0 - 2024 - Industrial purification heat recovery

How to improve the thermal energy quality of waste heat recovery heat pumps?

The waste heat recovery heat pump utilizes a compressor to do work, elevating low-temperature heat energy to high-temperature heat energy, thereby improving the quality of heat energy. Specifically, there are two main ways for waste heat recovery heat pumps to improve thermal energy quality:

Increase the temperature of thermal energy
The waste heat recovery heat pump can increase the low-temperature waste heat (such as 60 ℃) to high-temperature thermal energy (such as 90 ℃), meeting the application needs of higher temperatures. For example, a waste heat recovery heat pump can recover and utilize the waste heat from industrial waste gas for heating or hot water preparation.
Improve the utilization rate of thermal energy
The waste heat recovery heat pump can extract the available heat from low-temperature waste heat and transfer it to high-temperature heat energy, improving the utilization rate of heat energy. For example, waste heat recovery heat pumps can recycle the waste heat from data centers for cooling or heating purposes.
The advantages of waste heat recovery heat pumps in improving thermal energy quality:
Energy saving: Waste heat recovery heat pumps can utilize waste low-temperature heat energy, reduce the use of fossil fuels, and improve energy efficiency.
Environmental protection: Waste heat recovery heat pumps can reduce greenhouse gas emissions, which is beneficial for environmental protection.
Economy: Waste heat recovery heat pumps can reduce production costs and improve economic benefits.
Application of waste heat recovery heat pumps:
Industry: Industrial waste heat recovery and industrial hot water recovery
Architecture: Building heating, building hot water preparation
Data Center: Data Center Waste Heat Recovery
With the continuous improvement of energy conservation and emission reduction requirements, the application of waste heat recovery heat pumps will become increasingly widespread.

Heat recovery heat exchanger for coating waste heat in the production of heat shrink film

In the production process of heat shrink film, the coating process usually generates a large amount of waste heat, which can be effectively utilized through waste heat recovery heat exchangers to improve energy efficiency and reduce production costs. The following is the general working principle and advantages of a waste heat recovery heat exchanger during the coating process of heat shrink film production:

Working principle

In the production of heat shrink film, the coating process is often accompanied by the generation of high-temperature exhaust gas, which carries a large amount of heat energy. The working principle of a waste heat recovery heat exchanger is to utilize the heat in these high-temperature exhaust gases and transfer it to fresh air or other media through heat exchange, thereby achieving energy reuse.
The specific work steps are as follows:

Waste gas collection: The generated high-temperature waste gas is collected through pipelines or ventilation systems and transported to the waste heat recovery heat exchanger.
Heat exchange process: Within the waste heat recovery heat exchanger, high-temperature exhaust gas exchanges heat with fresh air or other fluids. Thermal energy is transferred from the exhaust gas to a new medium, causing it to heat up.
Energy reuse: After heat exchange, the heat in the exhaust gas is transferred to a new medium, which can be used to heat the parts that need to be heated in the production process, such as drying equipment or preheating equipment.

Advantages

Energy conservation and emission reduction: The use of waste heat recovery heat exchangers can effectively recover thermal energy from exhaust gas, reduce energy consumption, and reduce emissions such as carbon dioxide, meeting the requirements of energy conservation and emission reduction.
Reduce production costs: By recycling and utilizing the heat energy in exhaust gas, the dependence on external energy can be reduced, production costs can be lowered, and production efficiency can be improved.
Environmental protection and sustainable development: It can minimize the waste of heat energy and minimize its impact on the environment, in line with the concept of sustainable development.
Improving the working environment: Reducing exhaust emissions and heat loss can help improve the working environment on the production site, enhance employee comfort and safety.
Simple and stable operation: The operation of the waste heat recovery heat exchanger is relatively simple and stable, without excessive manual intervention, and can operate continuously and stably.
By applying waste heat recovery heat exchangers, the waste heat generated during the coating process of heat shrink film production can be effectively utilized, bringing many economic and environmental benefits. However, specific applications and designs need to be comprehensively considered and optimized based on production processes, waste heat characteristics, and actual needs to achieve the best energy recovery effect.

Hebei Yixue Refrigeration Technology Co., Ltd.

Hebei Yixue Refrigeration Technology Co., Ltd. is located at No. 13, Weixian Economic Development Zone, Zhangjiakou City, Hebei Province, with a registered capital of 50 million yuan. It is a modern service provider that integrates cold and hot technology research and development, cold chain logistics equipment manufacturing, cold chain warehousing, and smart logistics services. The company currently has 37 employees and a factory area of over 30000 square meters. Mr. Wei Runhua, the founder, has been engaged in the refrigeration industry for 37 years, dedicated to the research and manufacturing of refrigeration equipment.
About Us
The company has obtained ISO9001, ISO45001, ISO14001 and intellectual property system certifications, and its products have obtained EU CE certification. It currently has more than 20 invention patents, software works, and books and publications. It is a full industry chain company that integrates high-end equipment manufacturing, refrigeration technology research and development, and cold chain logistics services.
Since its strategic transformation in 2021, Yixue has established a city level industrial design center, a city level cold and hot technology center, and an innovation center. It has been rated as a national high-tech enterprise, a "specialized, refined, unique, and new" small and medium-sized enterprise, and an intellectual property advantage enterprise in Hebei Province.
The enterprise has won the Global Top 20 Food Loss Reduction Competition of the Food and Agriculture Organization of the United Nations (FAO) and has been shortlisted for the National Competition of the China Innovation and Entrepreneurship Competition (High end Equipment Manufacturing Field). It has been reported by 34 official media outlets, including People's Daily, Xinhua News, China Daily, Economic Daily, Hebei Daily, Zhangjiakou News, as well as government agencies such as Hebei Provincial Department of Commerce, Hebei Provincial Department of Science and Technology, and Hebei Provincial Federation of Overseas Chinese.

Where are aluminum alloy condensing heat exchangers used

Aluminum alloy condensing heat exchangers are mainly used in the following fields:

Gas wall mounted boiler: Aluminum alloy condensing heat exchanger is an important component of gas wall mounted boiler. It utilizes the heat generated by the condensation of water vapor in the exhaust gas generated by gas combustion to improve the thermal efficiency of gas wall mounted boiler.

Heat pump: Aluminum alloy condensing heat exchanger is an important component of heat pump, which utilizes the heat generated by refrigerant evaporation and condensation in the heat pump system for heating or cooling.

Industrial boiler: Aluminum alloy condensing heat exchanger is an important component of industrial boiler, which utilizes the heat generated by the condensation of water vapor in the high-temperature exhaust gas of industrial boiler to improve the thermal efficiency of industrial boiler.

Air source heat pump: Aluminum alloy condensing heat exchanger is an important component of air source heat pump, which utilizes the heat generated by the condensation of water vapor in the air for heating or cooling.

Water source heat pump: Aluminum alloy condensing heat exchanger is an important component of water source heat pump, which utilizes the heat generated by the condensation of water vapor in water for heating or cooling.

Aluminum alloy condensing heat exchangers have the following advantages:

High thermal efficiency: Aluminum alloys have high thermal conductivity, which can effectively improve heat exchange efficiency.

Good corrosion resistance: Aluminum alloy has good corrosion resistance and can resist corrosive media in gas wall mounted boilers, heat pumps, and other systems.

Lightweight: Aluminum alloy has a low density, which can reduce the weight of heat exchangers.

Therefore, aluminum alloy condensing heat exchangers have broad application prospects in the above-mentioned fields.

Plate heat exchanger automated assembly line

The automated production line for plate heat exchangers is an important component of the industrial refrigeration field. In the past, there were a large number of manual operations and tedious word testing work in the production process. However, with the introduction of intelligent technology, this traditional production line is showing new vitality. Automated production lines not only reduce manual labor intensity, but also greatly improve production efficiency and product quality. Through the application of intelligent control systems, the performance and stability of refrigeration equipment have been significantly improved.
Faced with increasingly fierce market competition, automated medium voltage production lines are also constantly exploring the path of intelligent development. There are many problems with manual stamping production lines, such as low production efficiency and difficulty in ensuring quality. The emergence of automated medium voltage production lines has completely changed the traditional production mode. Through the accurate positioning and high-speed stamping of intelligent robots, production efficiency has been greatly improved. At the same time, the application of automation control systems effectively ensures the dimensional accuracy and consistency of products, improving product quality and customer satisfaction.
Intelligent re evolution is the optimization and improvement of traditional automated production lines. Although traditional automated production lines can complete certain tasks, they have certain limitations for complex and changing production environments and demands. However, intelligent re evolution fundamentally improves the flexibility and adaptability of production lines by introducing technologies such as artificial intelligence and big data analysis. For example, intelligent stamping production lines can automatically adjust process parameters and mold configurations by learning and analyzing historical data, achieving rapid switching and production for different products.
The re evolution of intelligence is not achieved overnight. In practical applications, we still face a series of challenges and difficulties. Firstly, the research and development of intelligent devices and departmental monitoring require high investment, which is a significant challenge for individuals. Secondly, the application of intelligent technology involves issues such as data security and privacy protection, requiring reasonable solutions. At the same time, the reliability and stability of intelligent devices also need to be continuously improved to ensure the safety and controllability of the production process.

Plate heat exchanger automated assembly line

Calculation method for waste heat recovery from exhaust gas

There are two main approaches to calculate the potential for waste heat recovery from exhaust gas:

1. Thermodynamic Approach:

This method uses the principles of thermodynamics to determine the theoretical maximum amount of heat that can be recovered. Here's what you need to consider:

Mass flow rate (ṁ) of the exhaust gas (kg/s) - This can be obtained from engine specifications or measured with a flow meter.
Specific heat capacity (Cp) of the exhaust gas (kJ/kg⋅K) - This value varies with temperature and needs to be obtained from tables or thermodynamic software for the specific gas composition of your exhaust.
Inlet temperature (T_in) of the exhaust gas (°C) - Measured with a temperature sensor.
Outlet temperature (T_out) of the exhaust gas after heat recovery (°C) - This is the desired temperature after heat is removed for your chosen application (e.g., preheating combustion air, generating hot water).

Heat recovery potential (Q) can be calculated using the following formula:

Q = ṁ * Cp * (T_in - T_out)

2. Simplified Approach:

This method provides a rough estimate and is easier to use for initial assessments. It assumes a specific percentage of the exhaust gas energy can be recovered. This percentage can vary depending on the engine type, operating conditions, and the chosen heat exchanger efficiency.

Estimated heat recovery (Q) can be calculated with:

Q = Exhaust gas energy content * Recovery factor

Exhaust gas energy content can be estimated by:

Exhaust gas energy content = Mass flow rate * Lower heating value (LHV) of the fuel

Lower heating value (LHV) is the amount of heat released during combustion when the water vapor formed condenses (available from fuel specifications).

Recovery factor is a percentage typically ranging from 20% to 50% depending on the engine type, operating conditions, and the chosen heat exchanger efficiency.

Important Notes:

These calculations provide theoretical or estimated values. The actual heat recovery may be lower due to factors like heat exchanger inefficiencies and piping losses.
The chosen outlet temperature (T_out) in the thermodynamic approach needs to be realistic based on the application and limitations of the heat exchanger.
Safety considerations are crucial when dealing with hot exhaust gases. Always consult with a qualified engineer for designing and implementing a waste heat recovery system.

Additional factors to consider:

Condensation: If the exhaust gas temperature drops below the dew point, water vapor will condense. This can release additional latent heat but requires proper condensate management.
Fouling: Exhaust gas can contain contaminants that can foul heat exchanger surfaces, reducing efficiency. Regular cleaning or choosing appropriate materials may be necessary.

By understanding these methods and factors, you can calculate the potential for waste heat recovery from exhaust gas and assess its feasibility for your specific application.

stainless steel cooling tower fill

　　Stainless steel is a specific type of metal used for cooling tower fill.
　　Stainless steel cooling tower fillis used in special applications where extreme temperatures or flammability concerns restrict the use of plastic materials.They are also preferred in environments with harsh chemicals or high chlorination levels in the water.

　　Here are some of the benefits of using stainless steel cooling tower fill:
　　Durability:Stainless steel is highly resistant to corrosion and wear,making it a long-lasting option for cooling towers.
　　High-temperature resistance:Stainless steel can withstand high water temperatures,making it suitable for use in industrial applications.
　　Fire resistance:Stainless steel is non-combustible,which is important for facilities with fire safety concerns.
　　Chemical resistance:Stainless steel is resistant to many chemicals,making it suitable for use in harsh environments.
　　However,there are also some drawbacks to using stainless steel cooling tower fill:
　　Cost:Stainless steel is more expensive than other materials commonly used for cooling tower fill,such as PVC or polypropylene.
　　Weight:Stainless steel is heavier than other materials,which can add to the overall weight of the cooling tower.
　　Heat transfer:Stainless steel is not as good a conductor of heat as some other materials,which can slightly reduce the efficiency of the cooling tower.
　　Overall,stainless steel cooling tower fill is a good option for applications where durability,high-temperature resistance,fire resistance,and chemical resistance are important.However,the higher cost and weight of stainless steel should be considered before making a decision.

An industrial heat recovery manufacturer from China

An industrial heat recovery manufacturer from China, focusing on the production of gas-to-gas plate heat exchangers, which are widely used in boiler flue gas waste heat recovery, food, tobacco, sludge, printing, washing, coating and drying waste gas waste heat recovery, data center indirect Evaporative cooling systems, water vapor condensation and whitening, large-scale breeding energy-saving ventilation and other fields can meet the needs of different customers. Welcome to write to us for consultation. Contact kuns913@gmail.com, WhatsApp: +8615753355505

Rotary/Wheel Energy Recovery Heat Exchanger

There are two types of rotary energy recovery heat exchangers:full heat type and sensible heat type.As a heat storage core,the fresh air passes through a semicircle of the wheel,while the exhaust air passes through another semicircle of the wheel,and the fresh air and exhaust air pass through the wheel alternately in this way.
in winter,the wheel regenerative body absorbs heat from the exhaust(wet),when moved to fresh air side,due to reasons of the poor temperature(wet),regenerative core body would release quantity of heat(wet),when to exhaust side,and continue to absorb the heat in exhaust quantity(wet).The energy recovery is achieved by such a repeated cycle,and the working principle is shown in the figure.During the summer cooling operation,the process is reversed.
When the full heat wheel runs,water molecules in the air are absorbed into the molecular sieve coating on the surface of the honeycomb,and when they are transferred to the other side,they are released due to the pressure difference between the water molecules.

The all-heat type runner USES the fresh air to exchange sensible heat and latent heat,so as to save energy and keep good ventilation in the room.The fresh air can be pre-cooled and dehumidified in summer and preheated and humidified in winter.

Air to Air Total Plate Heat Exchanger-BQC series

Structural characteristics of
·BQC type all-heat exchanger adopts cross countercurrent structure,with air partially cross flow and partially relative reverse flow.The new exhaust air is completely separated to avoid any transfer of odor and moisture;
·The all-heat exchanger USES ABS plastic frame,which is beautiful,has high strength,is not easy to be damaged,has a long service life,is environmentally friendly and has good sealing,which ensures the structural strength and tightness of the heat exchanger,and reduces the mixing of new exhaust air;
·The full heat exchange paper is made of imported non-porous film paper(ER paper)and processed by a special process.It is characterized by good air tightness,high heat transfer efficiency,tear resistance,aging resistance,corrosion resistance and antibacterial;
·All connections of the heat exchanger chip are sealed with sealant to ensure air tightness of the heat exchanger;
·It can be cleaned by vacuum cleaner and compressed air,easy to use and simple to maintain;
·Heat exchangers of various specifications and sizes can be developed according to user requirements.

Application and application mode
·AC Ventilation System
·Room Ventilation System
·Industrial Ventilation System
·Heat Pump Drying System
·Indirect Evaporative Cooling System
·Large-scale Scientific Breeding Bystem
·Purify Air Conditioning Fresh Air System
·Wind Generator Air to Air Indirect Cooling System
·Heat Recovery in Winter
·Cold Recovery in Summer

Industrial purification heat recovery

Yearly Archive 2024-04-11

How to improve the thermal energy quality of waste heat recovery heat pumps?

Heat recovery heat exchanger for coating waste heat in the production of heat shrink film

Working principle

Advantages

Hebei Yixue Refrigeration Technology Co., Ltd.

Where are aluminum alloy condensing heat exchangers used

Plate heat exchanger automated assembly line

Calculation method for waste heat recovery from exhaust gas

stainless steel cooling tower fill

An industrial heat recovery manufacturer from China

Rotary/Wheel Energy Recovery Heat Exchanger

Air to Air Total Plate Heat Exchanger-BQC series

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