Our Geothermal Spiral Tube Coil Heat Exchanger is specifically engineered to meet the demanding requirements of water-source and ground-source heat pump (GSHP) systems. Designed for dual-function versatility, this compact heat exchanger operates seamlessly as either an evaporator or a condenser, delivering optimized thermal transfer efficiency for both heating and cooling cycles.
Key Features & Technical Advantages
- High Thermal Efficiency: The spiral inner tube structure generates high turbulence within fluid flows, breaking boundary thermal layers to achieve maximum heat transfer coefficients while preventing sediment accumulation.
- Compact & Space-Saving Design: Featuring a coiled, space-efficient configuration, this coaxial unit fits easily inside packaged ground-source heat pump cabinets without sacrificing heat transfer surface area.
- Corrosion-Resistant Construction: Built with premium-grade copper inner tubing and rugged outer shell materials, it withstands harsh groundwater conditions, mineral scaling, and continuous thermal cycling.
- Anti-Freezing Resilience: The specialized spiral tube configuration allows for slight expansion during accidental low-temperature freezing events, significantly reducing the risk of frost cracking compared to traditional brazed plate heat exchangers.
- Flexible OEM Customization: We offer full customization for mounting brackets, copper connecting pipe diameters, Swagelok or threaded fittings, and specialized surface coatings to fit your exact system assembly needs.
Applications
- Ground-Source Heat Pumps (GSHP)
- Water-Source Heat Pumps (WSHP)
- Geothermal Water Heating & Cooling Units
- Industrial Process Water Chiller Systems
- Swimming Pool Heat Pumps
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Frequently Asked Questions (FAQ)
Q1: How does a coaxial heat exchanger work in a ground-source heat pump system?
A: A coaxial heat exchanger consists of two concentric tubes. In a geothermal heat pump system, water or glycol solution from the ground loop flows through the inner tube, while refrigerant flows in the opposite direction (counter-flow) through the outer space between the inner and outer tubes. This counter-flow design optimizes heat exchange efficiency, allowing heat to be absorbed from or rejected into the ground water efficiently.
Q2: What are the main benefits of using a coaxial heat exchanger over a plate heat exchanger for geothermal applications?
A: Coaxial heat exchangers offer superior resistance to clogging, freezing, and pressure fluctuations. Because groundwater often contains minerals, sand, or impurities, narrow plate heat exchangers can clog easily. The continuous, unobstructed channel of a coaxial exchanger handles water quality variations far better and minimizes water-side pressure drop.
Q3: Can this coaxial heat exchanger be used as both an evaporator and a condenser?
A: Yes. The unit is designed for dual operation. During the heating season, it functions as an evaporator by extracting heat from the ground water. During the cooling season, the refrigeration cycle reverses, and the unit functions as a condenser to reject heat into the ground.
Q4: Do you offer custom connection sizes and mounting options for OEM orders?
A: Absolutely. As a direct HVACR manufacturer, we support complete OEM customization. We can adjust the copper tube diameters, fitting types (solder connection, threaded ports, or custom Swagelok integration), mounting bracket positions, and outer finish specifications to match your exact chassis design.
Q5: What inner tube materials are available for harsh or corrosive water conditions?
A: While standard models utilize high-grade copper for excellent thermal conductivity, we also offer Cupronickel (Cu-Ni 90/10) for brackish water and pure Titanium (TI) for highly aggressive, high-salinity, or chemical-rich fluid applications.