SYCHEM develops geoexchange energy systems that use seawater, groundwater, or hybrid configurations as a renewable thermal source for heating, cooling, domestic hot water, pools, and HVAC applications. Particularly suited to coastal facilities and hotel complexes, these systems replace conventional air-cooled approaches with water-source heat pump solutions designed to improve energy efficiency and reduce operating costs.
With deep technical experience in complex hospitality energy projects, SYCHEM manages the full lifecycle of large-scale seawater geoexchange systems, from design and construction to commissioning and BMS integration, for landmark projects in Greece, including Elounda Mare, Belvedere Royal & Imperial Hotels, and Arina Beach Resort.
By combining geoexchange, heat recovery, solar thermal systems, desalination, and central energy management, SYCHEM delivers integrated energy solutions that turn local water resources into a stable, efficient, and low-impact source of heating and cooling.
In SYCHEM’s open-loop geoexchange systems, the source-water circuit is engineered as a dedicated hydraulic and thermal subsystem, rather than as a conventional water intake.
For seawater applications, the design may include nearshore or offshore abstraction, coastal wells, return pipelines, duplex pumping arrangements, coarse screening, self-cleaning filtration where required, anti-fouling provisions, intermediate plate heat exchangers and materials selected for saline-water service.
For groundwater applications, the system design is based on production and reinjection wells, sustainable aquifer yield, drawdown, reinjection capacity, hydraulic interference, thermal breakthrough risk and long-term well performance. The source side is dimensioned according to available water temperature, design flow, allowable temperature differential, pumping head, heat exchanger approach temperature, fouling factor, salinity, suspended solids, scaling tendency and the required evaporator / condenser conditions of the heat-pump or chiller plant.
The energy performance of the installation is determined by the interaction between the source-water loop, the heat-exchange interface and the building-side hydronic network. By maintaining stable entering-water temperatures to the heat pumps or chillers, the system reduces compressor lift and improves seasonal efficiency compared with air-cooled heat rejection, particularly during peak cooling periods.
The hydraulic design must therefore minimize parasitic pumping energy, maintain correct flow through the heat exchangers and protect the equipment from fouling, corrosion and unstable operating conditions. Variable-speed pumps, differential-pressure control, temperature-based sequencing, bypass control, heat-exchanger ΔT monitoring and automated alarm logic are used to maintain the required operating envelope under changing loads.
In hybrid installations, the geoexchange plant is coordinated with the wider thermal-energy infrastructure of the facility. The system can operate as the primary heat sink for cooling, as a heat source for heating and domestic hot water production, or as part of a heat-recovery strategy where rejected heat from chillers is redirected to DHW, pools or other low-temperature thermal loads.
Through BMS / PLC integration, SYCHEM can control source-water pumps, circulation pumps, motorized valves, heat exchangers, heat pumps, chillers, thermal storage, auxiliary boilers and safety interlocks under project-specific operating sequences. This allows the plant to switch between cooling, heating, heat-recovery and auxiliary modes while maintaining temperature setpoints, hydraulic stability and energy-priority logic across the full seasonal operating profile.
