05 Croatian Meet Industry Using Ammonia Vladimir Soldo

University of ZagrebFaculty of Mechanical Engineering and Naval Architecture

JOINT MEETING OF THE REGIONAL OZONE NETWORKSFOR EUROPE & CENTRAL ASIA (ECA) AND SOUTH ASIA (SA),

ISTANBUL, TURKEY, 26-30 APRIL 2010

PIK Vrbovec Croatia:

Meat industry using ammonia

Vladimir SOLDONational consultant in the project HPMP in Croatia

22 Joint meeting of the Regional Ozone Networks for Europe & Central and South Asia, Istanbul, Turkey, April 2010

ODS phase out project in Croatia

Faculty of Mechanical Engineering and Naval Architecture (FMENA) University of Zagreb has been the national consultant in many phase out projects in Croatia (RMP, TPMP, Chiller demonstration projects, HPMP) since 1999.

FMENA is the national training center in Croatia (RMP, TPMP) with more than 2200 service technicians trained and certified.

Project leader: prof.dr.sc. Tonko Ćurko

33

C O N T E N T

1. INTRODUCTION

2. DIRECT AND INDIRECT AMMONIA SYSTEMS

3. COLD STORES

4. SAFE OPERATION

5. CONCLUSION

Joint meeting of the Regional Ozone Networks for Europe & Central and South Asia, Istanbul, Turkey, April 2010

R22R141b

protocol

(R12)

HFCNHMontreal

CO

HCFC

3

HC

(CFC)

2

44

1. INTRODUCTION


Meat industry PIK Vrbovec (established in 1938) opened the most modern production plants in the south-east of Europe in 2008.

The old factory used ammonia, but the system had the charging of about 30 tons.

New plants after the reconstruction of the old cold stores and refrigerating systems and the installation of new plants with the total cooling area of 25.000 m2, has charging of about 20 tons. The total cooling capacity of plants is 10 MW.

For the freezing cold stores and tunnels a direct ammonia refrigerating system is used.

For production cold stores, where people work an indirect ammonia refrigerating system with four chillers is used.

55

DIRECT SYSTEMS FOR FREEZING COLD STORES AND TUNNELS

System schematic

Charging of ammonia- 14.9 tons

-10°C

-35°C

-45°C

Receiver NH3(-10/+35°C)

(-35/-10°C)

(-45/-10°C)

= 800 kW, P = 250 kW - 4xo el

= 440 kW, P = 132 kW - 2xo el

= 300 kW, P = 132 kW - 2xo el

-cool. cap. 600 kWFreezing tunnels

600 kW

21 3

65

7 8

Cold stores

880 kW

3200 kW4

Evaporativecondenser

880 kW


66

Indirect cooling system - chillers


Secondary coolant is a 35 % mixture of propylene glycol and water

Charging per chiller is 200 kg of ammonia

Receiver NH3

Evaporativecondenser

-13°C-5 °C-10°C

-13°C

-13°C

(-13/+35°C)

= 1040 kWo

P = 355 kWel

-13°C (-13/+35°C)

= 1040 kWoP = 355 kWel

-5 °C-10°C

-5 °C-10°C

-5 °C-10°C

77

Production cold stores with indirect cooling system This is a fully automated production line.


88

Distribution of cooled air

Rashladne komore

Discharge distribution socks


99

The plan of rail layout.The meat is hung on hooks onroller carriers.

Rashladne komore


1010

Freezing plant


1111 Joint meeting of the Regional Ozone Networks for Europe & Central and South Asia, Istanbul, Turkey, April 2010

MACHINERY ROOM

Oil is cooled by water

Screw compressors

1212

Safety system – a very important part of plant .


SAFE OPERATION

All connections and valves of the ammonia distribution system are in the technical hall, outside of cold stores.

In case of ammonia leakage (200 ppm) water sprays are used and the ventilation system is turned on. The absorbed ammonia is stored in special tanks.

1313

Students’ technical excursionA common practise of the faculty (FMENA) is to take students for study visit of

refrigerating plants. The visit was very useful to students because they could see how modern systems using natural refrigerant operate.

Study visit , PIK Vrbovec, 29 May 2009


1414

CONCLUSION


For the past few years with installation and reconstruction under way, production has been increased by 3 times, and the total charging of ammonia has decreased by one third.

Ammonia as a natural refrigerant is the first choice in industry refrigerating systems

Ammonia system in meat industry PIK Vrbovec with the charging of almost 20 tons is a sample application with safe and efficient operation.

In the reconstruction of old cold stores and refrigerating systems in meat industry PIK Vrbovec and in the installation of new plants with a total cooling area of 25.000 m2 all new standards have been applied .


Acknowledgments

The author would like to express his gratitude to Mr. Bojan Sivric, the engineer in charge carrying out of installation works, from the company Tepescoand the manager in the PIK Vrbovec Mr. Luka Curko for their valuable help.



Thank You for Your Attention

Vladimir Soldo, Ph.D.University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture

Ivana Lucica 5, Zagreb, Croatia, www.fsb.hr

E-mail: [email protected]


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05 Croatian Meet Industry Using Ammonia Vladimir Soldo

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