Energy-saving additive for heat exchange system and preparation method and application thereof

Abstract

The present application relates to heat exchange medium energy-saving additive technical field, specifically for a kind of energy-saving additive for heat exchange system and its preparation method and application, the energy-saving additive includes following weight parts component: main surfactant: 2-20 parts;Scale inhibitor: 0-30 parts;Coupling agent: 0-30 parts;Regulator: 0-30 parts;Surface tension control agent: 0-20 parts;Auxiliary surfactant: 0-10 parts;Dispersing agent: 20-30 parts;Defoaming agent: 0-10 parts.By the scientific compounding and synergistic effect of main surfactant and other surface active components, the surface tension of water-based heat exchange medium can be significantly reduced to a very low level of 27.68mN / m.Greatly improve the wettability and spreadability of medium in the inner wall of heat exchanger, so that it can quickly cover the heat exchange surface to form a uniform thin liquid film, effectively eliminate or thin the liquid film thermal resistance that hinders heat transfer.

Description

Technical Field

[0001] This invention relates to the field of energy-saving additives for heat exchange media, specifically to an energy-saving additive for heat exchange systems, its preparation method, and its application. Background Technology

[0002] In heat exchange systems such as central air conditioning, industrial cooling water circulation systems, and heating systems, which use water as the primary heat exchange medium, improving heat exchange efficiency is a key way to achieve energy conservation and consumption reduction. Traditional techniques mainly rely on increasing the pump head and flow rate to reduce the thickness of the laminar sublayer by increasing the fluid velocity and enhancing the scouring effect on the inner wall of the heat exchanger, thereby reducing thermal resistance. However, this method significantly increases the power consumption of the pump.

[0003] To improve heat exchange efficiency more effectively, energy-saving additive technology has emerged. Most existing energy-saving additives incorporate conventional surfactants, which promote the spreading and wetting of fluids on the heat exchange surface by reducing flow resistance or surface tension. However, existing energy-saving additives have some shortcomings. Firstly, their surface tension-reducing effect is poor, resulting in a limited improvement in heat exchange efficiency. Secondly, the introduced surfactants can cause the formation of large amounts of stable foam within the heat exchange system. This foam accumulates in the system, leading to pump cavitation, idling, and a series of malfunctions such as localized dry burning of the heat exchanger and deterioration of heat transfer.

[0004] In view of this, we propose an energy-saving additive for heat exchange systems, its preparation method and application. Summary of the Invention

[0005] The purpose of this invention is to provide an energy-saving additive for heat exchange systems, its preparation method and application, which solves the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: An energy-saving additive for heat exchange systems includes an energy-saving additive comprising the following components in parts by weight. Main surfactant: 2-20 parts; Scale inhibitor: 0-30 parts; Coupling agent: 0-30 parts; Regulator: 0-40 parts; Surface tension control agent: 0-20 parts; Auxiliary surfactant: 0-10 parts; Dispersant: 20-30 parts; Defoamer: 0-10 parts.

[0007] Preferably, the main surfactant is fluorocarbon polyoxyethylene ether, and the component is 10-20 parts by weight; The scale inhibitor is an organophosphate compound, and the component is 20-25 parts by weight; The coupling agent is an alcohol ether, and the weight components are 5-10 parts; The regulator is polyol, and the component by weight is 20-30 parts; The dispersant is an acrylic compound, and its weight components are 20-25 parts.

[0008] Preferably, the main surfactant is polyoxyethylene monotridecylfluorooctyl ether, and the surface tension control agent is ethoxylated acetylene glycol.

[0009] Preferably, the regulator is one or more of polyethylene glycol 200, polyethylene glycol 400, polyethylene glycol 600, polypropylene glycol 200, and polypropylene glycol 400, and the defoamer is one or more of heptamethyltrisiloxane, ethoxylated trisiloxane, and polyether-modified trisiloxane.

[0010] Preferably, the glycolipid is one or a combination of phycolipid, cellobiose, and sophorolipid.

[0011] Preferably, the scale inhibitor is one or a combination of phosphonobutane tricarboxylic acid, hydroxyethylidene diphosphonic acid, and aminotrimethylphosphonic acid.

[0012] Preferably, the coupling agent is one or a combination of fatty alcohol polyoxyethylene ether, secondary alcohol polyoxyethylene ether, and fatty alcohol polyoxyethylene propylene ether, and the dispersant is one or a combination of two of polyacrylic acid and sodium polyacrylate.

[0013] Preferably, the main surfactant is polyoxyethylene monotridecylfluorooctyl ether, and the component is 20 parts by weight; The regulator is polyethylene glycol 200, and the component is 30 parts by weight; The dispersant is polyacrylic acid, and the component is 20 parts by weight; The scale inhibitor is phosphonobutane tricarboxylic acid, and the component is 20 parts by weight; The coupling agent is fatty alcohol polyoxyethylene propylene ether, and the component is 10 parts by weight.

[0014] A method for preparing an energy-saving additive for a heat exchange system, the method comprising mixing several of a main surfactant, scale inhibitor, coupling agent, regulator, surface tension control agent, auxiliary surfactant, dispersant, and defoamer, stirring evenly to obtain the energy-saving additive.

[0015] An application of an energy-saving additive for heat exchange systems, wherein the energy-saving additive for heat exchange systems is applied to a heat exchange system using water as the heat exchange medium.

[0016] By employing the above technical solution, the present invention provides an energy-saving additive for heat exchange systems, its preparation method, and its application, which have at least the following beneficial effects: (1) Through the scientific compounding and synergistic effect of the main surfactants and other surface-active components, this invention can significantly reduce the surface tension of the water-based heat exchange medium to an extremely low level of 27.68 mN / m. This greatly improves the wettability and spreadability of the medium on the inner wall of the heat exchanger, enabling it to quickly cover the heat exchange surface to form a uniform thin liquid film, effectively eliminating or reducing the liquid film thermal resistance that hinders heat transfer.

[0017] (2) Through the rational combination of various components, this invention has successfully achieved a technological breakthrough in low foaming, which can control the foam height in the heat exchange system to an extremely low level, and the small amount of foam generated can dissipate naturally and quickly. This fundamentally avoids the risk of pump idling and partial dry burning of heat exchangers caused by foam accumulation, greatly improves the stability and reliability of heat exchange equipment operation, and ensures the effective realization of energy-saving benefits.

[0018] (3) The energy-saving additive of the present invention exhibits a low contact angle on the surfaces of various materials such as glass and paint, demonstrating its excellent wetting, spreading, emulsifying, and dispersing properties. Simultaneously, this energy-saving additive possesses excellent temperature resistance; after continuous operation at 140°C for 24 hours, its core performance degradation rate is less than 10%, ensuring its long-term effectiveness and stability under high-temperature heat exchange conditions. Furthermore, the aqueous solutions of the energy-saving additives in all embodiments are neutral, non-corrosive to system equipment, have good compatibility, and are safe to use. Attached Figure Description

[0019] The accompanying drawings, which are provided to further illustrate the invention, constitute a part of this application: Figure 1 This is a schematic diagram illustrating the defoaming effect of the present invention; Figure 2 This is a schematic diagram of the hydrophobic angle detection method of the present invention. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] An energy-saving additive for heat exchange systems, the energy-saving additive comprising the following components in parts by weight: Main surfactant: 2-20 parts; preferably, main surfactant: 10-20 parts; the main surfactant is polyoxyethylene monotridecylfluorooctyl ether.

[0022] Scale inhibitor: 0-30 parts; preferably, scale inhibitor: 20-25 parts; the scale inhibitor is one or more of phosphonobutane tricarboxylic acid, hydroxyethylidene diphosphonic acid, and aminotrimethylphosphonic acid.

[0023] Coupling agent: 0-30 parts; preferably, coupling agent: 5-10 parts; the coupling agent is one or more of fatty alcohol polyoxyethylene ether, secondary alcohol polyoxyethylene ether, and fatty alcohol polyoxyethylene propylene ether.

[0024] Regulator: 0-40 parts; preferably, regulator: 20-40 parts; the regulator is one or more of polyethylene glycol 200, polyethylene glycol 400, polyethylene glycol 600, polypropylene glycol 200, and polypropylene glycol 400.

[0025] Surface tension control agent: 0-20 parts, the surface tension control agent is ethoxylated acetylene glycol.

[0026] Auxiliary surfactant: 0-10 parts; the auxiliary surfactant is one or more of trehalose lipids, cellobiose lipids, and sophorolipids.

[0027] Dispersant: 20-30 parts; preferably, dispersant: 20-25 parts; the dispersant is one or a combination of two of polyacrylic acid and sodium polyacrylate.

[0028] Defoamer: 0-10 parts; the defoamer is one or more of heptamethyltrisiloxane, ethoxylated trisiloxane, and polyether-modified trisiloxane.

[0029] A method for preparing an energy-saving additive for heat exchange systems includes mixing several of the following: a main surfactant, a scale inhibitor, a coupling agent, a regulator, a surface tension control agent, an auxiliary surfactant, a dispersant, and a defoamer, and stirring until homogeneous to obtain the energy-saving additive.

[0030] Accurately weigh each component according to the formula. Crush and sieve solid raw materials to ensure uniform dispersion. Dry raw materials with excessive moisture content.

[0031] Mix and stir, adding the regulator as the base solvent into a reactor equipped with a stirring and heating jacket. While stirring at a low speed of 100 rpm, add the main surfactant, coupling agent, surface tension control agent, and defoamer sequentially. Stir for 10 minutes after each addition to ensure complete dissolution or dispersion. Slowly add the scale inhibitor and auxiliary surfactant, simultaneously increasing the stirring speed to 400 rpm to promote mixing. Add the dispersant slowly and in batches. At this point, the system viscosity increases; maintain a higher stirring speed of 600 rpm and heat to 50°C via the jacket to reduce viscosity, ensuring complete dissolution and the absence of fish-eye-like gel particles. Continue stirring until the system is a homogeneous, transparent or translucent viscous liquid, without layering or visible particles. After homogeneous mixing, stop stirring and allow the product to stand in the reactor for 4 hours to allow the components to fully interact and reach a stable state. After maturation, filter through a 100-200 mesh screen to remove any trace impurities or incompletely dissolved particles, ensuring product clarity. The preparation of the energy-saving additive is then complete.

[0032] An application of an energy-saving additive for heat exchange systems involves applying the additive to a water-based heat exchange system. The additive is added to the water at a ratio of 0.01%-0.1% of the circulating water mass, preferably 0.05%. Before adding the additive, the heat exchange system should be evaluated, and current operating parameters, including inlet and outlet water temperatures, flow rates, total system water capacity, and pump current, should be recorded as a benchmark for energy-saving effect evaluation. If the system has severe scale or biological slime buildup, chemical cleaning and pre-filming are recommended to ensure clean heat exchange surfaces, allowing the energy-saving additive to act directly on the metal surface for optimal effect. The total circulating water volume of the system should be accurately calculated or determined from the system design drawings. Based on the recommended concentration in the selected embodiment, the required mass of energy-saving additive should be calculated.

[0033] Calculation formula: Energy-saving additive dosage (kg) = Total circulating water volume of the system (tons) × Addition concentration (%) × 10.

[0034] The addition point should be selected on the system's return water pipeline, preferably before the water pump inlet or in a location with rapid water flow and easy mixing, such as the cooling tower sump. Avoid direct addition to elevated water tanks or stagnant areas. For systems with dosing equipment, the energy-saving additive can be continuously and slowly added to the system via a metering pump to maintain a stable concentration. For systems without dosing equipment, the calculated energy-saving additive should first be diluted 10 times with system water and mixed thoroughly in a dedicated container. Then, while the system circulation pump is running, slowly pour it into the addition point, using the water flow to rapidly mix it evenly. This process can take several hours to a day to complete.

[0035] After addition, the system should continue to run. During the initial 72 hours, closely monitor the system's operation, especially pressure changes and foaming. Check the concentration of the energy-saving additive in the water weekly and replenish it as needed based on losses from evaporation, wastewater discharge, etc., to maintain an effective concentration.

[0036] The energy efficiency testing methods and procedures are as follows: A heat exchange system with a relatively stable operating load was selected as the test object. A baseline test period was established before adding the energy-saving additive. During this baseline test period, key operating parameters were recorded hourly, including: hot-side medium: flow rate (F... h ), Inlet temperature (T) h,in ), outlet temperature (T) h,out Cold side medium: flow rate (F) c ), Inlet temperature (T) c,in ), outlet temperature (T) c,out System energy consumption: power consumption of the water pump (E). pump ).

[0037] Data collection during the testing period: After adding the energy-saving additive and mixing it evenly, the energy-saving testing period should begin immediately. The duration of the energy-saving testing period should be the same as the baseline period, and operating parameters should be recorded at the same frequency and for the same items. The external environmental conditions and system operating load during the baseline period and the testing period should be kept as consistent as possible.

[0038] Data processing and energy saving rate calculation: Calculate heat exchange rate: Based on the cold side water data, calculate the heat exchange rate Q per unit time. Calculation formula: Q=F c ×ρ×C p ×(T c,out -T c,in ).

[0039] ρ is the density of water, 1000 kg / m³. C p The specific heat capacity of water is 4.18 kJ / (kg·℃).

[0040] Total energy consumption of the computing system: Integrating the pump power over time yields the total power consumption E during the test period. total .

[0041] Calculate the energy efficiency ratio or heat flux ratio: Baseline period energy efficiency ratio: EER baseline =ΣQ baseline / ΣE total_baseline ; Energy Efficiency Ratio during Testing Period: EER test =ΣQ test / ΣE total_test ; ΣQ represents the total heat exchange during the entire test period, and ΣE_total represents the total energy consumption during the entire test period. Calculate the energy saving rate: Energy saving rate (%) = [(EER)] test -EER baseline ) / EER baseline ]×100% This formula calculates the improvement rate of system energy efficiency, which comprehensively reflects the net energy saving effect brought about by enhanced heat exchange and changes in water pump energy consumption.

[0042] Example 1: The energy-saving additive comprises the following components by weight: 20 parts polyoxyethylene monotridecylfluorooctyl ether, 30 parts polyethylene glycol 200, 20 parts polyacrylic acid, 20 parts phosphonobutane tricarboxylic acid, and 10 parts fatty alcohol polyoxyethylene propylene ether. The above five components are used to prepare the energy-saving additive product using the method for preparing energy-saving additives. Example 1 of the energy-saving additive was applied to a heat exchange system in a chemical plant. 0.01% by mass of the energy-saving additive was added to the water in the heat exchange system. With the original operating conditions of the heat exchange system unchanged, the average energy saving rate reached 18.63%.

[0043] Example 2: The energy-saving additive comprises the following components by weight: 3 parts polyoxyethylene monotridecylfluorooctyl ether, 31 parts polyethylene glycol 200, 31 parts polyacrylic acid, 31 parts phosphonobutane tricarboxylic acid, and 4 parts polypropylene glycol 200. The above five components are used to prepare the energy-saving additive product using the method for preparing energy-saving additives. Example 2 of the energy-saving additive was applied to a hotel heating system. 0.1% by mass of the energy-saving additive was added to the water in the heating system. With the original operating conditions of the heat exchange system unchanged, the average energy saving rate reached 12.92%.

[0044] Example 3: The energy-saving additive comprises the following components by weight: 3 parts polyoxyethylene monotridecylfluorooctyl ether, 22 parts polyethylene glycol 200, 32 parts polyacrylic acid, 12 parts phosphonobutane tricarboxylic acid, 12 parts sophorolipase, 16 parts polypropylene glycol 200, and 3 parts ethoxylated acetylene glycol. The above seven components are used to prepare the energy-saving additive product using the energy-saving additive preparation method. Example 3 of the energy-saving additive was applied to a residential community's HVAC system. 0.1% by mass of the energy-saving additive was added to the HVAC system water. With the original operating conditions of the heat exchange system unchanged, the average energy saving rate reached 6.78%.

[0045] Example 4: The energy-saving additive comprises the following components by weight: 5 parts polyoxyethylene monotridecylfluorooctyl ether, 23 parts polyethylene glycol 200, 33 parts polyacrylic acid, 23 parts phosphonobutane tricarboxylic acid, 3 parts sophorolipase, and 13 parts polypropylene glycol 200. The above six components are used to prepare the energy-saving additive product using the method for preparing energy-saving additives. Example 4 of the energy-saving additive was applied to an air conditioning system in a supermarket. 0.05% by mass of the energy-saving additive was added to the circulating water of the air conditioning system. With the original operating conditions of the heat exchange system unchanged, the average energy saving rate reached 6.78%.

[0046] Example 5: The energy-saving additive comprises the following components by weight: 3 parts polyoxyethylene monotridecylfluorooctyl ether, 32 parts polyethylene glycol 200, 32 parts polyacrylic acid, 11 parts sophorolipid, and 22 parts ethoxylated acetylene glycol. The above five components are used to prepare the energy-saving additive product using the method for preparing energy-saving additives. Example 5 of the energy-saving additive was applied to a heat exchange system in a factory. 0.05% by mass of the energy-saving additive was added to the water in the heat exchange system. With the original operating conditions of the heat exchange system unchanged, the average energy saving rate reached 3.39%.

[0047] Example 6: The energy-saving additive comprises the following components by weight: 4 parts polyoxyethylene monotridecylfluorooctyl ether, 21 parts polyethylene glycol 400, 31 parts polyacrylic acid, 21 parts phosphonobutane tricarboxylic acid, 10 parts cellulose disodium ester, 12 parts polypropylene glycol 400, and 1 part ethoxylated acetylene glycol. The above seven components are prepared into an energy-saving additive product using the method for preparing energy-saving additives. Example 6 of the energy-saving additive was applied to a regional heat exchange system. 0.05% by mass of the energy-saving additive was added to the water in the heat exchange system. With the original operating conditions of the heat exchange system unchanged, the average energy saving rate reached 3.19%.

[0048] Example 7: The energy-saving additive comprises the following components by weight: 3 parts polyoxyethylene monotridecylfluorooctyl ether, 22 parts polyethylene glycol 600, 32 parts sodium polyacrylate, 21 parts phosphonobutane tricarboxylic acid, 21 parts trehalose lipoprotein, and 1 part ethoxylated acetylene glycol. The above six components are used to prepare the energy-saving additive product using the method for preparing energy-saving additives. Example 7 of the energy-saving additive was applied to a heat exchange system in a chemical plant. 0.1% by mass of the energy-saving additive was added to the water in the heat exchange system. With the original operating conditions of the heat exchange system unchanged, the average energy saving rate reached 3.28%.

[0049] Example 8: The energy-saving additive comprises the following components by weight: 3 parts polyoxyethylene monotridecylfluorooctyl ether, 22 parts polyethylene glycol 200, 32 parts polyacrylic acid, 22 parts phosphonobutane tricarboxylic acid, and 21 parts ethoxylated acetylene glycol. The above five components are used to prepare the energy-saving additive product using the method for preparing energy-saving additives. Example 8 of the energy-saving additive was applied to a heat exchange system in a chemical plant. 0.05% by mass of the energy-saving additive was added to the water in the heat exchange system. With the original operating conditions of the heat exchange system unchanged, the average energy saving rate reached 4.32%.

[0050] Example 9: The energy-saving additive comprises the following components by weight: 22 parts polyoxyethylene monotridecylfluorooctyl ether, 22 parts polyethylene glycol 200, 22 parts sodium polyacrylate, 21 parts phosphonobutane tricarboxylic acid, 11 parts polypropylene glycol 200, and 2 parts ethoxylated acetylene glycol. The above six components are used to prepare the energy-saving additive product using the energy-saving additive preparation method. Example 9 of the energy-saving additive was applied to a heat exchange system in a chemical plant. 0.01% by mass of the energy-saving additive was added to the water in the heat exchange system. With the original operating conditions of the heat exchange system unchanged, the average energy saving rate reached 5.76%.

[0051] Example 10: The energy-saving additive comprises the following components by weight: 3 parts polyoxyethylene monotridecylfluorooctyl ether, 32 parts polyethylene glycol 200, 32 parts polyacrylic acid, 32 parts aminotrimethylphosphonic acid, and 1 part ethoxylated acetylene glycol. The above five components are used to prepare the energy-saving additive product using the method for preparing energy-saving additives. Example 10 of the energy-saving additive was applied to a heat exchange system in a chemical plant. 0.1% by mass of the energy-saving additive was added to the water in the heat exchange system. With the original operating conditions of the heat exchange system unchanged, the average energy saving rate reached 3.79%.

[0052] Example 11: The energy-saving additive comprises the following components by weight: 23 parts polyoxyethylene monotridecylfluorooctyl ether, 33 parts polyethylene glycol 200, 22 parts polyacrylic acid, and 22 parts hydroxyethylidene diphosphonic acid. The above four components are used to prepare the energy-saving additive product using the energy-saving additive preparation method. Example 11 of the energy-saving additive was applied to a heat exchange system in a chemical plant. 0.01% by mass of the energy-saving additive was added to the water in the heat exchange system. With the original operating conditions of the heat exchange system unchanged, the average energy saving rate reached 4.77%.

[0053] Example 12: The energy-saving additive comprises the following components by weight: 7 parts polyether-modified trisiloxane, 23 parts phosphonobutane tricarboxylic acid, 35 parts polyethylene glycol 200, and 35 parts dipropylene glycol methyl ether. The above four components are used to prepare the energy-saving additive product using the method for preparing energy-saving additives. Example 12 of the energy-saving additive was applied to a heat exchange system in a chemical plant. 0.01% by mass of the energy-saving additive was added to the water in the heat exchange system. With the original operating conditions of the heat exchange system unchanged, the average energy saving rate reached 9.54%.

[0054] The surface tension, energy-saving efficiency, pH value, paint surface contact angle, and foam height of the energy-saving additives in Examples 1-12 were tested, and the results are shown in the table below: Table 1 Surface tension and other properties of energy-saving additives Test results show that: Surface tension is the most direct indicator of an energy-saving additive's ability to reduce liquid film thermal resistance and improve heat transfer efficiency. Data shows a strong negative correlation between surface tension and energy efficiency, validating the basic principles of this invention. Example 1 exhibits the lowest surface tension and the highest energy efficiency, demonstrating the most outstanding performance. This proves the optimality of its formulation in minimizing water surface energy and promoting efficient spreading and wetting. Example 8, despite its extremely low surface tension, shows significantly lower energy efficiency than Example 1. This indicates that low surface tension alone is insufficient to guarantee a high energy saving rate; foam characteristics may have a serious negative impact, and foam accumulation can impair effective heat transfer. Examples 2 and 6 have similar surface tensions, but their energy efficiency differs by nearly 10%. This further confirms that high foam levels severely offset the theoretical gains from low surface tension. Example 2 achieves a good balance between surface tension and foam control. Examples 3, 4, 9, 10, 11, and 12 all have surface tensions above 35 mN / m, and their energy efficiency is generally low. This indicates that when the ability to reduce surface tension is insufficient, there is a significant bottleneck in energy saving.

[0055] Foam height is crucial in determining whether energy-saving additives can be safely and stably applied to circulating systems. Excessive foam can lead to serious problems such as cavitation and deteriorated heat transfer. Examples 1 and 12 have a foam height of 0 mm. This represents a significant technological breakthrough, achieving a perfect balance between high efficiency and ultra-low foam. Examples 2-4 have lower foam levels, which should dissipate naturally or be easily controlled within the system, without affecting long-term stable operation. Examples 5-11, especially Example 8, exhibit prominent foam problems. High foam levels introduce significant application risks; even with some surface tension reduction capabilities, the actual energy-saving effect is greatly reduced or rendered impractical.

[0056] The contact angle reflects the wetting and spreading ability of the energy-saving additive on the paint surface. The smaller the angle, the better the wetting, and the more conducive it is to forming a uniform thin liquid film. Examples 1, 6, 7, 8, 11, and 12 exhibit excellent spreading ability. It is worth noting that Example 11 has the lowest contact angle, but its high surface tension and high foaming lower its overall efficiency. Examples 2, 5, and 9 meet the basic requirements for wetting. Examples 3, 4, and 10 have insufficient wetting and spreading ability, which is one of the important reasons for their low energy-saving efficiency.

[0057] Next, the surface tension and pH value of the energy-saving additive in Example 1 were tested at different temperatures, and the results are shown in the table below: Table 2 Heating and Temperature Resistance Effects of Energy-Saving Additives This test simulated the high-temperature conditions that the energy-saving additive might experience in a heat exchange system. After maintaining the energy-saving additive solution from Example 1 at different temperature points for 24 hours, its pH value, surface tension, and performance degradation rate were measured. The results showed that when the test temperature was gradually increased from room temperature (25°C) to 140°C, the pH value remained neutral at all temperature points without significant change, demonstrating extremely strong chemical stability. Throughout the heating process, the pH value remained neutral and unchanged. This indicates that the formulation components of Example 1 did not undergo decomposition or reaction that would cause changes in acidity or alkalinity at high temperatures. This ensures that the energy-saving additive will not cause corrosion or scaling risks to the heat exchange system pipes and equipment due to pH drift during long-term high-temperature operation, thus ensuring the safety and long service life of the system.

[0058] As the processing temperature increased, the surface tension slowly rose from an initial 27.68 mN / m to 29.65 mN / m. Data shows that even after 24 hours of treatment at 140°C, its surface tension remained significantly lower than that of pure water, and the increase was controlled within a reasonable range. From 25°C to 140°C, the absolute increase in surface tension was only 1.97 mN / m, with a relative increase of approximately 7.1%. This slow trend demonstrates that the active components of Example 1, particularly the main surfactant, exhibit structural stability at high temperatures, effectively maintaining their surface activity and ensuring the longevity of the energy-saving effect over a wide temperature range.

[0059] Based on the initial surface tension increase, the performance degradation rate was calculated to gradually increase from 0.11% at 80℃ to 7.12% at 140℃. Within the typical heat exchange temperature range of 80-100℃, the degradation rate is extremely low, with almost no performance loss. Even under harsh conditions of 120℃ and 140℃, the degradation rate is only 3.76% and 7.12%, respectively. This demonstrates that this energy-saving additive is suitable for most industrial heat exchange systems operating at high temperatures, broadening its application scope.

[0060] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0061] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An energy-saving additive for heat exchange systems, characterized in that, The energy-saving additive comprises the following components in parts by weight. Main surfactant: 2-20 parts; Scale inhibitor: 0-30 parts; Coupling agent: 0-30 parts; Regulator: 0-40 parts; Surface tension control agent: 0-20 parts; Auxiliary surfactant: 0-10 parts; Dispersant: 20-30 parts; Defoamer: 0-10 parts.

2. The energy-saving additive for heat exchange systems according to claim 1, characterized in that: The main surfactant is fluorocarbon polyoxyethylene ether, and the component is 10-20 parts by weight; The scale inhibitor is an organophosphate compound, and the component is 20-25 parts by weight; The coupling agent is an alcohol ether, and the component is 5-10 parts by weight; The regulator is a polyol, and the component is 20-30 parts by weight; The dispersant is an acrylic compound, and the component is 20-25 parts by weight.

3. The energy-saving additive for heat exchange systems according to claim 1, characterized in that: The main surfactant is polyoxyethylene monotridecylfluorooctyl ether, and the surface tension control agent is ethoxylated acetylene glycol.

4. The energy-saving additive for heat exchange systems according to claim 1, characterized in that: The regulator is one or more of polyethylene glycol 200, polyethylene glycol 400, polyethylene glycol 600, polypropylene glycol 200, and polypropylene glycol 400, and the defoamer is one or more of heptamethyltrisiloxane, ethoxylated trisiloxane, and polyether-modified trisiloxane.

5. An energy-saving additive for heat exchange systems according to claim 1, characterized in that: The glycolipid is one or a combination of trehalose, cellobiose, and sophorolipid.

6. The energy-saving additive for heat exchange systems according to claim 1, characterized in that: The scale inhibitor is one or more of phosphonobutane tricarboxylic acid, hydroxyethylidene diphosphonic acid, and aminotrimethylphosphonic acid.

7. An energy-saving additive for heat exchange systems according to claim 1, characterized in that: The coupling agent is one or a combination of fatty alcohol polyoxyethylene ether, secondary alcohol polyoxyethylene ether, and fatty alcohol polyoxyethylene propylene ether, and the dispersant is one or a combination of two of polyacrylic acid and sodium polyacrylate.

8. The energy-saving additive for heat exchange systems according to claim 1, characterized in that: The main surfactant is polyoxyethylene monotridecylfluorooctyl ether, and the component is 20 parts by weight. The regulator is polyethylene glycol 200, and the component is 30 parts by weight; The dispersant is polyacrylic acid, and the component is 20 parts by weight; The scale inhibitor is phosphonobutane tricarboxylic acid, and the component is 20 parts by weight; The coupling agent is fatty alcohol polyoxyethylene propylene ether, and the component is 10 parts by weight.

9. A method for preparing an energy-saving additive for a heat exchange system, used to prepare an energy-saving additive for a heat exchange system as described in any one of claims 1-8, characterized in that: The method involves mixing several of the following: main surfactant, scale inhibitor, coupling agent, regulator, surface tension control agent, auxiliary surfactant, dispersant, and defoamer, and stirring evenly to obtain an energy-saving additive.

10. An application of an energy-saving additive for heat exchange systems, characterized in that: The energy-saving additive for heat exchange systems according to any one of claims 1-8 is applied to heat exchange systems using water as the heat exchange medium.

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