We would like to sincerely thank everyone who visited our stand during the exhibition and showed interest in this solution. Your time, questions and interest were essential to the success of the event.

The GASCOOLER HYBRID LEVANTE incorporates an automatic Hybrid system that guarantees a maximum CO₂ outlet temperature of 32 °C, regardless of the outdoor temperature. This results in greater energy efficiency, operational stability and maximum reliability for CO₂ refrigeration installations.

In addition, its design incorporates distinctive solutions that provide real added value:

• Parallel coil configuration, ensuring a more uniform air distribution.
• By-pass dampers, extending the lifespan of the adiabatic panel and reducing fan energy consumption.
• Full-access technical walkway, facilitating cleaning and maintenance tasks.
• Water recovery system, capable of reducing consumption by up to ten times compared to conventional adiabatic systems.
• Optimized hydraulic system, designed to prevent the proliferation of legionella through constant recirculation, temperature control, continuous replenishment with clean and fresh water, and periodic draining and drying of the circuit.

A solution that combines efficiency, sustainability and ease of maintenance, designed for the retail of the future.

It was a real pleasure to present this innovation and share ideas, projects and new opportunities with you.

Your interest and feedback drive us to continue developing increasingly efficient and sustainable technologies.

Thank you for your time and trust.

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This is due to several factors:

• Fragility of the evaporator coil:
  The tubes that make up the coil have a very thin wall thickness to maximize thermal transfer of the refrigerant. This characteristic makes them more vulnerable to physical and mechanical damage.
• Continuous cycles of temperature and pressure:
  Constant expansion and contraction cause misalignments between the tubes and the metal support plates. These movements generate contact points and friction that, over time, lead to material wear and leaks.
• Corrosion from airflow and chamber environment:
  The air circulating through the evaporator may contain corrosive substances from the respiration and decomposition of perishable products, which accelerates the deterioration of heat-exchange coils.
• Chemical attack from drain vapors:
  Vapors produced by stagnant water decomposition in the drainage system rise toward the evaporator and damage both welds and tubes through corrosive processes.

What can we do?
To respond to this scenario, at Garcia Cámara we have developed a new generation of multipurpose evaporators, designed with thermal and mechanical compatibility criteria that allow their use in different refrigeration cycle configurations.

What does it mean for an evaporator to be multipurpose?
It means it is designed and ready to operate with the current system, but also prepared for future refrigerants and emerging technologies. To achieve this, we analyze each case to offer:
• Heat exchangers optimized to operate with current HFC refrigerants and alternative fluids such as CO₂ (in subcritical and transcritical applications), pumped or direct-expansion NH₃, as well as solutions with secondary fluids.
• Coil designs and fin-tube geometries adapted to variations in pressure, cooling capacity, and thermal regime according to the refrigerant.
• Components and materials selected to ensure chemical compatibility and resistance to high operating pressures (especially in CO₂).
• Flexible configuration for different evaporation regimes and mass flow rates, facilitating integration into hybrid systems or transition phases.

What are the advantages of having this product?
• Service continuity without prolonged shutdowns or complete system replacement.
• Phased planning of the transition.
• Reduced economic impact, avoiding immediate large-scale investment.
• Maximizing the value of investment through the replacement of standard evaporators with multipurpose ones.
• Increased lifespan of existing installations, aligning them with future regulatory scenarios.

Commitment and Objective:
Our commitment and objective is to offer solutions that maintain thermodynamic efficiency, ensure mechanical compatibility, and anticipate future regulatory requirements.
Because the transition in refrigeration is inevitable, but it doesn’t have to be traumatic or economically unfeasible.
Multipurpose evaporators are a key component for facing the transition toward natural refrigerants and low-GWP systems without compromising the operability of current installations.

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Design and Execution of Installations with NH₃ in Direct Expansion
The correct operation of direct expansion systems with ammonia (NH₃) largely depends on rigorous technical design and careful on-site execution. Below, we outline the key aspects to ensure system safety, efficiency, and reliability:

1. Welding with Inert Atmosphere
   During the welding process of refrigeration lines, it is essential to use an inert atmosphere (N₂ or Ar) inside the tubes. This prevents scale formation from oxidation, which can cause blockages and failures in valves and system components.
2. Sizing for Maximum Mass Flow
   Liquid and suction lines must be sized considering the highest possible mass flow, which occurs under conditions of minimum discharge pressure and maximum suction pressure. This scenario represents the point of greatest hydraulic demand for the piping.
3. Calculation of Diameters and Number of Lines
   It is essential to calculate the number of lines and their respective diameters, ensuring that:

• Fluid velocities remain within the optimal range for oil entrainment and thermal stability.
• Pressure drops are controlled and remain within the limits defined in the design, under any operating condition.

4. Routing of Vertical Pipes and Traps
   Vertical ascending pipes must:

• Have a trap at the beginning (at the base) to ensure correct liquid entrainment and consequently promote oil recovery in the system (this oil must be miscible with the refrigerant).
• Discharge at the top of the return header, preventing oil from flowing back down into the ascending pipes.

5. Drainage of Traps
   Drain points must be provided at the lowest parts of the traps, allowing emptying and, if necessary, purging oil from the system.
6. Slope in Suction Lines
   Suction lines must be installed with a minimum slope of 0.5% in the flow direction toward the suction separator, promoting oil return and refrigerant drainage.

The entire system must be designed and installed in compliance with current technical standards, considering safety, maintainability, and energy efficiency as fundamental pillars.

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We are committed to sustainability and energy efficiency through the design, development, and implementation of refrigeration systems using ammonia (NH₃) in direct expansion and low charge. This technology represents a natural evolution towards safer, more efficient, and environmentally friendly systems, aligning with decarbonization policies and the reduction of high-GWP refrigerants.

Benefits of Using NH₃ in Low-Charge Direct Expansion Systems
The use of ammonia (NH₃) as a refrigerant in low-charge direct expansion (DX) systems offers technical, economic, and environmental advantages, positioning it as a highly efficient and sustainable solution for industrial applications:

• Greater Environmental Sustainability
  NH₃ is a natural refrigerant, with global warming potential (GWP) equal to zero and no impact on the ozone layer (ODP = 0).
• Significant Reduction of Refrigerant Charge
  These systems use up to 30 times less NH₃ than a flooded system, reducing risk in case of leakage and simplifying regulatory compliance.
• Lower Operating Costs
  Lower refrigerant consumption and superior energy efficiency lead to significant savings in operation and maintenance.
• Annual Energy Savings
  Compared to HFC direct expansion systems, DX systems with NH₃ achieve higher energy efficiency, reducing annual electricity consumption.
• Optimized Heat Exchanger Design
  Less heat exchange surface is required in evaporators, thanks to ammonia’s excellent thermodynamic properties.
• Reduced Size of Refrigeration Piping
  Pipe diameters are smaller, simplifying installation and reducing material and insulation costs.
• No Need for a Dedicated Machine Room
  Thanks to the low charge, there is no obligation to provide a specific technical room, allowing the installation of packaged plants or chillers, offering flexibility and space savings.
• Simplified Regulatory Compliance
  The reduced refrigerant charge facilitates compliance with safety and environmental regulations, easing technical and legal restrictions.

Summary of Benefits:

1. Environmental Sustainability: NH₃ with GWP = 0 and ODP = 0.
2. Reduced Refrigerant Charge: Up to 30 times less NH₃ compared to flooded systems.
3. Lower Operating Cost: Savings in maintenance and refilling.
4. Lower Annual Energy Consumption: Higher efficiency than HFC DX systems.
5. Reduced Evaporator Surface: More compact heat exchangers.
6. Reduced Piping Diameters: Lower costs for installation and materials.
7. No Specific Machine Room Required: Greater design flexibility and less space.
8. Simplified Regulatory Compliance: Fewer restrictions, safer and more accessible designs.

These benefits make low-charge NH₃ direct expansion systems an efficient, safe, and sustainable solution for modern industrial facilities.

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This technological breakthrough meets the growing demand for more efficient, safer and more sustainable solutions in industrial refrigeration, delivering significant improvements in performance and operability.

Our commitment to innovation and sustainability drives us to develop solutions that align with new market requirements and environmental regulations. The gradual restriction on fluorinated refrigerants has accelerated the adoption of natural alternatives such as ammonia (NH₃), prompting continuous evolution in industrial refrigeration system design.

Against this backdrop, we are developing, within our industrial range, DX evaporators for NH₃ refrigeration in low-charge systems. These systems use roughly 30 times less refrigerant than a flooded system, minimising risk in the event of a leak by reducing the total quantity of ammonia on site.

From an operational standpoint, this reduced charge demands meticulous design to ensure thermal efficiency and system reliability. Defrost management is critical in these evaporators, which is why we offer several technical solutions—the most recommended being the nested coil, allowing residual system heat to be harnessed for defrosting with hot gas or glycol.

This strategy not only contributes to efficient system operation but also forms part of a comprehensive approach to energy optimisation and reduced environmental impact.

In short, designing low-charge NH₃ industrial refrigeration systems requires balancing performance, safety and sustainability. At GARCÍA CÁMARA we are ready to provide technical solutions that meet these challenges with proven effectiveness.

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Several methods can be used to remove this frost, such as:

• Air defrost: This is a simple technique that involves temporarily stopping the flow of refrigerant through the evaporator coils while keeping the fans running. By doing so, the warm air generated by the fans helps melt the frost through frictional heat and heat transfer from the air to the frozen surface. This method is especially useful when the ambient temperature is above 5°C, as under these conditions the warm air can defrost the frost without the need for more complex or costly systems.
• Electric resistance defrost: This is a straightforward and direct method for removing frost from coils. It involves suspending the flow of refrigerant through the tubes and activating electric heaters placed between the tubes and fins. Thanks to the Joule effect, these resistances generate heat that melts the accumulated frost. However, it’s important to note that this system requires additional electrical consumption, as the heaters need power to generate heat. It is an effective solution, particularly in situations that require fast and controlled defrosting, though it does imply extra energy costs.
• Hot gas defrost: This method works by introducing hot or warm gas—taken from the discharge gases of the refrigeration system—directly into the interior of the evaporator tubes. Since the hot gas has a higher temperature than the frost covering the tubes and fins, it helps melt the frost quickly. However, this method requires that hot gas be available for the process, and it also involves considering the distance between the compressor unit (where the hot gas is generated) and the evaporators. As the gas travels through the system, it loses temperature, which may reduce its effectiveness in defrosting. It is an efficient method, but proper planning is necessary to ensure the gas reaches the coils at a sufficient temperature

DEFROST BY INTERLEAVED COIL – Versatile Technology

At García Cámara S.L., we integrate technology and innovation to care for the planet. That’s why we are committed to defrosting systems that harness heat recovery as an energy source—an efficient and environmentally friendly solution.

Our interleaved coil system stands out for its high effectiveness, simplicity, and low operating cost. It keeps evaporators free of frost without consuming additional electricity, resulting in a lower energy impact.

Thanks to its rapid action, evaporators regain their optimal performance in a very short time, which is especially useful in demanding applications such as low-temperature cold rooms, freezing tunnels, or blast chillers.

Moreover, its versatile design allows integration with any type of refrigerant, as it operates without circulating through the same coil.

In short, we are committed to smart solutions that combine efficiency, sustainability, and technology—serving both our clients and the planet.

• Defrost by interleaved coil: This system consists of a secondary circuit through which a heat transfer fluid is circulated. In this setup, the evaporators are equipped with two interleaved (overlapping) coils—one carrying the refrigerant (cold coil) and the other carrying the higher-temperature heat transfer fluid (hot coil).

Thanks to the heat recovery from the compressor’s discharge gases and the use of a heat exchanger, the heat transfer fluid is heated and can be stored in a tank. This allows heat to be readily available at the start of defrost cycles without the need to generate hot gas instantly, optimizing the process and reducing energy consumption. It is a highly intelligent system that makes use of residual heat from the refrigeration system to improve overall efficiency.

García Cámara is efficiency and sustainability.

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We make a difference:

• Quality Control:In our OEM lines, we set high quality standards for the components we manufacture, ensuring that the final products meet market expectations.
• Technology and Know-How:We invest in research and development, enabling us to apply advanced technologies and state-of-the-art manufacturing processes. This enhances product quality and reliability.
• Collaboration with Other Manufacturers:We work in close partnership with the brands that commercialize the final products. This synergy allows for the optimization of product design and functionality.
• Economies of Scale:By producing in large volumes, we maintain high quality standards while reducing costs, benefiting both manufacturers and end consumers.

As with our industrial line, the OEM range significantly contributes to improved air quality and environmental sustainability through the use of natural refrigerant R290.

R290 refrigerant gas, also known as propane, offers several environmental benefits when adopted by OEMs (Original Equipment Manufacturers):

1. Low Global Warming Potential (GWP):R290 has a GWP of just 3, compared to other refrigerants like R32, which has a GWP of 675. This means R290 contributes far less to global warming.
2. Energy Efficiency:R290 is highly efficient in terms of energy consumption, reducing the amount of energy needed to operate refrigeration and air conditioning systems.
3. Reduction of Greenhouse Gas Emissions:As a natural gas that does not contain chemical agents responsible for greenhouse gas emissions, R290 has a significantly lower environmental impact.
4. Regulatory Compliance:In Europe, regulations such as the F-GAS Regulation (EC 517/2014) promote the use of low-GWP refrigerants, and R290 complies with these requirements, facilitating its adoption by OEMs.
5. Adaptability:R290-based refrigeration technologies can be adapted for both commercial and industrial systems and equipment, allowing for broad application across different sectors.

In summary, the adoption of R290 refrigerant by OEMs not only enhances the efficiency and performance of refrigeration systems but also represents a significant step forward in environmental protection.

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This innovation offers several benefits to users:

1. 3D models. With the inclusion of the BIM format, users have access to three-dimensional models of the equipment. These 3D models allow an accurate and realistic visualisation of the products, facilitating a better understanding of their characteristics and dimensions.
2. Piping integration. One of the most prominent features of BIM models is the inclusion of piping for piping use. This allows users to plan and design piping systems more efficiently, ensuring that all components fit seamlessly into the overall project design.
3. Links to data sheets. Each model includes a direct link to the 3D model and product data sheet. This gives users instant access to detailed information on specifications, materials and other key data, improving decision making and design accuracy.

At Garcia Camara we are committed to innovation and efficiency in our processes.

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During the tour, led by our engineering team, the students gained firsthand insight into our various manufacturing processes and the technologies we use to develop refrigeration solutions. The visit was particularly engaging, as the students asked insightful questions and showed great enthusiasm for the industry.

Our engineers shared their expertise and knowledge with these future installers, providing them with a real-world perspective on the professional field they will soon enter.

IES Llombai de Burriana is an inclusive educational center committed to integration and fostering empathy among students through solidarity initiatives and valuable training projects. At GC, we appreciate and support these collaborations, which bridge the gap between the business world and education, contributing to the training of future professionals.

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At GC, we have developed our range of evaporators and condensers to work with CO2 with PS45, PS60 and PS80, in line with our commitment to environmental responsibility.

The benefits of CO2 as a refrigerant include:

• Efficient: It offers high heat transfer coefficients and high thermal conductivity.
• Clean: CO2 is a natural, clean and environmentally friendly refrigerant.
• Safe: CO₂ is non-corrosive, non-flammable and non-toxic.
• Economical: the cost of production is low, making it a safe and inexpensive alternative for refrigeration.
• The low viscosity of the liquid and gas lines allows for the use of smaller piping, thereby reducing system costs.
• Excellent cooling properties: high volumetric cooling capacity (6 times higher than R404A), resulting in smaller compressors, components and piping. In addition, its constant evaporating temperature character makes it possible to use it with a smaller temperature difference in evaporators and heat exchangers. The result is much lower energy consumption
• High cascade efficiency: performs well in cascade systems, offering excellent efficiency and performance values with low temperature systems.

At GC we are committed to innovation and sustainability.

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