As part of a renovation project, cold.world Engineering was commissioned with the preliminary planning and conceptual realignment of the existing air conditioning system in a shopping center. The aim was to switch to environmentally friendly, energy-efficient technology and to comply with the EU’s stricter F-Gas Regulation.

Initial situation: High GWP values and high environmental impact

The first inventory revealed that the existing chillers were technically outdated: they were working with fluorinated refrigerants with high GWP values (e.g. R422D with GWP 2620 and R410A with GWP 1975). These refrigerants are subject to strict usage restrictions and future bans – associated with rising operating costs and regulatory risks.

Responsible planning: focus on sustainability and energy efficiency

As part of the planning process, several alternatives based on natural or particularly climate-friendly refrigerants were evaluated – including ammonia (R717), propane (R290) and R1234ze. These have GWP values < 7 and enable a safe long-term system strategy.

cold.world Engineering developed a coherent overall concept that not only included the replacement of the machines, but also the complete hydraulic integration, adaptation of the steel structures, replacement of the glycol pumps and optimization of the electrical supply. In addition, it was proposed to combine individual system components in order to reduce maintenance costs and increase energy efficiency.

Planning scope of services:

• Technical inventory and evaluation of existing air conditioning systems
• Conception of the new plant taking into account the legal requirements and site conditions
• Selection of suitable refrigerants with a focus on environmental compatibility, energy efficiency and BAFA eligibility
• Planning of the hydraulic integration including adaptation of the pipes, insulation and pump technology
• Optimization of energy efficiency through frequency-controlled components and sensible system combinations
• Forward-looking electrical planning for the integration of new technology
• Connection to the existing bus system Integration into the bus system was necessary to control and monitor the chiller

Conclusion: Planning with foresight

The holistic planning by cold.world Engineering not only guarantees the long-term operational reliability of the cooling supply – it also ensures environmental compatibility, energy efficiency and legal compliance for the future. The project shows how forward-looking planning sets the course for sustainable building technology.