Innovative Refrigeration Systems for Your Next District Cooling Project

Air conditioning is so expensive that it is sometimes even difficult to place a figure on it. Many factors feature when you attempt to determine the cost of running an air conditioning system. Some of these are the level of service needed, amount of space being cooled and ambient air temperature. The common denominator is that reducing cost the system is a priority as providing cooling for building occupants is not an option. For its remarkable energy efficiency, district cooling has become a sustainable solution for high-density buildings. In your next project, you want to identify the likely challenges and use the best innovative refrigeration systems for maximum profitability and sustainability.

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Fig 1: Modern District Cooling Systems Best for Modern Needs

 

1. Non-CFC Refrigerant-Run Chiller

Chillers that are 10 years or older are probably using CFC refrigerants and this could be hindering profitability. This may mean a need to install a new chiller that runs on non-CFC refrigerant. For chillers that are not too old (age around 10 years), you can take advantage of innovative refrigeration systems by using retrofitting approaches such as replacement of compressor or orifice plates.

The type of retrofit depends on many things, but the major consideration is the type of chiller in question. The good thing is that major manufacturers offer chiller retrofit kits. Contact Araner for help if you want to determine the requirements of your chiller.

2. Modern Cooling Towers

Heat from the condenser to the outside air. Axial or centrifugal fans connected to the bottom of the tower may generate the flow of air in a forced draft tower. In the induced draft tower, the propeller fan placed at the top of the tower plays this role.

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Fig 2: Cooling Tower Type Matters

These processes may be seriously hindered by corrosion, scaling and growth of biological organisms. That is why an innovative refrigeration system should include modern chemical treatment solutions. Latest methods falling under the category of non-chemical water treatment technologies include ultraviolet irradiation, magnetic systems and ozone generators. In some instances, chemicals can be replaced completely by ozone, which is a very reliable oxidant.

3. Upgraded Pumping System

Pumping system in a district cooling system can be a huge energy consumer, but using an integrated system approach has been proven effective in addressing that problem. In your next district cooling project, you want to use the following three methods to save more energy in as far as the pumping system is concerned.

First, size the pumps correctly, allow for lower maximum loads, and achieve up to 70% energy savings. While the rated energy curves for loads can help in energy savings calculations, it is recommendable to contact the manufacturer or an expert if in need of assistance.

You can also upgrade the pumping system by installing variable speed drives that will ensure pump performance at maximum efficiency. Finally, you can opt to convert the system from a single loop setting to a secondary loop setting and earn even higher energy savings.

District Energy reference book

4. Modern Thermal Energy Storage (TES)

Innovative refrigeration systems for a district cooling project are also possible through an effective thermal energy storage system. Many developments are happening in the TES technologies leading to even better district cooling projects. You want to take advantage of tank technology innovations such as Graphite-Enhanced PCM, Compact TES and Resorption TES System.

There are many reasons for installing a modern TES system by ARANER for your district cooling makes sense. First, the overall cost of the installation is lower. This is because the installed capacity of the refrigeration plant is reduced. Alongside that is a reduction in the operational cost, as peak consumption can be avoided during high electrical tariff periods. An ARANER system can also offer an immense reduction in environmental impact through improved operating efficiency. For further details about this innovative solution, check out this infographic on district cooling.

5. Correctly Sized System

Various components of a district cooling system are usually sized wrongly. The most common mistake discovered in conventional systems is oversizing, a case which not only makes the installation costly but also adds to inefficiencies, promotes frequent breakdowns and increases operating costs. In your next district cooling project with ARANER as the spearhead, you can be sure key factors such as the following will be considered:

  • Chiller cooling capacity
  • Ideal fluid for chiller
  • Ambient air conditions

Conclusion

Implementation of a district cooling system, similar to any other large-scale refrigeration system, requires careful analysis and execution. Several contributors to an effective system have been highlighted in this post in order to give a hint how you can avoid various challenges in a district cooling project. It is our desire that the guidelines are helpful as you plan to undertake your next district cooling project.

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