URGENT-Dehumidification System- Naval Base Point Loma, San Diego, CA

NBPL Dehumidification System Location: Naval Base Point Loma, San Diego, CA Spec #: NBPLDH610JL Rev: Orig Page 1 of 8 1. SCOPE STATEMENT OF WORK 1.1. Portsmouth Naval Shipyard (PNSY) is seeking to lease a Dehumidification (DH) system for use at Naval Base Point Loma, CA to provide dry and tempered process air for conditioning various industrial applications. The system must include one DH unit, one inline electric heating coil, a 10 Ton DX + electric heat HVAC unit, and supporting power cable. The DH system must be frame/skid mounted and meet the lifting & handling requirements as defined in the specification. Steam is not available at the location of installation. All heating and reactivation coils must be electric resistance heating elements. 2. REFERENCES 2.1. Issues of Publications - The following documents in effect on the date of request for proposal form is part of this specification to the extent applicable, or as specified herein. Within the specification, they shall be referred to by their basic designation only. 2.1.1. Government 2.1.1.1. General Specification For Integral Lifting Attachment Design 2.1.1.2. US Federal standard A-A-59326: Standard for cam action couplings. 2.1.2. Nongovernment 2.1.2.1. ARI Standard 410 2.1.2.2. ASHRAE: Handbook of Fundamentals 2.2. Order of precedence - In the event of conflict between the text of this specification and that of the references cited above, the text of this specification shall take precedence. Nothing in this specification, however, shall supersede applicable laws or regulations unless a specific exemption has been obtained. 3. TECHNICAL REQUIREMENTS 3.1. Component List- The Contractor is required to bid on a single equipment list, 3.1.1 3.1.1. Required components PC-01 through PC-6 are listed below based on 1 DH at 5,000 CFM each. PIECE NO. QTY. NAME OF PART PARA NO. PC-01 1 DH Unit: 5,000 CFM 3.2 PC-02 1 60 KW Inline Electric Heating coil 3.3 PC-03 1 10 Ton HVAC (DX coil + Heat) 3.4 PC-04 150 FT Electrical Power Cable (DH) 3.6 PC-05 150 FT Electrical Power Cable (10 Ton HVAC) 3.6 PC-06 400 FT Electrical Power Cable (Inline Heater) 3.6 -- 1 of 8 -- NBPL Dehumidification System Location: Naval Base Point Loma, San Diego, CA Spec #: NBPLDH610JL Rev: Orig Page 2 of 8 3.2. Dehumidification Unit 3.2.1. 5,000 CFM DCCU Physical Attributes 3.2.1.1. Physical Attributes: Dimensions 15’ x 5’ x 8’6” [L x W x H] Maximum Weight: 6,000 Lbs. 3.2.1.2. All Components must be fully integrated within single housing. 3.2.1.3. Electrical Power Requirements: 1 Circuits at [460 Volt AC / 3 Phase / 60 Hz] 3.2.1.4. Must be designed to operate of no more than one 200A circuit 3.2.1.5. Process air outlets: Minimum quantity of one at 20” Dia. 3.2.1.6. Process air returns: Minimum quantity of one at 20” Dia. Process Air Requirements 3.2.1.7. Process Air Flow requirements: 5,000 CFM @ 5 inches External Static Pressure 3.2.1.8. Process Air Fan: Fan curve capable of delivering specified flow and pressure, installed with TEFC Premium Motors, and VFD controlled 3.2.1.9. Total Cooling capacity: 60 Tons Nominal 3.2.1.10. Moisture Removal Rate: 140 Lbs./Hr Total [Desiccant Wheel 140 Lbs./Hr] 3.2.1.11. Moisture Removal Rate Basis: [80°F EDB / 60% RH] 3.2.1.12. Process Air inlet Filtration: Moisture Separator / Demister type filtration for purging 98% of the moisture. Paper or fibrous filtration media is not acceptable. Desiccant Reactivation Requirements 3.2.1.13. Reactivation Air Flow Requirement: Shall be sufficient to dry the desiccant wheel at rated MRR. 3.2.1.14. Fan curve and static pressure requirements need to be sized appropriately to overcome pressure drop of all internal components, heating coils and desiccant wheel. 3.2.1.15. Electric reactivation required, steam and natural gas utilities not available. 3.3. 60 KW Electric Inline Post Heater (Passive- No blower) 3.3.1. The 60 KW electric heater shall serve as a process air post heater to the electric DH unit as outdoor temperatures require. 3.3.2. Nominal heating capacity of 60 KW. 3.3.3. Operating Voltage: 460 Volt 3.3.4. Maximum Full Load Amperage: 75 Amp 3.3.5. Maximum allowable weight: 650 lbs 3.3.6. Duct connection inlet and outlet: 20 IN Diameter Nominal duct connection 3.3.7. Integral Heater safety controls & high temp limits 3.3.8. Thermostatically controlled discharge air temp set points. -- 2 of 8 -- NBPL Dehumidification System Location: Naval Base Point Loma, San Diego, CA Spec #: NBPLDH610JL Rev: Orig Page 3 of 8 3.4. 10 Ton HVAC Unit with DX Cooling Coil & Electric Heat 3.4.1. Nominal cooling Capacity: 10 Tons 3.4.1.1. Unit charged with R 410A meeting specifications defined in section 2.1.2.1 3.4.2. Process Air Rated Flow: 3.4.2.1. 3200 CFM @ 2 IN TSP 3.4.2.2. 4800 CFM @ .6 IN ESP 3.4.3. Operating Voltage: 460 Volt 3.4.4. Maximum Full Load Amperage: 100 Amp 3.4.5. Electric resistive Heating Coil Capacity: 36 KW 3.4.6. The HVAC unit shall have the ability to operate in a dehumidification capacity by operating the cooling coil and post heating coil simultaneously. Although this mode of operation will yield a minimal change sensible change in air temperature, it shall provide effective moisture removal rates. 3.4.7. Integral Heater safety controls & high temp limits 3.4.8. Thermostatically controlled discharge air temp set points. 3.5. Flexible Duct Fittings 3.5.1. Couplers shall be provided to attach 20 IN flexible duct work to all DH and HVAC equipment provided. 3.6. Electrical Power Cable 3.6.1. Power cable shall be included with each piece of electrical machinery for all circuits requiring power. 3.6.1.1. DH Machine 3.6.1.2. Inline 60KW heater 3.6.1.3. 10 Ton HVAC Unit 3.6.2. Power cables shall be 150 FT in length each for the DH machine and the 10 ton HVAC unit. 3.6.3. Power cable for the inline 60KW heater shall be 400 FT in length. 3.6.4. Power cable shall be rated for 460VAC /3 PH/ 60Hz/ 200 A. 3.6.5. Gauge selection for power cable must prevent …