Classification and advantages and disadvantages of commonly ...

What are the classification and advantages and disadvantages of chillers? Let us take a look together today.

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1. Various classification methods of chillers
1. According to condenser cooling method: water-cooled chiller and group air-cooled water chiller.
2. According to the refrigerant load: water-cooled chiller, brine chiller, glycol chiller.
3. According to the compressor form: piston chiller, screw chiller and centrifugal chiller.
4. According to the form of energy utilization: single cold heat pump type, heat recovery type and single cold ice storage dual function type
5. According to the cold water outlet temperature: air-conditioning type (7 degrees, 10 degrees, 13 degrees, 15 degrees) and low temperature type (-5 degrees to -30 degrees).
6. According to the sealing method: open, semi-enclosed, and fully enclosed.
7. By fuel type: oil type (diesel, heavy oil) and gas type (kerosene, natural gas).
8. Different according to energy compensation: power compensation (compression type) and thermal compensation (absorption type).
9. According to refrigerant: R22R123, R134a
10. According to different heat sources (absorption type): hot water type, steam type, direct combustion type.

2. The advantages and disadvantages of various chillers

Piston chiller
advantage:
1. The material is simple, general metal materials can be used, the processing is easy, and the cost is low.
2. The system device is simple, easy to lubricate, and does not require an exhaust device.
3. With multiple heads, high-speed multi-cylinders, performance can be improved.
Disadvantages:
1. There are many spare parts, many wearing parts, complicated and frequent maintenance, and high maintenance cost.
2. The compression ratio is low, and the cooling capacity of a single unit is small.
3. The adjustment performance of the single machine head is poor under partial load, and the unloading adjustment can not be stepless adjustment.
4. It belongs to up and down reciprocating motion, and the vibration is large.
5. Large weight index per unit cooling capacity

Screw chiller
advantage:
1. Simple structure, few moving parts, few wearing parts, only 1/10 of the piston type, low failure rate and long life.
2. Smooth circular motion, no “surging” phenomenon during low load operation, low noise and low vibration.
3. The compression ratio can be as high as 20, and the EER value is high.
4. Convenient adjustment, stepless adjustment within the range of 10%~100%, high efficiency under partial load, and significant power saving.
5. Small size and light weight, it can be used as a built-up fully enclosed large-capacity unit.
6. Not sensitive to wet stroke.
7. It belongs to positive pressure operation, and there is no problem of external air intrusion and corrosion.
Disadvantages:
1. The price is higher than the piston type.
2. The capacity of single machine is smaller than that of centrifugal type, and the speed is lower than that of centrifugal type.
3. The lubricating oil system is more complicated and consumes a lot of fuel.
4. The noise of large-capacity unit is higher than that of centrifugal type.
5. High processing precision and assembly precision are required.

Modular chiller
advantage:
1. It is an improved type of piston chiller and screw chiller. It is composed of multiple chillers.
2. The unit is small in size, light in weight, low in height and small in area.
3. Simple installation, no need to reserve installation holes, convenient on-site assembly, especially suitable for renovation projects.
Disadvantages:
1. The price is more expensive.
2. The number of modules should not exceed 8 in general.

Water source heat pump unit
advantage:
1. Save energy and recover heat when running in winter.
2. There is no need for refrigerating machine room, no big ventilation ducts and circulating water pipes, and no heat preservation, reducing the cost.
3. Easy to measure.
4. Convenient installation and low maintenance cost.
5. Flexible application and convenient adjustment.
Disadvantages:
1. The fresh air cannot be used to the fullest extent during the transition season.
2. The unit is noisy.
3. Most of the units are installed in the ceiling, which brings a certain degree of difficulty to maintenance

Chiller unit (natural refrigerant)

This is a chilled water circulation type refrigeration system that creates, supplies, and circulates water with a temperature of 0.5°C (33℉) to the refrigeration process at a food factory. It uses natural and environmentally friendly ammonia as a refrigerant. The amount used to fill the system is kept to a minimum, and the unit is constructed in a manner that prevents leakage outside of the unit or on the chilled water side. A large-bore SUS pipe is used for the chilled water pipe, which makes clogging difficult while also offering excellent cleaning characteristics.

SPECIFICATIONS

• Cooling capacity: MZCF-100 98kW (27.9TR), MCZ-200 197kW (56.7TR)
• Supplies chilled water from 0.5 to 2°C (33 to 36℉)
• Refrigerant: Ammonia (R717)

WHERE TO USE

• Poultry processing plants
• Food processing plants

mCHILLER FUGU

The mCHILLER FUGU is a Mayekawa plug-and-play standard solution with a strong focus on energy consumption and the perfect balance between durability and simplicity. The compact mCHILLER FUGU is designed for easy and simple installation and a long lifespan. It utilizes a natural refrigerant, ammonia, for the highest energy efficiency, and the best sustainability. With an ammonia charge as low as 55 kg (122 lbs), the mCHILLER FUGU achieves a high level of safety.
The mCHILLER FUGU comes with a FAT Report (Factory Acceptance Test) that is performed at our factory. The FAT includes a full load thermal performance test, thermal imaging of key points, and vibration measurements.

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SPECIFICATIONS

• Cooling capacity : 604 to kW (172 to 370TR) at 7°C (44℉) outlet/12°C (53℉) inlet
• Secondary media outlet from -12 to 12°C (10 to 53℉)
• Refrigerant: Ammonia (R717)
• Refrigerant charge: 55 to 92 kg (122 to 203 lbs)

WHERE TO USE

• Breweries and wineries
• Diaries and food processing
• Industrial processes
• Data centers
• Building comfort cooling

Learn more about mCHILLER

mCHILLER TAKA

The new mCHILLER TAKA is a standard air-cooled ammonia chiller with a strong focus on energy consumption and safety. The perfect balance between high efficiency, durability, and simplicity.
This chiller is designed to meet the needs of semi-industrial and commercial markets such as data centers, process cooling, HVAC, etc. Depending on the application, the chillers will cover 80-300 kW as nominal refrigeration capacity.
With the mCHILLER TAKA, you are getting a low-charge ammonia chiller tailor-made as the perfect alternative to synthetic refrigerant chillers.

SPECIFICATIONS

• Cooling capacity :121 to 242 kW (34 to 69TR) at 7°C (44℉) outlet/12°C (53℉) inlet
• Secondary media outlet from -12 to 12°C (10 to 53℉)
• Refrigerant: Ammonia (R717)
• Refrigerant charge: 20 to 24 kg (44 to 53 lbs)

WHERE TO USE

HVAC

• Hospitals
• Hotels
• Office buildings
• Shopping Malls
• Data centers

Process cooling

• Food production
• Brewery
• Pharmaceutical production
• Dairy

Cold storage

• Slaughterhouse

Learn more about mCHILLER

Low Charge Ammonia Chiller

Low Charge Ammonia Chiller

Low Charge Ammonia Chiller

The ammonia chiller system with microchannel condenser technology is the result of the extensive experience and technical foundation that characterize Mayekawa's reputation. Microchannel ammonia chiller was developed to meet real market needs, and this unit is different from its predecessors due to its compact structure. The plate type evaporator and microchannel condenser allow for exponential savings while cooling fluid(50% lower refrigerant charge); therefore, we have a strong, compact, safe and easy-to-use unit that also allows considerable equipment cost reduction.

SPECIFICATIONS

• Capacity : 140 to 263kW (40 to 75TR)
• Supplies chilled water from 7 to 12°C (44 to 53℉)
• Refrigerant: Ammonia (R717)

WHERE TO USE

• Beverages
• Winery
• Dairy products
• Food
• Chemical/Petrochemical
• Pharmaceutical

NewTon i

A brine chiller with all the benefits of the NewTon series, including high efficiency, safety, and environmental friendliness. It is safe because the brine solution cooled with ammonia is sent to the process side. The amount of ammonia used to fill the unit is kept to a minimum, and it uses a shell and plate heat exchanger and a screw compressor equipped with a semi-hermetic IPM motor that is leak-resistant. As existing brine piping can be used, construction costs for system renewal can also be kept low.
・NewTon B
Standard type NewTon for process cooling.
・NewTon i
A NewTon unit specially designed for ice pop hardening. The refrigeration system is equipped with a shell and plate evaporator that uses corrosion-resistant titanium in the heat exchange part that comes into contact with the aqueous calcium chloride solution.

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SPECIFICATIONS

• NewTon i
  Cooling capacity: 232.9kW (66.2TR)　*In the case of cooling water at 32 ℃(90℉)
  Brine temperature: CaCl2 -35℃ (-31℉)　
  Refrigerant: Primary Ammonia(R717), Secondary Brine(CaCl2)
  Remote monitoring service
• NewTon B
  Cooling capacity: 195.1kW (55.5TR)　*In the case of cooling water at 32 ℃(90℉)
  Brine temperature: PG supply 8 to -15℃(46 to 5℉)
  Refrigerant: Primary ammonia (R717), Secondary Enthylene glycol (EG) or propylene glycol (PG) brine
  Remote monitoring service

WHERE TO USE

• NewTon i: Ice pop manufacturing processes
• NewTon B: Process cooling