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The Exchanger for Cold and Hot Water Evaporator is a dual-purpose heat transfer system designed to optimize energy efficiency in heating and cooling cycles. It facilitates simultaneous heat exchange between two water streams, making it ideal for district heating, industrial processes, and renewable energy systems.
The exchanger uses a countercurrent flow arrangement—where hot and cold streams flow in opposite directions—to achieve a temperature approach as low as 2°C, maximizing energy recovery. This design reduces energy consumption by 30% compared to parallel-flow models, with proven performance in district heating networks across Europe . Computational fluid dynamics (CFD) simulations ensure optimal flow distribution within the unit.
With a heat transfer coefficient of 3,500 W/(m²·K), the unit handles flow rates up to 500 m³/h while maintaining consistent temperature control (±0.5°C). The stainless steel plates—grade 316L for enhanced corrosion resistance—ensure durability in corrosive environments, such as water with high mineral content.
The modular plate design—with plates stacked vertically—allows for easy expansion (up to 100 plates) and occupies 40% less space than shell-and-tube exchangers. It is suitable for retrofitting existing systems without major modifications, with a standard footprint of 1.2m x 0.8m for mid-capacity models.
The exchanger minimizes pumping power with a pressure drop of ≤0.1 bar across the entire flow range, reducing operational costs in large-scale applications. The optimized plate geometry—with 0.5mm micro-channels—ensures efficient flow without excessive resistance.
District Heating: Recovers waste heat from power plants for residential heating, serving up to 5,000 households per unit in urban areas.
Industrial Processes: Used in chemical reactors and food processing (e.g., brewery pasteurization) for precise temperature regulation.
Solar Thermal Systems: Integrates with solar collectors to store and distribute heat, with compatibility with both flat-plate and vacuum-tube systems.
HVAC Systems: Balances heating and cooling loads in commercial buildings, such as shopping malls and airports, reducing reliance on fossil fuels.
Q: How does the counterflow design improve efficiency?
A: By maintaining a constant temperature gradient between the fluids throughout the exchanger length, the counterflow design ensures continuous heat transfer even as temperatures approach equilibrium. This results in a 25% higher energy recovery rate compared to cross-flow designs, validated in independent testing .
Q: Can the exchanger handle high-temperature water?
A: Yes. The unit operates efficiently with water temperatures up to 120°C and is resistant to thermal stress from rapid temperature changes (±20°C/hour). It is certified for use in industrial boilers and solar thermal systems with high-temperature outputs.
Q: What is the recommended material for corrosive fluids?
A: For aggressive media (e.g., seawater, acidic solutions), a titanium-plated version is available, offering superior corrosion resistance (tested to withstand 5,000 hours of salt spray) and a service life of 20+ years. Gasket materials are also customizable—EPDM for general use, Viton for high temperatures.
