hts engineering company presentation by evan miller

OFFERING HEAT TRANSFER OFFERING HEAT TRANSFER SOLUTIONSSOLUTIONS

Who are we?• Located in Peabody, MA

• 9 Degreed Sales Engineers

• 1 Secretary/Sales Assistant

• In Business Since 1996

HTS Boston

Arsenal St.

Novartis

South Shore Conservatory

Kimball Woods

Biogen

Harvard Life Sciences

Worcester Courthouse

Good Samaritan Medical Center

Philosophy

• Support Engineers With Fast, Quality Design Information

– Keep Engineers out of Trouble

• Deliver Quality Systems And Products On Time At Competitive Prices

• Never Leave An Engineer Or Owner With A System Or Product That Doesn’t Work

Engineering Focus

• Air Handling Systems

• Factory Packaged Mechanical Rooms

• Compressorized Systems/Chiller Systems

• Additional HVAC Products

Air Handling


– Custom Units

– Heat Recovery Systems

– Natatorium Units

– Desiccant Units

Custom Units• Quality Product

• Quality Product

• Tight CasingLess Than 0.5% Leakage @ 12” S.P.Welded Floors, No Oil CanningWater-Tight, Contains CondensateOn Time DeliveriesSuperior Esthetics With Highest Quality FinishVery Few Site Issues

Custom Units

Custom Units

• Same-Day Turn-Around On Comprehensive Designs

Custom Units

Custom Units

Custom UnitsUMASS Amherst ISB

ATT

AT&T

Custom Units

Biogen-1

Custom Units

Biogen-2

Custom Units

Biogen-3

Custom Units

Carnegie Custom Units

Hahnemann Custom Units

Harvard Laser Custom Units

HR Coils Custom Units

ZebrafishCustom Units

• 100% Outdoor Air Units

• Packaged DX Units (Air-Cooled or Water Cooled Condensing Sections) (Water-Source Heat Pumps Up To 200 Tons)

• Natural Gas Heat (Direct or Indirect)

• Indirect and Direct Evaporative Cooling

Custom Units

• Double Wall Panelized Casing– Results in rigid

construction– Eliminates leaks– Accessible for easy

maintenance

• Frame– Welded steel base– Extruded aluminum tubing– Cast aluminum corners

• Removable Panels– 2” or 4” thick– Fiberglass or foam

insulation

Custom Units

• Energy Recovery– Flat-plate heat exchangers– Energy wheels

• Heating– Indirect gas furnace– Direct gas furnace– Hot water coil– Steam coil– Heat pumps– Electric

Custom Units

• Cooling

– DX coil

– Chilled water coil

– Evaporative Cooling

• Packaged Refrigeration

– Air cooled condensing unit

– Water cooled condensing unit

– Water source heat pump

• Ground source or Boiler/Tower

– R22 & R410a Refrigerants

Custom Units

• Example 1:– 50,000 CFM with Flat Plate HX– CW Cooling– HW Heating– Integral gas fired humidification (2,160 lbs/hr)– Duct Silencers– Heated service vestibule– 99.97% HEPA Filters– Built in 7 sections for shipment (too wide – 22’)

Custom Units

Custom Units

• Example 2:

– 20,300 cfm

– 66 ton chilled water cooling

– 66 ton emergency DX cooling

– (4) scroll compressors

– UV lights on both cooling coils

– 12” 95% cartridge final filters

– SF & EF VFD’s

Custom Units

Custom Units

• Example 3:– Redundant air tunnels, 2000 cfm– Common Base Frame– Integral Electric to Steam Generator– Two 8 ton refrigeration systems

• hermetic scroll compressors• 2 cooling stages each• Modulating Hot Gas reheat

Custom Units

Custom Units

• Example 4:– Multi-zone– Replacement Project – 12 units– 6,400 – 13,500 CFM– Dual deck– Hot water heat– Air cooled Refrigeration

Custom Units

Custom Units

• Example 5:– Evaporative Condensed

Custom Units

• Patriot Place:– Air-Cooled Condensing Section

Custom Units

• Frisbee Hospital:– Evap-Cooled Condensing Section

Custom Units

Air Handling


– Custom Units



– Desiccant Units

• 4 Methods of Heat Recovery

Flat Plate Heat Exchangers

Enthalpy Wheel

Heat Recovery Coils (Run Around Loop)

Heat Pipes

Heat Recovery

• Flat Plate Heat Exchangers

– Aluminum plates are ribbed or dimpled

– Plates stacked to create adjacent air flow passages

– Operation• Two air streams pass in close

proximity without mixing• Sensible energy is transferred

through plates

Heat Recovery

• Flat Plate Heat Exchangers

• Advantages:– Low maintenance

• No moving parts• Wider air passages

– Reduced fouling risk– Lower pressure drop

– Higher efficiency than heat pipe– Less expensive than pipes, wheels– Consistent performance over time– Easy to clean and inspect

• Disadvantages:– Lower efficiency than heat wheel– Sensible energy transfer only

Heat Recovery

CUSTOM ERU W/ FLAT PLATE HEAT EXCHANGERS

Return Air Supply Air

Outside Air

Filter

Heat Pump Coil

Exhaust fanFlat plate HX

Filter

Side Elevation100”h x 84”w x 195”l

Compressors

Heat Recovery

CUSTOM ERU W/ FLAT PLATE HEAT EXCHANGERS

Heat Recovery

• Enthalpy Wheel– Variety of Sizes For Different

Recovery Capacity– Frost Control and Economizer

Options– Aluminum or Synthetic Construction

• Advantages:– Higher efficiencies (70-80%) than pipes or plates– Latent transfer capability

• Disadvantages:– Higher maintenance– Higher risk of fouling– Odors/other contaminants can be reintroduced to the space (especially

nicotine)– Particulate matter can be reintroduced to the space– Due to leakage/purge, fans must move 10-25% more air

Heat Recovery

• Enthalpy Wheel

Heat Recovery

• Heat Recovery Coils (Run Around Loop)• Two coils are piped in a loop

– One coil in cold air stream– One coil in warm air stream

• Liquid coolant circulated with pump between coils

• Advantages:– Supply and exhaust air stream need

not be together– No possibility of air streams to cross

contaminate

• Disadvantages:– Lower efficiency than pipes, plates, wheels– Higher total costs– Pump consumes energy– Glycol required to prevent freezing– High FPI required to achieve moderate efficiency

• Higher pressure drops• Prone to fouling

Heat Recovery

• Heat Recovery Coils (Run Around Loop)

• Example:– 21,000 CFM ERU– Brought into building through freight elevator– Fit into freight elevator - Max dimensions of 76”H x 76”D x

36”W– Split into 10 pieces and 2 remote condensing sections– Run around coil for energy recovery– 4 circuit, 8 stage, 128 ton water cooled condenser– HW heating

Heat Recovery

• Heat Recovery Coils (Run Around Loop)

Heat Recovery

• Heat Pipes– Refrigerant sealed in finned tube coil

– Coil split between warm and cold air streams

– Operation

• Refrigerant evaporates and condenses to transfer energy

Warm air is cooled by evaporating

refrigerant

Cold air is warmed by condensing refrigerant

Sealed tube,tilted filled with refrigerant

Liquid refrigerant is evaporated by the

warm air

Condensed liquid flows back to warm side

Vaporous refrigerant is condensed by the cold air

Heat Recovery

• Heat Pipes

• Advantages:– Side-by-side air flows (better in certain applications)

• Disadvantages:– Uses refrigerants

• Possibility of refrigerant leakage– Tight fin spacing

• Higher pressure drops• Higher risk of fouling

– Lower relative efficiency than wheels and plates– Sensible energy transfer only– More expensive than plates, comparable cost to wheels

Heat Recovery

Heat RecoveryDesigned To Condition And Deliver Fresh Air to Either The Space Or The Intake of A Conventional Air Handler

LASER-1:

Heat RecoveryLASER-1:

Heat RecoveryHave An Exhaust Air Blower And Additional Heat Exchanger For Energy Recovery From Exhaust Airstreams

LASER-2:

Heat RecoveryLASER-2:

Heat RecoveryGrinnell:

Air Handling


– Custom Units



– Desiccant Units

• Pool consultants, owners, and design engineers experience problems with: – Rotting buildings, structural members– Sick swimmers– Odors– Inability to control water chemistry– Complicated systems for owners to operate

Natatorium Units

• The main causes of first four problems have been identified as:

– Insufficient outside (ventilation) air– Ineffective airflow distribution

Result: Chloramines buildup

Natatorium Units

• Maximized Outdoor Air

• Natural Humidity Control

• Improved Indoor Air Quality

• Increased Natatorium Life

• Decreased Costs• Lower Initial Cost• Lower Operating Cost• Lower Maintenance Cost

Natatorium Units

Natatorium Units

• Dehumidify natatorium with outside air up to approx. 55–60F dewpoint

• Provide 25% to 50% O/A.

• Use aux. cooling only when O/A dewpoint above 55-60F.

• Use heat recovery to minimize operating costs.

NDHU

Natatorium Units

NDHU

Natatorium Units

Air Handling

• Air Handling Systems– Modular Units

– Custom Units



– Desiccant Units

Concepts and Designs, Inc. (CDI)

• Ideal For Applications Requiring Dew Point Temperatures of 45oF Or Lower

• Applications Include: Ice Rinks, Hospital Operating Rooms, Libraries and Archival Storage, Museums, Food Processing Plants & Any Building Requiring Very Dry Air

• Specializes in 100% O/A Projects

• Offers Indirect and Direct Fired Natural Gas, Steam or Electric Reactivation

• Quick Ship Capabilities

Desiccant Units

Desiccant Units

1,000 CFM

50,000 CFM

12,000 CFM

Dessicant Units

Desiccant Units

Dessicant Units

Engineering Focus





Boiler Plants

• Housed In Custom Fabricated Double Wall Enclosures Suitable for Extreme Weather

• Factory Built Always Costs Less Than Field Built

• Steam Boilers Or Hot Water Boilers Are Packaged Together With All The Necessary Equipment, Including Breaching and Stacks

Chiller Plants• Fast Turn-Around On Quality Designs

• Housed In Custom Fabricated Double Wall Enclosures Suitable for Extreme Weather

• Factory Built Always Costs Less Than Field Built

• Chiller Plants Include Water or Air Cooled Chillers, Pumps, Cooling Towers, Piping, Valves, and Hydronic Specialties

• Packages are pre-wired with electrical switchgear; drives and control systems

$420K vs. $650K

540 Tons

0.58 kW/Ton

Submittal in 2 weeks

Delivered in 14 weeks

Arsenal StreetChiller Plants

Arsenal StreetChiller Plants

Engineering Focus





Compressorized/Chiller Systems


– Air, Water, & Evaporative Condensed Chiller/Pump Packages

– Modular Chiller Systems

Condensing Units/Chillers• Anything You Want-Compressorized

• Systems Up To 500 Tons

• Chiller/Pump Packages

• Flexible And Potentially Smaller Footprints

• Low Sound Chillers (Low RPM Fans and Enclosed Compressors)

• Low Ambient Chillers For Reliable Year Round Chiller Operation

• Multiple Flexible Compressor Circuits For Redundancy Or Loading Matching

• Process Temperatures (High & Low)

CHILLER & PUMPING PACKAGE

Condensing Units/Chillers

Evaporative Condensed Chillers


Air Evap Components

240 compressor HP (16) 2hp 28” Propeller fans

186000 CFM 32 fan HP

Total HP = 272 Performance

204 Tons 123°F CT Comp EER = 10.4, Unit EER=9.2 Unit MCA = 469 amps

@460/60/3 Max fuse = 600 amps

Foot print = 96W x 264L x 100H LwA = 107 dBA

Components 220 compressor HP (1) 10hp fan motor

32900 CFM (1) 2hp spray pump Total HP = 232

Performance 207 tons 102°F CT Comp EER = 16, Unit EER=14 Unit MCA = 304 amps

@460/60/3 Max fuse = 400 amps

Foot print = 140W x 204 x 117 LwA = 93 dBA


Higher Efficiencies LEED, ASHRAE 90.1

Reliable Operation Less Total HP, Fewer Motors, Less Air

Lower kW Levels

Lower Amp Draw

Easily Integrated Controls and Pumps

Benefits of Evaporative Condensed Chillers


Air Cooled Chiller with Waterside Economizer


Evaporative Chiller w/ Wintertime Full Capacity Operation


Multiple / Independent Refrigerant Circuits


Compressorized/Chiller Systems


– Air, Water, & Evaporative Condensed Chiller/Pump Packages

– Modular Chiller Systems

Modular Chillers• Systems Up To 1000 GPM

• Redundancy

• Space Efficiency

• Perfect For Variable Primary Flow

• Retrofit Applications

• Superior Part Load Operation

• Small Foot Print– 44L X 34W X 79H– Modules Fit In An Elevator

• Sized In 30, 50, & 65 Ton Modules

• Can combine different size modules

• Minimum 15 Tons • Max approx. 300 Tons (2 Compressors Per Module)

• Application Example:– Data Centers

Modular Chillers

Six 65 Ton Chillers, One Operating @ 50 tonsvs.

One 300 Ton Screw Compressor Operating @ 50 tons

The Benefits Of Total Redundancy

Modular Chillers

Modular Chillers

• .71 KW/TON @ FULL LOAD

• .57 KW / TON @ PART LOAD IPLV

• UNLOADS DOWN TO 5% CAPACITY

• Saves $$, Space, Installation, Piping

• Ideal for phased construction

• .59 KW / TON @ FULL LOAD

• 0.5 KW / TON @ PART LOAD IPLV

• UNLOADS DOWN TO 10% OF CAPACITY

ClimaCool Modular Centrifugal

Modular Chillers

Engineering Focus





Variable Frequency DrivesEMERSON (SAFTRONICS)

• 1HP to 800HP Range

• 6 & 18 Pulse Standard Catalog Products

• SAFLINK PC/PDA Program For Programming, Troubleshooting, And Monitoring

• Offer 208, 230, and 460 Volts

• Feature User Friendly Digital Display Systems

• Variety of Options for Customization

Humidifiers• PURE Humidifier Company

• Methods– Electric – Steam to Steam – Gas Fired Humidifiers

• Rapid Absorption (Insty-Pak)

• Microprocessor Control Systems

• Stainless Steel All-Welded Construction– Eliminate Parts that Require Maintenance

Fans/Lab ExhaustPLASTICAIR

VENTURI Fume Hood Exhaust Systems

FRP Fans

Perchloric Hood Exhaust

SKYPLUME Generation II (G2)Tested To Provide Velocity ProfileDesigned To Withstand Downwash Up To 41 MPHConstructed Entirely Of UV Stable FRP, Will Never Rust

Sound Attenuators

Commercial Acoustics• Rectangular, Circular, Non-

erosive, Industrial, and Axial Fan Silencers

• Designed to minimize pressure loss in the air stream

• Offer silencers that prevent the growth and spread of bacterial particles

• Offer static regain systems

Precision & Spot Cooling

UNITED COOL AIR Small Tonnage W/

Application Flexibility

Easy Installation

Wide Variety Of Commercial & Industrial Applications

High Cooling Capacity To Size Ratio for Optimizing Floor Space

Reduced Ducting Costs

Precision & Spot Cooling

Additional Information

HTS Engineering, Inc.3 Centennial DrivePeabody, MA 01960(978) 977-9911 (978) 977-9941 fax

hts engineering company presentation by evan miller

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