Selection Procedure

Trane Series R chiller performance is rated in accordance with the ARI Standard 550/590-2003 Certification Program. Chiller selection assistance and performance information can be obtained by using the Series R chiller selection program, available through localTrane sales offices.

Performance

The computerized Series R chiller selection program provides performance data for each possible chiller selection at both full-load and part-load design points, as required.

It should be noted that changing the number of water passes or the water flow rates will generally alter the performance of a particular chiller.To attain maximum benefit from the wide range of chiller models and options available, designers are encouraged to first develop performance specifications and then use the chiller selection program to optimize all selections.This will help ensure selection of the compressor- evaporator-condenser combination that most closely meets the job requirements. To optimize system performance, all selections should also be balanced with other system components.

Fouling Factors

ARI Standard 550 includes a definition of clean tube fouling.The recommended standard fouling adjustments are 0.0001 hr-sq ft-deg F/Btu (0.0176 sq m-deg C/kW) for the evaporator and 0.00025 hr-sq ft deg F/Btu (0.044 sq m-deg C/kW) for the condenser, from an increment of 0.0000 “clean.” Chiller specifications should be developed using the most current standard fouling factors.

Part Load Performance

Actual air-conditioning system loads are frequently less than full-load design conditions. Depending on the number of chillers on the job and the load profile, chillers may operate at full load a small percentage of the time.With their excellent part-load performance characteristics and highly energy-efficient operation, Series R chillers can provide significant operating savings at these part-load conditions.

System Considerations

Part-load chiller operation is frequently associated with reduced condenser water temperatures. However, rather than focusing only on the chiller, it is important to balance these temperatures to achieve the most efficient system operation possible. At part-load operation, the heat rejected to the cooling tower is less than at full-load operation.

Part-load chiller operation is also typically associated with reduced outside wet bulb temperatures, resulting in improved cooling tower performance.The net result of reduced heat rejection and lower wet bulb temperatures can be cooler condenser water entering the chiller, ultimately improving unit performance. However, this does not improve pump or tower efficiency.To achieve the most efficient system operation possible, it is best to minimize the total power draw of the chiller, tower, and pumps, which may not mean limiting the condenser water temperature to what the tower can provide.To determine specific unit and system part-load performance for chiller selection purposes, use the Series R chiller computer selection program or contact the localTrane sales office.

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Trane RTHD manual Fouling Factors, Part Load Performance, System Considerations
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RTHD specifications

The Trane RTHD is a highly efficient and innovative HVAC solution designed for commercial and industrial applications. With a focus on reliability, performance, and energy efficiency, the RTHD series offers a wide range of features that set it apart from conventional heating and cooling systems.

One of the standout characteristics of the Trane RTHD is its robust construction. Built to withstand the rigors of daily use in demanding environments, the unit boasts a durable and weather-resistant cabinet. This design not only ensures longevity but also helps protect internal components from external elements.

Energy efficiency is at the forefront of the RTHD's design philosophy. The unit utilizes advanced technologies such as Variable Frequency Drive (VFD) for its compressor and fans. This allows for precise adjustment of the cooling and heating output, optimizing energy consumption based on real-time demand. As a result, the RTHD can achieve impressive Seasonal Energy Efficiency Ratios (SEER) and Heating Seasonal Performance Factors (HSPF), making it an environmentally friendly choice.

Another key feature of the RTHD is its compatibility with various control systems. The unit supports Trane's advanced control technology, enabling integration with building management systems for enhanced monitoring and operational efficiency. This capability allows facility managers to leverage data-driven insights to optimize performance and maintenance schedules.

The RTHD also incorporates innovative sound-reducing technologies, which ensure quiet operation, a significant consideration for settings where noise reduction is essential. Features such as acoustic insulation and strategically designed fan blades help minimize sound levels, making the RTHD suitable for a variety of commercial environments.

Ease of maintenance is another important aspect of the Trane RTHD. The design includes accessible components for quick servicing, minimizing downtime and overall maintenance costs. Additionally, Trane provides comprehensive support and resources to ensure that technicians can efficiently maintain and troubleshoot the system.

In summary, the Trane RTHD is a leading-edge HVAC solution that combines durability, energy efficiency, advanced control options, and quiet operation. With its range of features and technologies, it is well-equipped to meet the demands of modern commercial and industrial spaces, solidifying its reputation as a trusted choice in the HVAC market. Whether for new installations or upgrades, the RTHD delivers reliability and performance that customers can depend on for years to come.
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