- EN
In the field of refrigeration and air conditioning technology, Bitzer is a German manufacturer with a long history of development. This article focuses on the Bitzer CSW105 compact screw compressor, analyzing its technical characteristics and operational advantages in two application areas: data center cooling and high-temperature heat pumps.
The CSW105 demonstrates strong suitability in data center cooling and high-temperature heat pump applications. Both scenarios impose high demands on compressor load regulation capability, operating efficiency, and adaptability to varying operating conditions.
As data center rack power densities continue to rise, overall thermal loads have increased significantly. Cooling systems must provide substantial cooling capacity with low energy consumption to support continuous operation and maintain low PUE (Power Usage Effectiveness) metrics.
Key technical features of the CSW105 in data center applications include:
Cooling Capacity: In a tandem configuration with two units connected in series, the CSW105 can achieve a cooling capacity of up to 4 MW, making it suitable for the cooling requirements of medium to large data centers.
Regulation and Efficiency: The unit is equipped with dual slide valve technology and automatic volume ratio (Vi) adjustment. The dual slide valves enable load regulation across a wide range, while the automatic Vi adjustment allows the compressor to maintain high efficiency under varying operating conditions, thereby reducing electricity consumption.
Heat Recovery Support: The CSW105 is designed with a relatively high condensing temperature, which enables integration with data center waste heat recovery systems. This allows waste heat from server rooms to be converted into building heating or domestic hot water, improving overall energy utilization.
In the industrial sector, high-temperature heat pumps can be used to recover process waste heat and reduce fossil fuel consumption. The technology platform of the Bitzer CSW105 series has been extended to the CSH2T ultra-high-temperature screw compressor, which can achieve a discharge temperature of up to 120°C. This makes it suitable for applications requiring high outlet temperatures, such as industrial drying and district heating networks. The series draws on Bitzer's more than four decades of technical expertise in screw compressor development.
The CSW105 offers the following features in terms of system configuration and operational management:
Refrigerant Compatibility: Supports low-GWP (Global Warming Potential) environmentally friendly refrigerants such as R1234ze(E), meeting current international environmental regulations.
Intelligent Monitoring and Control: Equipped with the IQ module as standard, which integrates monitoring, control, and communication functions. It supports remote commissioning and fault diagnosis, reducing on-site maintenance workload.
Manufacturing Background: Bitzer is one of the few manufacturers worldwide that simultaneously produces piston, screw, and scroll compressors. The company employs more than 4,500 people globally and achieved a turnover of €1.12 billion in 2024.
The CSW105 compact screw compressor is suitable for projects with high requirements for cooling capacity, energy efficiency, adaptability to operating conditions, and intelligent management. It has already demonstrated practical application viability in data center cooling and high-temperature heat pump systems. For users concerned with long-term operating costs and system reliability, this model represents a technical solution worthy of evaluation.
