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ZIBO QIYU AIR CONDITION ENERGY RECOVERY EQUIPMENT CO., LTD.

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ZIBO QIYU AIR CONDITION ENERGY RECOVERY EQUIPMENT CO., LTD. We have kinds of air to air heat exchangers, such as AHU, HRV, heat tube heat exchangers, rotary heat exchangers, steam heating coil, surface air cooler. All these products can be customized, you just need to tell me your requirements, and we have professional model selection software, we can help you choose the most suitable model.
If you're interested in our products, you can look through our website to get further information.
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heat exchanger manufacturer

Air to air heat exchanger made of polymer PP material

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Air to air heat exchanger made of polymer PP material

An air-to-air heat exchanger transfers heat between two air streams without mixing them, often used for energy recovery in ventilation systems, industrial processes, or HVAC applications. When made from polymer polypropylene (PP), it leverages the material’s unique properties to offer a lightweight, corrosion-resistant alternative to traditional metal-based designs.

Why Polypropylene?

    • Corrosion Resistance: PP is highly resistant to chemical degradation, making it ideal for environments with corrosive gases or pollutants where metals like aluminum or steel might degrade.
    • Low Thermal Conductivity: PP has a thermal conductivity of about 0.1–0.22 W/m·K, much lower than metals (e.g., aluminum at ~200 W/m·K). However, this limitation can be offset by designing thin walls and maximizing surface area to enhance heat transfer efficiency.
    • Lightweight: PP’s density (~0.9 g/cm³) makes it significantly lighter than metals, reducing installation and structural support costs.
    • Cost-Effective: PP is generally cheaper than metals like stainless steel or titanium, and its moldability supports scalable production.
  • Temperature Range: PP can operate effectively between -25°C to +100°C (or slightly higher depending on the grade), suitable for many air-to-air applications, though it’s less tolerant of extreme heat compared to metals.

    Air to air heat exchanger made of polymer PP material

    Air to air heat exchanger made of polymer PP material

Air Conditioner for Energy Storage Cabin Cooling

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Air Conditioners for Energy Storage Cabin Cooling

Air Conditioners for Energy Storage Cabin Cooling

Energy storage cabins—housing batteries, inverters, or other heat-generating equipment—require precise cooling to maintain operational efficiency and equipment longevity. These cabins, often used in renewable energy setups (solar farms, wind energy storage), telecom systems, or off-grid power solutions, face unique challenges: compact space, high heat loads, and sometimes remote locations with limited power access. A well-chosen air conditioner ensures temperatures stay within safe ranges (typically 15°C–35°C for lithium-ion batteries) while optimizing energy use.

Air Conditioners for Energy Storage Cabin Cooling

Air Conditioners for Energy Storage Cabin Cooling

Why Wall-Mounted Air Conditioners?

Wall-mounted units, especially ductless mini-split systems, are a top choice for energy storage cabins:

    • Space Efficiency: Mounted high on a wall, they free up floor space in tight cabins (e.g., 10x10 ft or smaller).
    • Targeted Cooling: They cool only the cabin interior, not wasted external areas, unlike central systems.
    • Energy Savings: Inverter-driven compressors adjust cooling output to demand, reducing power draw compared to fixed-speed units.
  • Ease of Setup: No ducts needed—just a small wall hole for refrigerant lines and drainage.

doi cm sang inch

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To convert centimeters (cm) to inches, you can use the following conversion factor:

  • 1 centimeter is approximately equal to 0.394 inches.

Therefore, to convert any measurement in centimeters to inches, you can multiply the number of centimeters by 0.394.

Thermal conductivity of silicon carbide ceramic tiles

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The thermal conductivity of silicon carbide (SiC) ceramic tiles is an important thermal performance parameter, and its specific value may vary depending on factors such as material purity, crystal structure, preparation process (such as sintering method), and temperature. The following is a brief explanation of the thermal conductivity of silicon carbide ceramic sheets:

Typical thermal conductivity range
Pure silicon carbide single crystal: The thermal conductivity is usually between 300-490 W/(m · K), close to or even exceeding copper (about 400 W/(m · K)), making it one of the best known ceramic materials for thermal conductivity.
Polycrystalline silicon carbide ceramics (such as sintered SiC or reaction sintered SiC): The thermal conductivity is generally in the range of 100-270 W/(m · K), depending on the density and impurity content.
Dense sintered SiC: approaching 200-270 W/(m · K).
Reaction sintered SiC (containing a small amount of free silicon): about 100-150 W/(m · K), which decreases slightly due to the low thermal conductivity of silicon (about 150 W/(m · K)).
influence factor
Temperature: The thermal conductivity decreases with increasing temperature. For example, at room temperature (25 ℃), it is 270 W/(m · K), which may decrease to 50-100 W/(m · K) at 1000 ℃.
Grain size and structure: Single crystal SiC has better thermal conductivity than polycrystals, and the more grain boundaries there are, the greater the thermal resistance.
Impurities and additives: If there are non thermal conductive phases (such as oxides or metal residues), the thermal conductivity will decrease.
Preparation process: SiC ceramics prepared by hot pressing sintering, pressureless sintering, or chemical vapor deposition (CVD) exhibit significant differences in performance.
Practical application reference
In industry, silicon carbide ceramic sheets are commonly used in high-temperature heat exchangers, electronic device heat dissipation substrates, etc. Taking common sintered SiC ceramic sheets as an example, the thermal conductivity is mostly between 120-200 W/(m · K), balancing high thermal conductivity and corrosion resistance.

Kiln waste heat recovery and reuse system

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The kiln waste heat recovery and reuse system aims to fully utilize the high-temperature heat in the kiln exhaust gas, and achieve a win-win situation of energy conservation and environmental protection through gas stainless steel cross flow heat exchangers. The core of this solution lies in the use of a stainless steel cross flow heat exchanger, which efficiently exchanges heat between high-temperature exhaust gas and cold air, generating hot air that can be reused.

Working principle: The exhaust gas and cold air flow in a cross flow manner inside the heat exchanger and transfer heat through the stainless steel plate wall. After releasing heat from exhaust gas, it is discharged. Cold air absorbs the heat and heats up into hot air, which is suitable for scenarios such as assisting combustion, preheating materials, or heating.

Advantages:

Efficient heat transfer: The cross flow design ensures a heat transfer efficiency of 60% -80%.
Strong durability: Stainless steel material is resistant to high temperatures and corrosion, and can adapt to complex exhaust environments.
Flexible application: Hot air can be directly fed back to the kiln or used for other processes, with significant energy savings.
System process: Kiln exhaust gas → Pre treatment (such as dust removal) → Stainless steel heat exchanger → Hot air output → Secondary utilization.

This solution is simple and reliable, with a short investment return cycle, making it an ideal choice for kiln waste heat recovery, helping enterprises reduce energy consumption and improve efficiency.

Aluminum oxide powder drying waste heat recovery and reuse system

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During the drying process of alumina powder, a large amount of high-temperature exhaust gas is generated. If it is directly discharged, it not only wastes heat energy but also increases environmental load. The waste heat recovery and reuse system for drying aluminum oxide powder effectively recovers heat from exhaust gas through a gas stainless steel cross flow heat exchanger, achieving energy-saving and environmental protection goals.

Working principle: The system utilizes a stainless steel cross flow heat exchanger to exchange heat between the high-temperature exhaust gas emitted during the drying process and cold air. The exhaust gas and cold air cross flow in the heat exchanger, and the heat is transferred through the stainless steel plate wall. The cold air is heated into hot air, while the exhaust gas is cooled and discharged.

Program features:

Efficient recycling: The cross flow design has a high heat exchange efficiency, reaching 60% -80%, fully utilizing the waste heat of exhaust gas.
Durable: Made of stainless steel material, it is resistant to high temperatures and corrosion, and suitable for the characteristics of aluminum oxide powder drying exhaust gas.
Widely used: Recycled hot air can be used for preheating raw materials, drying assistance, or heating, reducing energy consumption.
Process description: Drying exhaust gas → Dust removal pretreatment (if necessary) → Stainless steel cross flow heat exchanger → Hot air output → Reuse.

This solution has a compact structure and stable operation, making it a practical choice for recovering waste heat from drying aluminum oxide powder, helping enterprises save energy, reduce emissions, and improve efficiency.

Heat Exchanger manufacturer in China

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We are a heat exchanger manufacturer from China, specializing in the production of cross flow and counter current heat exchangers, rotary heat exchangers, and heat pipe heat exchangers. We are widely used in boiler flue gas waste heat recovery, heat pump drying waste heat recovery, food, tobacco, sludge, printing, washing, coating drying waste heat recovery, data center indirect evaporative cooling systems, steam condensation to remove white smoke, large-scale aquaculture energy-saving ventilation, mine exhaust heat extraction, and other fields to meet the needs of different customers. If you have a need for air to air heat exchangers, you can contact us. If there is no confirmed product model, we can help you choose the desired model and customize a waste heat recovery solution according to your needs. Looking forward to your contact.

heat exchanger manufacturer

heat exchanger manufacturer

Cross flow heat exchanger for cooling tower, aluminum foil material heat exchanger

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A cross-flow heat exchanger is a type of heat transfer device where two fluids—typically a gas and a liquid or two gases—flow perpendicular to each other. In the context of a cooling tower, this setup is often used to transfer heat from a warm gas (such as exhaust air or process gas) to a cooler medium (like ambient air or water vapor), facilitating efficient cooling. The "aluminum foil material" suggests the heat exchanger’s core is constructed from thin aluminum sheets or foils, which are commonly used due to their excellent thermal conductivity, lightweight nature, and corrosion resistance when properly treated.

Design and Functionality

In a cross-flow configuration for a cooling tower, the gas (e.g., warm air exiting an industrial process) flows horizontally across the exchanger, while the cooling medium (often ambient air drawn in by the tower’s fans) moves vertically or in a perpendicular direction. The aluminum foil forms the heat transfer surface, typically arranged as plates or fins. These foils create channels that keep the two streams separate, preventing mixing while allowing heat to transfer through the conductive aluminum. The thinness of the foil maximizes surface area for heat exchange while keeping the unit compact.

For cooling tower applications, the exchanger could be integrated into the tower’s air intake or exhaust system. The goal is often to pre-cool the gas before it interacts with the tower’s water-based cooling mechanism or to recover heat from the exhaust for energy efficiency. Aluminum’s thermal conductivity (around 237 W/m·K) ensures efficient heat transfer, and its foil form allows for a high surface-area-to-volume ratio, enhancing performance.

Advantages of Aluminum Foil Material

    • Lightweight and Cost-Effective: Aluminum foil reduces the overall weight and material cost compared to thicker metal constructions.
    • Corrosion Resistance: When coated (e.g., with hydrophilic or epoxy layers), aluminum resists corrosion from moisture or chemicals common in cooling tower environments.
    • High Efficiency: Thin foils increase heat transfer efficiency, though they may trade off some pressure drop, depending on channel spacing.

Application in Cooling Towers

In a cooling tower, a cross-flow gas heat exchanger might serve purposes like:

    • Heat Recovery: Capturing heat from exhaust gas to preheat incoming air or water, reducing energy costs.
    • Pre-Cooling: Lowering the temperature of incoming gas to improve the tower’s evaporative cooling efficiency.
    • Compact Integration: Fitting into space-constrained tower designs due to the foil’s thin profile.

A typical efficiency for a cross-flow heat exchanger ranges from 40-65%, though this depends on factors like flow rates, temperature differences, and foil spacing. For higher efficiency (up to 75-85%), a counter-flow design might be considered, but cross-flow is often chosen for its simplicity and lower cost in cooling tower setups.

Wind Generator Air to Air Indirect Cooling System

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Wind Generator Air to Air Indirect Cooling System

Wind power system background

Wind power is a kind of clean energy, with the characteristics of renewable, pollution-free, large energy and broad prospects. The development of clean energy is the strategic choice of all countries in the world.

However, if the air is directly fed into the generator cabin for cooling, the dust and corrosive gas will be brought into the cabin (Especially wind turbines installed offshore).

Indirect cooling system solution

The indirect cooling method can make the air from inside and outside perform indirect heat exchange to achieve the effect of cooling the wind generator cabin without bringing dust and corrosive gases from outside into the cabin.

The main component of the indirect cooling system is the BXB plate heat exchanger. In the BXB plate heat exchanger, two channels are separated by aluminum foil. The air in the cabin is closed circulation, and the outside air is open circulation. The two airs are doing heat exchange. The air in the cabin transfers heat to the outside air, which reduces the temperature in the wind generator. In addition, the air inside and outside the cabin will not be mixed due to the isolation of aluminum foil, which prevents dust and corrosive gases outside the cabin from being brought into the cabin.

 

Cooling effect analysis

Taking a 2MW unit as an example, the motor's heat generation is 70kW, The circulating air volume in the engine room is 7000m3/h and the temperature is 85℃. The outside circulating air volume is 14000m3/h and the temperature is 40℃. Through the BXB1000-1000 plate heat exchanger, the air temperature in the cabin can be reduced to 47℃ and the heat dissipation capacity can reach 72kW. The relevant parameters are as follows:

Wind Generator Air to Air Indirect Cooling System(图1)

Introduction to indirect cooling system

Wind Generator Air to Air Indirect Cooling System(图2)

Wind Generator Air to Air Indirect Cooling System(图3)

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