1 Multi-use Facility. 2 Occupancy – 140 persons Building Characteristics Single story 20,000...

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Multi-use Facility

2

Multi-use Facility

Occupancy – 140 personsBuilding Characteristics

• Single story• 20,000 square feet (250’ x 80’)• Standard construction

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What we will cover:

• Types of hydronic heating systems

• Closed loop perimeter heating• Closed loop radiant systems• Water source heat pumps• Ground source heat pumps

• Piping methods• Constant speed/constant volume• Constant speed/variable volume• Variable speed/variable volume

• Retrofit market• Significant opportunities!

• Magna3 advantages

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HW Closed Loop Perimeter/ Fan Coil System

Optional Variable Speed Components

∆P Sensor

ModulatingControl Valve (typ.)

Secondary Pump

Common Pipe

2-way or Two Position Valve (typ.)

Bo

iler

Primary Pumps

Expansion TankAir Separator

Balance Valve (typ.)

Bo

iler

Load (typ.)

Manual balance valve 3-way control valve

2-way control valveAir separator

System piping components

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System piping components

Fan coil VAV box

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HW Closed Loop Radiant Floor/Snow Melt System

Radiant Floor orSnow Melt Panels

P1P2

SecondaryPump

MixingValve

Primary PumpsP1 & P2*

Redundant*


Common Pipe

8


9


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Heat Pumps

60ºF HPWS

53ºF HPWR

Heat Pump

160ºF HHWR

180ºF HHWS

53ºF CHWR

Fan Coil Unit

45ºF CHWS

Air

Air

60ºF HPWS

67ºF HPWR

60

ºF H

PW

R

60

ºF H

PW

SHeat Pump

Cooling

Heating

Heat Pump Operation

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53ºF HPWR

Fan Air

60ºF HPWS

Heating

Water to Refrigerant Heat Exchanger

Compressor

Reversing Valve

Refrigerant Coil

ExpansionValve

RefrigerantPiping

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Heat Pumps

• Types• Water source

• Boiler and chiller• Ground source

• Bore field / pond loop / well• Hybrid

• A ground source plus supplemental heating or cooling

Closed Circuit Cooling Tower

WSHP

BufferTank

( Optional ))

Compression Tank

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Water Source Heat Pump (WSHP)

Bo

iler

WSHP

WSHP WSHP

WSHP

Make-upWater

Primary PumpsP1 & P2*

Redundant*


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WSHP Components

Cooling Towers

Boilers

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Ground Source Heat Pump (GSHP)

Bore Field

GSHP

BufferTank

( Optional )

Compression Tank

GSHP

GSHP GSHP

GSHP

Make-upWater

HP Loop PumpsP1 & P2*

Redundant*


Bore Field Loop Pump

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GSHP

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Hybrid Ground Source Heat Pump

Bore Field

GSHP

BufferTank

( Optional )

Compression Tank

GSHP

GSHP GSHP

GSHP

Make-upWater

HP Loop PumpsP1 & P2*

Redundant*


Bore Field Loop Pump

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Hydronic Piping SystemsTypes:

• Constant Speed/Constant Volume (CS/CV)• Piping & equipment requirements• Deficiencies • Energy usage

• Constant Speed/Variable Volume (CS/VV)• Piping & equipment requirements• Advantages• Energy usage

• Variable Speed/Variable Volume (VS/VV)• Piping & equipment requirements• Advantages• Energy usage

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CS/CV Piping System

3-wayValve

Load

Balance Valve (Typ.)


Bo

iler

2*

Bo

iler

1

Primary Pumps P1 & P2*

* Redundant

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CS/CV System Deficiencies

• High return water temperatures• Robs hot water from other coils at part loaded conditions

• Increases flow• Adds additional boilers on line• Boiler performance is reduced

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CS/CV System

• Load for Multi-use Facility: Chicago, IL• Plot load profile • Select pump for 108 gpm @ 36 ft

40

35

30

25

20

15

10

5

00 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 320 340Flow (gpm)

Head (

ft)

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108 gpm @ 36 ft

CS/CV Pump

97%

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Pump Energy Consumption - CS/CV

00.250.5

0.751

1.25

1.5

kWHr

Pump Energy Consumption

CS/CV

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CS/VV HW Piping Systems

Primary Pumps

P1 & P2*

*Redundant

Return

Supply

Secondary Pumps P1 & P2*

Bo

iler

1

Bo

iler

2*


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CS/VV Pumping Systems

• Add secondary pumps• Add common pipe• Add system bypass• Add 2-way valves• Eliminate 3-way valves…or

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CS/VV Pumping Systems

• Eliminate 3-way valves• Disable 3-way valves

• Shut bypass valve• Disconnect bypass pipe• Actuator may be

undersized for 2-way operation

• Does this make $ense?

40

35

30

25

20

15

10

5

00 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 320 340Flow (gpm)

Head (

ft)

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108 gpm @ 36 ft

CS/VV Pump Curve

97%

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CS/VV Advantages

• Lower return water temperatures• Minimizes flow to coils• Decreases secondary flow• Reduces boilers on line• Boiler performance is increased• Ease of system operation• Energy savings• Preferred piping method

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Pump Energy Consumption - CS/VV

0% L

oad

20%

Loa

d

40%

Loa

d

60%

Loa

d

80%

Loa

d

100%

Loa

d

00.250.5

0.751

1.251.5

kWHr


CS/CV

CS/VV

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VS/VV Pumping

Add:• Variable frequency drive (VFD)• Programmable logic controller (PLC)• Differential pressure sensors (∆P)• Direct digital controls (DDC)

Save 75% AOC versus CS/CV!

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VS/VV Hot Water Systems

Secondary PumpsVSP1 & VSP2*

ΔPSensor

Air SeparatorExpansion Tank

*Redundant Return

SupplyB

oile

r 1

Bo

iler

2*

VS PumpsAnd Controls

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Pump Curve Summary

CS/CV

108 gpm @ 36 ft

CS/VV VS/VV

108 gpm @ 36 ft 108 gpm @ 36 ft

54 gpm @ 37 ft54 gpm @ 9 ft

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108 gpm @ 36 ft

Flow (gpm)

Head (

ft)

0 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 320 340

40

35

30

25

20

15

10

5

0

VS/VV Pump Curve

Magna3 100-120

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VS/VV Advantages

• Optimizes return water temperatures• Optimizes flow to coils• Decreases secondary flow• Reduces boilers on line• Boiler performance is increased• Ease of system operation• Optimum energy savings

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Pump Energy Consumption - VS/VV

0% L

oad

20%

Loa

d

40%

Loa

d

60%

Loa

d

80%

Loa

d

100%

Loa

d

00.250.5

0.751

1.251.5

kWHr


CS/CV

CS/VV

VS/VV

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VS/VV Advantages

Cost effective design• Primary-secondary pumping• Common pipe design • 2-way valve operation

Save 75% of pumping energy over CS/CV systems

Save 50% of pumping energy over CS/VV systems

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Additional System Savings

• Additional sources of energy savings• Boiler operation• ΔT optimization

• Sources of first cost savings• Pump sizing • Boiler sizing• Valve sizing• Pipe sizing

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VS/VV Pumping

Add:• Variable frequency drive (VFD)• Programmable logic controller (PLC)• Differential pressure sensors (∆P)• Direct digital controls (DDC)

Or add…

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Demand More

Magna3!

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HW Systems w/ Magna3

Secondary PumpsVSP1 & VSP2

Primary PumpsMP1 & MP2*

*Redundant

Return

Supply

Bo

iler

1

Bo

iler

2*


Magna3VS Pumps

With Controls

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VS/VV Retrofit Opportunities

Converting CS/CV to VS/VV • Steam systems• 3 pipe hot/chilled water systems

• One pipe hot water systems• 3-way valve hot water systems

• Uncontrolled radiant systems

• Over-sized boiler pumps

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VS/VV Retrofit Opportunities

Converting CS/VV to VS/VV • CS 2-way valve HW systems• CS three pipe systems• Systems with poor ΔT control

• Systems with over-sized pumps

• Systems with local ΔP sensors

• Systems with single VS pumps

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Demand More

Magna3: Features & Benefits

1 Multi-use Facility. 2 Occupancy – 140 persons Building Characteristics Single story 20,000...

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