check the make-up water supply 7. Adjust the bleed rate accordingly for your local water quality and evaporation rate 8. Fix any tension problems on the belt 9. Inspect coils for scale, rust and failure 10. Lubricate fan shaft bearings every 3 months at a minimum

19 EVAPORATIVE CONDSENER DESIGN CONSIDERATIONS Accessibility Need to access all surfaces safely Confined space concerns Proper inspection and maintenance Always follow OEM recommendations

20 OPTIONAL SERVICE ACCESSORIES Protection for service personnel OSHA requirements External service platform and ladder Internal ladder

21 ACCESSIBILITY Pre-Assembled Platform, Ladder, with Safety Cage

22 ACCESSIBILITY Pre-Assembled Platform and Access Door Ladders

23 ACCESSIBILITY Pre-Assembled Handrail Packages

24 MECHANICAL SERVICEABILITY Oversize access door Built-in interior walkway Large internal plenum Easily adjustable drive system

25 ACCESSIBILITY Motor Removal System with Davit Arm(s)

26 WATER TREATMENT GUIDELINES Largest single cause of coil failure and refrigerant leaks Large variable across the country Materials of construction are important Due to continually wet surfaces, very important

27 WATER TREATMENT GUIDELINES

28 No Water Treatment Proper Water Treatment

29 Corrosion and Scale Buildup on Coils

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31 KEY POINTS Considerations for safe equipment Design for the application Design for safe, easy access Maintain the equipment

32 Q&A Gerald Anderson