Scroll Compressor Hitachi Air Chiller to Match Capacity

The spiral Hitachi Air chiller system is a central air conditioning product commonly applied to hotels, hospitals, cinemas, sports centers, entertainment centers, commercial buildings, office buildings, industrial and mining enterprises, etc. This product line can be installed on the roof or outdoor yard, without the need for a special machine room and cooling tower, helping investors optimize the area without needing to build a specialized machine room or install a cooling tower. cumbersome. To choose the most suitable and optimal capacity for the project, U.P Tech is proud to be a reputable distributor, providing genuine Hitachi Air Chiller solutions.

Overview of Spiral Hitachi Air Chiller Systems

Hitachi scroll compressor systems utilize two interlocking scroll plates to compress the refrigerant. These compressors have fewer moving parts, resulting in smoother operation, reduced vibration, and significantly lower noise levels.

The core benefit of DC Variable-Frequency (DNF) technology is the integration of DC Inverter technology, providing stepless power control from 25% to 100%, closely matching the building's actual load. Simultaneously, this technology allows the system to operate with low starting current, minimizing impact on the regional power grid and achieving superior energy savings (up to 30% compared to conventional variable-frequency compressors).

Structure of Scroll Hitachi Air Chiller System

Both Scroll Chiller lines inherit the sealed scroll compressor technology using R410A refrigerant. The compressor unit includes new asymmetrical scroll mechanism features that minimize leakage and overheating during suction. The pressure relief valve helps the compressor adapt better to continuously changing pressure ratio conditions, optimizing performance when running at partial load. The non-contact gasket design with the lubricating oil film acts as a seal at the scroll ends, reducing internal friction, increasing durability and reliability. The high-efficiency concentrated motor uses new generation magnetic materials (Nd-Fe-B magnets) and a concentrated winding design. This design reduces the motor height, limits energy loss, and adapts excellently when running with variable frequency drives at low load ranges. The internal oil circulation system helps reduce heat loss due to overheating and controls the oil discharge rate, maintaining a good lubricating oil film for the compressor.

The overall structure and casing design feature an air-heat exchanger geometry to optimize installation space:

• The V-Series is a V-shaped heat exchanger with a condenser arranged in an optimized V-shape using CFD aerodynamic wind field simulation. The V-angle ensures even airflow, increases contact area, increases heat exchange efficiency by 30%, and reduces compressor power consumption. The V-shaped base incorporates an embedded triangular structure to enhance the rigidity of the device, resist impact, and better protect the heat exchanger surface during transportation and installation.
• The Smart Series is a U-shaped heat exchanger with a modified condenser structure in a rounded shape. With improved space utilization (Smaller Footprint) and a more compact casing design, the AVSY series has a floor footprint reduced by up to 28% compared to the previous AVMY series. This is extremely suitable for buildings or factories with limited rooftop/yard space for unit placement. The integrated condensate tray below the heat exchanger is equipped with a standard bottom drain tray to easily collect and drain rainwater or defrost water.

The auxiliary components in the spiral Hitachi chiller system are all made of high-quality components to synchronize inverter control performance:

• The water-side heat exchanger is a sealed plate type made of high-grade material, providing superior heat transfer efficiency under both full load and half load conditions.
• The air-side heat exchanger uses internally threaded copper tubes with trapezoidal internal threads. This design increases the contact surface area and creates turbulent vortex flow for the refrigerant, improving heat dissipation efficiency by over 30% compared to conventional smooth copper pipes.
• The high-precision electronic expansion valve acts as an actuator regulating the refrigerant flow, capable of adjusting the opening up to 500 steps of resolution. The valve reacts quickly and sensitively to temperature changes and load reversals, precisely controlling suction line superheating.
• The intelligent control cabinet with integrated VFD is equipped with a high-speed microprocessor and a user-friendly 4.3-inch color touchscreen. The system incorporates built-in logic algorithms for smooth stepless power control from 25% to 100% (or from 9% depending on the model).
• The modular mechanism allows connection of up to 16 independent modules to form a large system (up to over 2000 kW). Each module has its own control cabinet, allowing for flexible on/off switching or automatic Master-Slave role switching. When a module malfunctions or requires maintenance, the entire system can continue to operate normally without interruption.

Hitachi Air Chiller Scroll Classification

Hitachi Air Conditioner scroll chiller product lines all use the environmentally friendly R410A refrigerant: The two standard lines of Hitachi scroll chiller systems are the standard V-Series and the Smart Series AVSY:

• The V-Series (Model code AVMY) has a single module power range, including 3 main models: RC(H)UA065AVMY (Cooling capacity: 65 kW), RC(H)UA130AVMY (Cooling capacity: 130 kW), and RC(H)UA150AVMY (Cooling capacity: 150 kW). The optimized V-shaped heat exchange surface and robust casing are well-suited to harsh weather conditions.
• The Smart Series (AVSY series code) is a range of single-module power units including models RCUA065AVSY/RHUA065AVSY (64.5 kW) and RCUA130AVSY/RHUA130AVSY (129 kW). This series offers superior space savings with an installation footprint up to 28% smaller than the AVMY series, and boasts an IPLV (Inlet Load Value) of 6.06 and an impressive COP (Coefficient of Performance) of 3.0.

Classified by operating function: Pure Cooling Only Units (RCU code) are suitable for tropical climates requiring year-round cooling, with an operating inlet air temperature range up to 43°C. Heat Pump Units (RHU code) offer both cooling and heating capabilities. The device is capable of heating at ambient temperatures as low as -15°C or, optionally, at an ultra-low temperature range of -25°C.

Hitachi Air chiller systems spiral offer superior performance

The product focuses on high efficiency with independent refrigerant operation; each compressor circuit operates in conjunction with the load to ensure stable water temperature output. High-efficiency plate heat exchangers are used to enhance overall efficiency and partial load, optimizing system performance. It utilizes an environmentally friendly and internationally recognized refrigerant (R410A) with advantages such as stable performance, non-toxicity, ozone depletion potential, and zero ODP (Ozone Depletion Potential). It also meets environmental protection requirements and HFC410A is a long-term replacement for R22 refrigerant, saving energy and reducing emissions, protecting the environment, and contributing to the national sustainable development strategy.

The compressor system features high-efficiency inverter technology, fewer parts, and maximum reduction of vibration and noise. The machine operates with direct air intake and higher flow efficiency, using Nd-Fe-B magnets to improve motor efficiency. In particular, the ability to combine multiple modules freely (65kW, 130kW, or 150kW modules can be combined into a system) offers greater application flexibility. Modules of different models can be freely combined to support 1-16 modules connected in parallel, with maximum cooling and heating capacity up to 2064 kW (for the Smart RC(H)UA-AVSY series) and 2400 kW (for the V-Series AVMY series), meeting the load requirements of various buildings.

The modules are capable of automatically switching roles between the main and sub-modules. When a module in the system malfunctions or needs to be temporarily shut down for maintenance, the circuit board will automatically disconnect that module, while the remaining modules continue to operate normally. This process does not affect the overall system operation, effectively addressing the potential risk of the main module failing. Independent operation facilitates easy installation and ensures uninterrupted chilled water supply to the building. This reduces the unit's starting current, minimizes the impact on the power grid, and ensures the safety of other electrical equipment in the same area. The main and sub-modules can be freely switched, and when the main module fails, it does not affect the entire system's operation, effectively resolving the potential risk of a main module failure paralyzing the entire system. The system is designed and operates independently for easy installation and maintenance.

Practical Applications of Spiral Hitachi Air Chiller Systems

The compact, monolithic modular design and optimal weight distribution make transporting Hitachi Air chiller by forklift or elevator extremely convenient, completely eliminating the need for heavy-duty lifting equipment. The product has wide applications:

For commercial and service buildings: Suitable for installation in hotels, hospitals, cinemas, sports centers, and office buildings. Thanks to inverter technology and a sealed compressor structure, the system minimizes vibration and noise. Additionally, investors can choose an ultra-quiet operation mode to meet the stringent nighttime noise standards of resorts and offices.

For factories and industrial enterprises: Export processing zones, light to heavy industrial manufacturing plants, and mining plants. The intelligent computerized control system, combined with an electronic expansion valve, maintains a stable and highly accurate chilled water output temperature, serving to cool molds, machinery lines, and keep the cleanroom environment always up to standard.

Experience in choosing appropriate capacity

The investor needs to carefully calculate the amount of heat based on the area, volume, glass wall structure, the amount of heat generated from the machinery system, lighting equipment for the factory as well as the density of operators inside the building to choose the most appropriate number of modules.

Choose a machine model that optimizes installation space. For renovation projects or high-rise buildings with limited rooftop area and machine placement on the roof, the Smart Series (AVSY) is the leading solution thanks to its U-shaped design that helps reduce the surface area occupied by 28% compared to the standard series, freeing up space for other items.

Thanks to its free modular connection feature, the Hitachi spiral chiller allows investors to plan phased installation according to each stage of completion of the project. You can pre-install a few modules in the early stages to reduce the pressure on initial investment capital, then easily buy additional modules and pair them when the project expands in scale.

The Hitachi Scroll Compressor Chiller System provides the optimal cooling solution thanks to the combination of high performance, durable construction from nearly 40 years of compressor manufacturing expertise and flexible coupling capabilities. Choosing the V-Series (AVMY) or Smart Series (AVSY) product lines will help businesses optimize operating costs, save installation space and ensure long-term system safety. To survey the actual site, calculate detailed cooling load and receive the best quote for the genuine Hitachi Chiller system, customers please immediately contact U.P Tech, a genuine distributor of Hitachi air conditioners, to receive professional technical support, suitable for the project and most cost-optimized.

U.P. TECHNOLOGY AND TRADING CO., LTD.

Hotline: 1800 6202

Email: vu@uptech.com.vn

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