Best practice examples
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2021Best practiceProject: Transition to climate-friendly refrigeration and air conditioning in Western Cape
Stemming from a successful bilateral relationship for over 20 years, the Governments of Bavaria and the Western Cape started a partnership project on the “transition to climate-friendly refrigeration and air conditioning” in 2017. The Deutsche Gesellschaft für Internationale Zusammenarbeit (GIZ) is the implementing partner of the project, facilitating the transfer of best practice and technology between Bavaria and Western Cape. From 2018 to 2020, nine selected South African experts participated in a two-week Cool Training Course in Maintal, Germany, where they learned how the adoption of climate-friendly cooling appliances is viable both from an economical and technical perspective. In 2019, the Department of Environmental Affairs & Developmental Planning (DEA&DP), Western Cape Government, together with the Bavarian Environment Agency (LfU), hosted a two-day technical workshop in Stellenbosch on the transitioning to green cooling solutions. The result of the successful workshop was the development of a RAC Pilot Project. The West Coast College was selected as the first Technical and Vocational Education and Training (TVET) college in the Western Cape, to train refrigeration and air-conditioning artisans on the use of natural refrigerant gases, in particular with hydrocarbons. With a financial contribution made by the Green Cooling Initiative of GIZ Proklima for the training equipment, as well as the provision of the RAC Training Modules for hydrocarbons, the pilot project is planned to be implemented by September 2021. …
2021Best practicePropane compact chillers for commercial cooling
Colruyt Group choose propane compact chillers as the standard solution for commercial cooling in its' food shops in Belgium and Luxembourg. Cold brine (MPG) is used to distribute cold to the refrigerated cabinets and the cold rooms. The condenser is being cooled with the same MPG, so the heat is released outside with drycoolers or the waste heat is used to heat the shop. This layout allows for a very low refrigerant content of under 4,3 kg. The ventilated enclosure design means that no ATEX zoning exists outside the chiller. The connections are made with fast release flexible couplings, thus allowing redundancy and quick exchange of a chiller when it is broken. This reduces pressure on the internal maintenance team, which add to the safety of the solution. …
2021Best practicePrototype and Test
When you have a new idea or want to improve system performance, first use simulation to evaluate if the idea will work. When design results are promising, take the concept to the lab for initial prototyping and testing. Such work can help inform proper component selection, controls settings, and system integration considerations. …
2021Best practiceProyecto Coca Cola Stratum Liberia, Costa Rica.
This project is one of the most modern, technological and automated plants of Coca Cola in the world. It is a project of approximately $ 100,000,000.00 and 43,132 square meters of construction that has the LEED Silver certification. What was our work on this project? It consisted of starting up the complete refrigeration system of the plant, which included all the air conditioning, the cooling of the process water and the cooling of the refrigerated storage chambers and the freezing chamber. One of the most important conditions was to do an energy efficient and environmentally friendly project, and although the project was originally designed with ammonia, the required power and the volume of refrigerant in the system raised doubts about the application of this natural refrigerant. In term of refrigeration level, the plant required 750 TR in plant air conditioning and 150.0 TR in cold water systems for process and 208.0 TR in refrigerated and frozen storage systems. Originally the project was designed by other professionals, and the question at that time was not exactly the refrigerant, the question was oriented towards the ammonia volume of the system. The original design considered approximately 8 thousand pounds of ammonia. Our job then consisted of redesigning the project, it was then that we changed from a recirculated ammonia system to a direct expansion system for low temperature charging, where we used evaporators with a maximum ammonia volume of 2 pounds per equipment and, we maintained the water and propylene glycol cooling system with a flooded ammonia system; which in one way or another is also a low volume system. Our contribution was in addition to that, to increase the efficiency of the system, we increased the evaporation temperatures, we decreased the installed power and this represented an approximate energy saving of $250,000.00 per year and it was also possible to minimize the amount of equipment in the machine room. From an original design of 8 compressors we redesigned to 6 screw compressors of the same model and that came to give safety and an additional benefit for the maintenance . Entering the engine room we find 6 screw compressors, in this case they are Frick, they are 6 identical compressors in terms of model and power. We are going to find three plate heat exchangers, one for process water cooling, one for air conditioning water and another for propylene glycol cooling with which we air-condition the refrigerated storage chambers, named Water house and cool Flamable. We also found an ammonia dehydrator, which was incorporated to remove any moisture or water and thus maintain the efficiency of the system. In addition, we find that automation system, which one we not only control, we also monitor the entire refrigeration system of the machine room. Security and leak detection systems that comply with IIAR standards were incorporated into the system. It is basically an engine room where the entire volume of ammonia is concentrated, we are talking about 2800 pounds, 5000 pounds less than the original design. It is important to mention that the new design considered the use of heat of the oil compressor for heating the storage frozen floor and thus taking advantage of residual energy, a radiant floor was built. The main achievements of the project in terms of the redesign of the refrigeration system were the following: • The installed power of the cooling system was reduced by 472.5 Hp (352.49 KW). • The efficiency of the system was increased by 13.26%. • The ammonia volume was decreased by 4,822.00 pounds (2,187.24 Kg). • Ammonia, a natural refrigerant with a GWP of zero, was maintained. • The heat of the compressor oil was used in the requirements of the same system. • Equipment was standardized so that six compressors were installed identical in model and power. • A system was redesigned under the IIAR standards, the INTECO standards in Costa Rica, the Montreal Agreement and the Carbon Neutrality Country Program. • Savings were achieved in the initial investment. …
2021Best practiceR&D on refrigeration and heat pump systems applying natural working fluids
Education of next generation of engineers within refrigeration processes including thermal energy storage technologies. …
2021Best practiceRecovery
-Recovering of traditional and transitional refrigerants -use of proper equipment for recovery -proper storage of recovered refrigerants - …
2021Best practiceRevision of the energy efficiency program for room Acs
iCS and a network of NGOs provided technical support to INMETRO for the revision of the Brazilian Labeling program for room ACs. This network also actively worked to pressure INMETRO to adopt a more ambitious energy efficiency levels. The process resulted in the Ordinance 269/2021. …
2020Best practiceSABROE SABlight air-cooled chiller
Johnson Control’s SABROE SABlight air-cooled chiller uses propane as a refrigerant, providing an environmentally friendly and economic alternative to air-cooled chillers using synthetic refrigerants. Six standard models for use in the low capacity market exist. When comparing efficiencies, the SABlight exceeds hydrofluorocarbon chillers. The frequency-controlled standard compressor ensures a very high coefficient of performance (COP). Moreover, the wide control range makes it a highly flexible chiller that will operate efficiently even at low loads. The SABROE SABlight air-cooled chiller is tailored for outdoor installation with a very low-noise operation. The particularly compact design uses V-coil condensers to significantly reduce the total carbon footprint. With a height of only 2.9 m and a width of only 1.3 m, SABlight units are extremely manageable. …
2021Best practiceSafety
Use of appropriate equipment and PPEs when handling natural (HCs) refrigerants. …
2021Best practiceSaving 26.5% energy on HVAC Chiller system at the French Embassy in Thailand
The Embassy of France in Bangkok participated in the 2018 France Ministry of Europe and Foreign Affairs’ Green Embassy contest with its project to reduce energy consumption related to air conditioning. Installing CONTINEWM® Nets have contributed to save 26.5% of electricity consumption of the airconditioning (Chiller system) of the entire building and succeeded to place the project in the TOP 5 in the Green Embassy worldwide contest. The project consists in equipping the Air Conditioning system with the innovative CONTINEWM® Japanese technology from the French-Thai company Technic Electrical Engineering (Thailand) Co., Ltd. The reduction of the electricity consumption is equivalent to a validated reduction of 80 tons per year of CO2 emissions. The performance measurement was made by comparing the electricity consumption of chillers of the administrative building of the French Embassy WITHOUT and WITH CONTINEWM® Net under strictly same conditions and environment over a 3-month period under the control and validation of the Deputy Director of Buildings and Logistics, Deputy Director of Central Services and Logistics of the Ministry of Europe, Foreign Affairs and Development. These FIR emitting ceramic Nets optimize air conditioners and reduce energy consumption while improving the quality of the air by ionization. …