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EWTP-MBYNN. Air-cooled Heat Recovery. EWTP-MBYNN. Air-cooled Heat Recovery. Contents. Concept Equipment Overview Capacity Range Operation Range Specifications Practical Examples & Reference. Return. Return. Heating Load. Cooling Load. 12 0 C. 40 0 C. 45 0 C. 7 0 C.

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Presentation Transcript
slide1

EWTP-MBYNN

Air-cooled Heat Recovery

Applied Systems Sales

slide2

EWTP-MBYNN

Air-cooled Heat Recovery

Contents

Concept

Equipment Overview

Capacity Range

Operation Range

Specifications

Practical Examples & Reference

Applied Systems Sales

a heat recovery concept

Return

Return

Heating

Load

Cooling

Load

120C

400C

450C

70C

Supply

Supply

A. Heat Recovery Concept
  • Criteria
  • Hot water demand must be great enough to justify cost
  • High enough useful waste heat temperature

Applied Systems Sales

b equipment overview

Single Circuit (1 Compressor)

Double Circuit (2 Compressors)

B. Equipment Overview

Heat Recovery Chillers:

EWTP400-540MBYNN

EWTP110-160MBYNN

EWTP200-340MBYNN

  • Daikin stepless single screw compressor
  • All components optimized for use with R-407C
  • Air heat exchanger: Cross fin coils / Hi-X tubes and PE waffle louvre fins
  • Water heat exchanger: Brazed plate evaporator & heat recovery exchanger
  • Double refrigeration circuit (from 400kW)

Applied Systems Sales

c capacity range
C. Capacity Range

EWTP-MBYNN

Model 110 140 160 200 280 340 400 460 540

CC kW 107 138 158 191 274 335 379 449 520

CCHR kW 98 126 144 171 251 311 337 401 465

HCHR kW 116 148 176 208 301 377 407 434 441

HP 40 50 60 80 100 120 140 160 200

Single circuit

(1 compressor)

Double circuit

(2 compressors)

Applied Systems Sales

d operation range cooling
D. Operation Range - Cooling

Ambient (°C )

50

LWE to -10°C

43

40

39

36

30

20

Continuous

Operation Area

Pull-Down

Area

On special request

10

0

Low Ambient to -15°C

  • Protect against freezing by:
  • Evaporator heater tape (std)
  • Glycol

-10

-15

-20

Glycol

Water

LWE (°C)

-30

-5

4

16

26

-20

30

-10

0

10

20

Applied Systems Sales

e specifications

Daikin Stepless

Single Screw Compressor

2pcs Brazed Plate

Heat Exchangers

pCO2 Control Platform

E. Specifications

* See EWAP~MBY Presentation

Applied Systems Sales

e specifications heat recovery principle

Condenser

HighPressure

45oC

60oC

Hot Water Supply

Expansion

Valve

40oC

50oC

Compressor

Evaporator

Useful Heat

Compressor Discharge Gas

LowPressure

7oC

12oC

  • Partial Heat Recovery
  • (Desuperheater)
  • 25 to 35% Heat Recovery
  • High LWE upto 600C
E. Specifications – Heat Recovery Principle

OR

  • Total Heat Recovery
  • 65 to 85% Heat Recovery
  • Lower LWE of 450C

Applied Systems Sales

slide9

E. Specifications -> Construction

From Condenser

Economiser

To Condenser

Compressor

Discharge

Evaporator

Daikin Single Screw

Compressor

Heat Recovery BPHE

Applied Systems Sales

e specifications heat recovery principle1

Hot water & condensing temperature

DAIKIN Heat Recovery Chiller

Optimized condensing temperature

T (°C)

Conventional Heat Recovery

Fixed condensing temperature

Set point

Conventional Heat Recovery

Uncontrolled Hot water temp

DAIKIN Heat Recovery chiller

Controlled Hot water temp

t 0 t 1 t 2 t 3 t 4 t 5

Power input

Conventional Heat Recovery

DAIKIN Heat Recovery Chiller

PI (kW)

Saved Energy

t 0 t 1 t 2 t 3 t 4 t 5

E. Specifications – Heat Recovery Principle

Applied Systems Sales

standard with heat recovery units

Ambient temp. (°C)

15

20

25

30

35

40

0

-1

-2

-3

-4

Sound power level (dBA)

E. Specifications -> Inverter Fans

Standard with Heat Recovery units

- Stable HP control, better part load efficiency

- Smooth operation, better colour of sound

- Linear sound reduction in function of ambient

Sound reduction in function of ambient temperature

Further Reduction of

- 3dBa

Applied Systems Sales

self adaptive control to run at optimized cooling capacity heat recovery ratio

Feedback

Additional Heating Source

OR

Gas, Oil, … Electricity

Self adaptive control to run at optimized cooling capacity / Heat recovery ratio

E. Specifications – Control Possibilities

Remote Mode Switch

Enable / Disable

PCO² Contoller

Heat recovery

Temperature Sensor

L N

A1

A2

Pump Contact

Pump

Cooling

The Load

Applied Systems Sales

optimized balancing between cc hr capacity
Optimized balancing between CC & HR capacity

E. Specifications – Optimised Control

Capacity

kW

HR Capacity

CC

19 Bar

22 Bar

High Pressure

Bar

Applied Systems Sales

e specifications installation
E. Specifications – Installation

Hot Supply

  • Boiler
  • Used during peak & off-peak periods
  • Maintains tank temperature

Cold Supply

City Mains

Stratified Hot Water

Storage

Twin Pump Set

In-Line

Boiler

  • OPHR
  • Used during off-peak
  • Assists inline heater

Applied Systems Sales

slide16

E. Specifications – DICN Control

  • Erratic Control on LWE
  • Loss of performance at terminals
  • No plant optimization to meet load
  • No defined lead or standby unit
  • No defined unit running hours

Without

Communication

=

Multiple Chillers

HR Chiller can be given priority -> increased reliability at part load

LOAD

LOAD

600C

120C

120C

120C

HR Chiller

500C

70C

70C

70C

Daikin’s Solution = DICN =

Applied Systems Sales

slide17

Example: EWTP140MBYNN

At nominal conditions: 7oC and 12oC chilled water & 35°C ambient

  • Cooling mode  fans at full speed  min condensing pressure

Cooling Capacity 138kW

Power Input 54kW

EER 2.56

  • Heat recovery mode  increased condensing  max heating capacity

Hot Water 45oC

Heating Capacity 148kW

Cooling Capacity 126kW

Power Input 47,8kW

Hot Water 60oC

Heating Capacity 60,2kW

Cooling Capacity 121kW

Power Input 51kW

F. Practical Examples

COP = 3.55

%HR = 35%

COP = 5.73

%HR = 85%

Applied Systems Sales

slide18

F. Practical Examples - Simple Payback

  • Based on:
  • Energy Consumption of 0,15€ per kWhr
  • 4hrs operation at 100% -> assume multiple chiller installation

Our Findings

  • Avg Payback of option OPHR:
  • Hot Water 40/50 42 Days or 8 weeks
  • Hot Water 50/60 102 Days or 20 weeks
  • Avg Payback of Chiller + OPHR:
  • Hot Water 40/50 1 Year
  • Hot Water 50/60 2,5 Years

Exceptional Investment for Customer!

Applied Systems Sales

slide19

New Zealand Application

Mudhouse-River Co-operative

Affiliate: Daikin Australia

Installer: Martella

3 x EUWA200MZY

1 EUWA200MZY unit produces 15,000,000 l/yr

Cooling Mode

Total Cooling = 1.5MW

HR Mode

Total Cooling = 1.4MW

Total HR = 0.8MW

Conditions

LWE = -4oC

LWC = 52-55oC

Applied Systems Sales

slide20

1. R-407C: the good choice !

2. High specifications

3. High Quality Components

4. Useful Options

Large

Air-Cooled

Heat Recovery Chillers

EWTP110~540MBY

Applied Systems Sales