Sustainability of CO2 technology and the role of control systems

50 %
50 %
Information about Sustainability of CO2 technology and the role of control systems

Published on September 6, 2016

Author: CAREL_group

Source: slideshare.net

1. Sustainability of CO2 technology and the role of control systems Diego Malimpensa 07th November 2012

2. 1. Background 2. Technology evolution 3. Upcoming innovations & trends Agenda

3. Background late 90s The Late 1990s Developments in the use of brines for both LT & MT Systems in Nordic countries

4. The early 2000s Introductions of cascade systems R xxx /LT CO2 Background late 90s early 2000s

5. Today The most promising system Transcritical Booster DX One Refrigerant Background late 90s early 2000s … today

6. Main barriers 1. Training & Know how 2. Technology & Safeties 3. Psychology (perceptions, acceptance) Control systems must MAKE IT EASIER, it’s our role. Ref. 2012 Shecco Natural refrigerant guide

7. In the past: Standard HFC systems • Consolidated knowledge • Simple and well known technology • Simple tools and maintenance procedures • Electromechanical backup • Manual management in case of problems Technology evolution MAIN TARGET: FOOD TEMPERATURE even with no efficiency

8. CO2 booster DX transcritical systems: service/maintenance break trough • More relevant information to consider • Electronic controls are the brain of the system • Service and maintenance tools need to reflect latest technological improvements Technology evolution Industries have to consider • Easy access to all relevant information • Easy understanding of working conditions • Guided and flexible procedures • Built in safeties • Predictive alarms • System integration MAIN TARGET: SYSTEM EFFICIENCY preserving food quality Gas cooler pressure MT suction pressure Gas cooler outlet temperature HPV valve opening Receiver pressure LT suction pressure RPV valve opening

9. Human Machine Interfaces Fast growing and technological improvements in consumer applications Large scale availablity of: • Widespread broadband connectivity • Cloud computing • High level user terminals (smarthpones, tablet, …) Conceal complexity behind HVAC/R industries need to ride this trend • General overview, detailed zooms • Added value informations, user profiles differentiation • Improve service levels through faster remote troubleshooting • No hardware cost increase 1990 2012 11,5 barg 12 36,1 28 86 62,5 26,2 barg 2

10. Integration 3 controllers: ▪ Suction MT ▪ Suction LT ▪ High stage 2 controllers: ▪ Suction MT & high stage ▪ Suction LT Integrated solutions All in one • Capital costs reduction • Installation costs and complexity reduction • Faster commissioning/maintenance • Improved interaction and synchronization between components • Increased safeties and backup procedures • Easier understanding of working conditions

11. Turkey Know how diffusion Good basic knowledge is needed: dedicated training is required European know how and expertise need to be exported to help CO2 deployment in foreign countries. 2009: first subcritical cascade r134a/CO2 system 2012: first transcritical booster CO2 system Up to now: 3 subcritical / 1 transcritical CO2 plants

12. Know how diffusion Brazil South Korea 2009: first subcritical cascade r134a/CO2 system 2012: first transcritical booster CO2 system Up to now: 9 subcritical/ 1 transcritical CO2 plants 2008: first subcritical cascade r134a/CO2 system 2011: first subcritical pumped r134a/CO2 system Up to now: 5 subcritical/pumped r134a/CO2 plants

13. Upcoming innovations & trends

14. Convenience Stores Good scale production of medium/large stores • Continuous improvements • Component availability • Cost reductions • Growing portfolio • Introduction of small and cost effective solutions Market is ready to move the focus to a new niche for CO2 Convenience Stores • Huge numbers • Energy efficiency • ROI • Safeties

15. • Consolidate technology in northern European countries • Attention is shifting to southern European countries • Target: further decrease the acceptable lattitude Tests are continuing in warmer climates countries, assessing and comparing different solutions One potential solution: Evaporative cooling system • Simple • No invading • Cost effective • Integration with system controller (energy saving or safety activation) Warmer climates

16. Warmer climates – Istanbul case study Activation threshold 28°C outdoor temp 0 5 10 15 20 25 30 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec [°C] outdoor temp. Ref. ASHRAE Maximum temp decrease :15°C Annual average temp:14.5°C

17. Warmer climates – Istanbul case study Activation threshold 28°C outdoor temp 0 5 10 15 20 25 30 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec [°C] outdoor temp. gas cooler temp. Ref. ASHRAE Maximum temp decrease :15°C Annual average temp:14.5°C Perceived average temp: 13.8°C

18. Warmer climates – Istanbul case study 0 5000 10000 15000 20000 25000 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec [kWh] Booster CO2 w/o evap cooling Booster CO2 with evap cooling

19. Warmer climates – Istanbul case study 0 5000 10000 15000 20000 25000 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec [kWh] Booster CO2 w/o evap cooling Booster CO2 with evap cooling double r404 MT/LT

20. 80% 82% 84% 86% 88% 90% 92% 94% 96% 98% 100% Booster CO2 w/o evap cooling Booster CO2 with evap cooling double r404 MT/LT 99% 95% 100% Warmer climates – Istanbul case study

21. Conclusions • Conceal complexity behind • HMI • Integrated solutions • Exporting knowledge • New opportunities • Convenience stores • Warmer climates

Add a comment