ZERO R1234ze Water-Cooled Chiller

ZERO is developed for industrial processes and central air-conditioning requiring continuous, high-capacity and stable cooling. Applications include plastics and rubber, food and beverage, pharmaceuticals, chemicals, automotive, energy, data centres and large commercial buildings. Capacity and operating configuration are determined specifically for process temperature, flow, load variation, daily operating hours and redundancy requirements.

ZERO offers 10–4,000 kW of cooling capacity. Required capacity is calculated not only from nominal load but also inlet and outlet water temperatures, flow, condenser-water conditions, partial-load profile and simultaneously operating equipment. This prevents over- or undersizing and supports stable, efficient operation.

R1234ze is a next-generation HFO aligned with the transition to low-GWP refrigerants under the EU F-Gas Regulation 2024/573. Its 100-year GWP is 1.37, greatly reducing direct greenhouse-gas impact versus conventional HFCs. Its thermodynamic properties are combined with ZERO-specific compressor technology, high-efficiency heat exchangers and advanced capacity control to increase COP and reduce full- and partial-load energy use. R1234ze is not a simple refrigerant substitution: compressors, heat exchangers, piping, oil management, controls and safety equipment must suit its thermodynamics and A2L classification. ZERO is designed specifically for this technology as a high-efficiency, long-term solution supporting European low-emission targets.

Correct selection must not use nominal capacity alone. Process inlet and outlet temperatures, water flow, product or machine heat load, simultaneity, condenser-water temperature, daily hours and seasonal load variation are assessed together. Oversizing can cause frequent cycling and poor part-load efficiency; undersizing can prevent the required water temperature from being reached. Compressor count, circuit layout, capacity control and redundancy are therefore set for the real operating profile.

Yes. ZERO can be engineered to work with the existing cooling tower, pump group, piping and building automation. Before integration, flow, pressure loss, water volume, condenser-water temperature and existing equipment capacity are checked. Hydraulic balancing, pump upgrades, a buffer tank or automation update can be applied if required.

R1234ze is a next-generation HFO with exceptionally low global-warming potential under EU F-Gas Regulation 2024/573. Its 100-year GWP is 1.37, far below conventional HFCs, aligning ZERO with the EU transition away from high-GWP refrigerants. Compliance also covers charge, containment, labelling, leak checks, recovery and authorised service work. Because R1234ze is an A2L mildly flammable refrigerant, the circuit, ventilation, gas detection, electrical equipment and safety scenarios are designed around its technical properties, combining low environmental impact, high efficiency and long-term European refrigerant objectives.

The ZERO Series’ high COP and strong part-load performance can deliver significant compressor-energy savings compared with conventional chiller systems. Actual savings depend on the efficiency of the existing unit, annual operating hours, load profile, condenser-water temperature and electricity unit price. Depending on real operating conditions, annual energy savings are generally evaluated in the 15–25% range. The definitive saving is determined through an annual energy simulation using the plant’s load profile and operating data.