Refrigeration%20cassette%20(CO2)%20>%20Pipe%20diagram

1
Central RD at Danfoss
Claus Thybo RA-DP January 2006
2
RA Growth and Innovation Drivers

• Market Development (MD)
• Mergers and Acquisitions (MA)
• Research and Development (RD)

3
Agenda
- Strategy and mission - RA-D s RD
activities - Identify future fields of
interest - The control group - Fault
detection and diagnosis
4
Central RD Staff and 2001 Mission
We contribute to RAs medium and longterm
development

• Run projects on new technologies relevant for
  RAs business areas.
• Maintain and renew a selection of RAs core
  competencies and knowledge.
• RD networking with customers, knowledge centres
  and organisations.

5
RA-D Seen as a Think Tank
Patent evaluation
Project
Studies
Idea-project transformer
Market feedback
Idea
Idea Generation
Idea
Concept
Universities
Interactionwith BUs
Confer-ences
6
and some Outcome Examples
7
Agenda
- Strategy and mission - RA-D s RD
activities - Identify future fields of
interest - The control group - Fault
detection and diagnosis
8
Activity Master Plan Stages Interaction
Conclusion of Investigation
Conclusion of Prototyping
Introduction of Product
Start of Investigation
Start of Transfer
Prototyping

Investigation
RA-D
Transfer
N1/N2
N5
Product Development
Market Introduction
BU
9
Agenda
- Strategy and mission - RA-D s RD
activities - Identify future fields of
interest - The control group - Fault
detection and diagnosis
10
Todays Technology Development Drivers
Increase of energy efficiency
Environmentally friendly technology
Reduction of cost
promising RD should be in the middle
11
Agenda
- Strategy and mission - RA-D s RD
activities - Identify future fields of
interest - The control group - Fault
detection and diagnosis
12
Scope of work - rules of the game

• Strong focus on control engineering
• We work together with international knowledge
  centers
• We are technology and application focused We
  dont take product responsibility!
• Our job is to make surveys of new control theory
  and transform promising results to prototype
  applications
• We try to work with scalable technology to
  provide technology for both low-cost and more
  complex products

13
Control Engineering tasks -what we are working
with

• Automated commissioning
• Fault detection and diagnosis
• Dynamic optimizing control
• Set-point optimization

14
Agenda
- Strategy and mission - RA-D s RD
activities - Identify future fields of
interest - The control group - Fault
detection and diagnosis
15
Fault Detection and Diagnosis in Refrigeration
Systems - A Summary of the Latest Results
Claus Thybo, M.Sc. Ph.D Danfoss A/S Central RD Refrigeration and Air-conditioning Nordborg, Denmark E-mail thybo_at_danfoss.com Roozbeh Izadi-Zamanabadi M.Sc. PhD Aalborg University Department of Control Engineering Aalborg, Denmark E-mail riz_at_control.auc.dk
16

• Objective
• To detect and diagnose the most important faults
  in a typical (European) supermarket refrigeration
  system.

17

• The approach
• Investigate a typical European supermarket
  refrigeration system
• Focus on the most important faults
• Deriving detectors by using the analytical
  redundancy
• The results
• Detection of

• Fan faults
• Frost build-up
• Flash-gas
• Condenser dirt build-up
• Internal compressor leakage

18
A Typical European Supermarket Refrigeration
System
Evaporator model
Residual
19
A Typical European Supermarket Refrigeration
System
Condenser model
Residual
20
Diagnosis
DetectorSymptom
Cause of Fault
21
Conclusion

• We have shown that we can detect and diagnose the
  most important faults in an typical European
  supermarket refrigeration system.

The first product with automatic fault diagnosis
features was released in 2004.
We are releasing more products with fault
diagnosiscapabilities as an integrated feature.
22
(No Transcript)
23
(No Transcript)
24
Detection of flash-gas
Minutes
25
Detection of frost build-up
.
.
Minutes
26
(No Transcript)