Latent Heats Research Articles

Reality versus simulation-implementation of heat exchangers with phase changes

The heat exchanger is probably second only to the pipe as the most widely used piece of process equipment. A typical chemical plant has hundreds of heat exchangers that transfer heat from a hot source into a cold sink. The analysis of heat transfer is straight-forward when both the hot and the cold streams do not undergo any change in phase during the heating and cooling. However, the analysis gets more complex when there is vaporization or condensation of either of the streams. Now latent heats are involved and temperatures do not change continuously with axial location. Vaporizers, reboilers, evaporators and condensers are common examples of heat transfer with phase changes.The purpose of this paper is to demonstrate how realistic simulation models can be developed that capture the steadystate and dynamic heat-transfer differential temperature driving forces, vapor-liquid fractions and heat-transfer rates for these important and widely applied exchangers.

Development and properties of n-octadecane / kaolinite composites as form-stabilized phase change materials for energy storage

Thermal energy storage (TES) is one of the promising options applied for obtaining energy-saving possibilities. This goal can be attained by using phase change materials (PCMs) that allow storing/releasing latent heats without losses caused by temperature differences. However, in most cases these materials need to be encapsulated for various applications, especially to prevent contamination and/or loss of substance. In this work, incorporation of a kind of an organic PCM belonging to the paraffins was performed by one step impregnation method. For this purpose, n-octadecane (n-OD) having 191.7 kJ/kg latent heat of melting and 34.2 οC peak melting temperature was used. In here, Kaolinite clay (KC), which was modified with cetyltrimethylammonium bromide in order to enhance the incorporation amount of n-OD, was utilized as the support matrices and called as m-KC. The development of form-stable composite PCMs was carried out by applying different recipes with varying the amounts of n-OD impregnation. Among the obtained composite PCMs, m-KC/OD30 having m-KC/n-OD: 70/30 composition ratio, demonstrated the highest TES capacity without any leakage during the usage. Accordingly, TES capacity and latent heat of melting peak temperature of m-KC/OD30 were found as 81.8 kJ/kg and Tpm = 30.4 °C, respectively. Based on the appropriate phase transition temperatures and favorable latent heat of melting value, the obtained form-stable composite PCMs can be implemented for the regulation of ambient temperatures in the low-medium temperature application fields, thus a cleaner process can be implemented by realizing energy savings.

Energy storage and milk chilling performance of metal oxide nanofluids

The commencement of the cold-chain from the milk production points in smallholder and unorganized dairying in developing nations is still an unmet need. In the present study, an attempt was made to develop nanofluid based phase change materials (n-PCMs), using Al2O3, CuO and TiO2 nanoparticles (at 0.00%, 0.50% and 1.00%) for efficient storage of thermal energy and its subsequent utilization in rapid chilling of milk. Thermal conductivity of the n-PCMs was enhanced up to 29.49% as compared to the base fluid (water) and exhibited the supercooling reduction by 53.74%. Slight reductions in the specific and latent heats were observed (maximum at 1.00% level of nanoparticles) in the range of 0.10–0.25 and 0.4–0.8 kJ/kg, respectively. The n-PCMs capsuled inside a spherical module exhibited energy storage and milk chilling rate augmentations up to 31.97% and 39.11%, respectively. Temperature mapping of n-PCMs along the central vertical points (viz., upper, middle and lower) inside the spherical capsule exhibited the distinct trends during the pre and post phase-transition regimes, which were primarily driven by the buoyancy and natural convections. The study demonstrated the feasibility of developing the energy efficient passive chillers for rapid chilling of milk under the field conditions.

Encapsulation of stearic-palmitic acid in alkali-activated coconut shell and corn cob biochar to optimize energy storage

Biochar has gained attention as a green and low-cost energy utilization resource. However, the application of biochar as a carrier for form-stable phase change materials (FSPCMs) has been limited by leakage and low encapsulation ratio. This study investigated the potential of alkali-activated biochar as a carrier for FSPCMs. Commercial coconut shell and corn cob biochar were activated with different ratios of NaOH, and the resulting materials were impregnated with a stearic-palmitic acid binary eutectic mixture to obtain FSPCMs. The activation process enriched the pore structure of the biochar without generating negatively impacting chemical compatibility. The maximum melting latent heats of NaOH-activated coconut shell and corn cob biochar were 80.15 J/g and 127.69 J/g, respectively, and the encapsulation efficiencies were 15.96 % and 23.77 % higher than that of the original biochar, respectively. Synthetic FSPCMs also showed improved thermal stability, leak resistance, moderate thermal conductivity, and excellent temperature regulation. The study demonstrates that the activation of biochar with an appropriate ratio of NaOH can be a promising approach for converting waste into an effective carrier of PCMs for various temperature regulation systems, contributing to energy conservation and environmental protection.

Selecting an optimum kinetic model for gas–solid adsorption based on statistical approaches and a model selection criterion

Adsorption heat transformation (AHT) techniques can help to safeguard the environment by reducing the use of fossil fuels. When constructing an adsorption-based dynamic heat pump system, analyzing the kinetic characteristics of the adsorbate–adsorbent pair is important. The recently established time-adapted linear driving force (LDF) and commonly used models such as LDF, modified LDF, and Fickian diffusion (FD) models are available in the literature for analyzing the kinetic characteristics, making it challenging for researchers to select the optimum one for simulating the complete real system. This study applies a non-parametric statistical approach known as bootstrapping for simulating the replica of experimental kinetics data for all studied pairs. The kinetics models mentioned above are used to correlate the bootstrap samples. The estimated values of the statistical parameters are compared, and the optimum kinetics model for gas–solid physical adsorption is proposed. The parameters of the model are estimated using the generalized reduced gradient (GRG) non-linear optimization method. For each bootstrap sample, the optimum model is selected based on the minimum values, which means less information loss, of a set of information-based model selection criteria (ICs). The time-adapted LDF incurs smaller values of IC compared to other kinetics models. The p-value of the proportion test for water adsorption onto AQSOA-Z01, RD silica gel, and Al-Fum is very small, which is less than 0.01. So, the test is significant at a 1% level, which implies that time adapted LDF model is significantly optimum. This is the first time that a rigorous statistical optimization technique has been used to identify the optimum kinetic model for gas–solid adsorption. The current findings are critical for a comprehensive analysis of an adsorption system and its design.

Impacts of the internal heat recovery scheme on the performance of an adsorption heat transformer cycle for temperature upgrade

Adsorption heat transformer (AHT) cycles, unlike adsorption cooling cycles, upgrade the heat source to a higher temperature. Despite the renewed interest in the AHT cycles, its performance enhancement schemes along with their impacts are yet to be explored extensively. Heat and mass recovery schemes on the adsorption cooling/heating cycles have been extensively studied. However, AHT cycles are fundamentally different from those cycles since the AHT cycles employ isothermal-adiabtic processes. Thus, similar impacts of the heat and mass recovery scheme as in the cooling/heating cycles cannot be expected in AHT cycles. Therefore, the impacts and limitations of the internal heat recovery scheme on the AHT cycle are investigated in the current study. The heat recovery scheme aims to minimize the requisite uptake consumption for preheating the adsorber bed by recovering the sensible heat between two adsorber beds having different temperatures. This sensible heat exchange is modeled using modified energy-balance equations to capture the non-linearity of the adsorption process. The preheating uptake loss decreases from 0.014 kg/kg to 0.007 kg/kg at the heat source-heat supply temperature combination of 60 °C–80 °C due to the maximum possible heat recovery in the AHT cycle. As a result of the reduced preheating uptake loss, approximately 5% and 10% increase in the useful heat ratio and exergy efficiency of the AHT cycle, respectively are obtained. This modified AHT cycle further improves the performance ratio of the hybrid AHT-MED (multi-effect distillation) system from 4.6 to 4.9 at the heat source temperature of 58 °C. Furthermore, a parametric analysis of the cycle's performance metrics has been conducted for various degrees of heat recovery, representing the effect of realistic heat exchanger effectiveness during the recovery process. This study will help propel the theoretical development of the adsorption-based thermodynamic systems.

Estimating the thermal conductivity of granular soils based on a simplified homogenization method

Thermal conductivity is a fundamental parameter for analyzing the thermodynamic behavior of granular soil as well as the workability of geothermal structures. Most of the previous work on modeling the thermal conductivity of granular soil is empirical, and the inter-granular structure is not considered. Therefore, a simple yet effective model is required for accurately capturing the heat transformation behavior of granular soils. To this end, a structure variable is introduced to describe the evolution of inter-granular structure of granular soils, which is found to decrease with the porosity but is rather independent of the nature of particles. Based on the insight drawn from the laboratory tests, a simple homogenization equation is formulated for correlating effective thermal conductivity of granular soil and that of soil particles. Finally, a novel thermal conductivity model is established by incorporating the structural variable into the simplified homogenization equation. Validation of the model is done by comparing the predicted results with the experimental data as well as the data compiled from literatures, indicating that our model can effectively capture the thermal conductivity of various granular soils with wide range of porosity.

New configurations of absorption heat transformer and refrigeration combined system for low-temperature cooling driven by low-grade heat

A significant proportion of industrial waste heat and renewable energy is low-grade with temperatures below 100 °C, which can hardly drive the conventional absorption refrigeration systems for producing cooling below 0 °C. To solve this problem, an absorption heat transformer, whose absorber is combined with the generator of the absorption refrigeration system, is introduced to increase the temperature of the low-grade heat source to drive the absorption refrigeration system. Temperature matching between the two sub-systems and between the heat source and the combined system determines the performance of the combined system. Hence, new configurations and continuous-temperature-changing processes are proposed and numerically studied. Results show that the system performance improves significantly when continuous-temperature-changing processes are introduced, and the utilization temperature span of heat source and the refrigeration capacity increase by 80 % and 108 %, respectively. Moreover, the continuous-temperature-changing absorption-generation process is investigated by dividing into 8 sections, and it is found that the process achieves optimal performance, when the absorption side only has adiabatic and absorption sections, and the generation side only has adiabatic and generation sections. Results indicate that the proposed system shows great potential to harvest low-grade heat at 80 °C, and produce refrigeration capacity below −15 °C.

Experimental and analytical investigation of applying an asymmetric plate heat exchanger as an evaporator in a thermally driven adsorption appliance

This communication presents an experimental and analytical study on the evaporation mechanism in a closed-structured asymmetric plate heat exchanger (PHE) employed as a stagnant water evaporator for the application in an adsorption heat transformation appliance. To this aim, an experimental unit is constructed, which comprises two identical PHEs, one acting as an evaporator/condenser and the second, as an adsorber/desorber. Two endoscopes are mounted inside the investigated evaporator to visualize the evaporation mechanism when performing adsorption-evaporation processes under different boundary conditions. It turned out that the evaporation mechanism is a partially covered, thin film evaporation. A heat transfer analysis is performed to evaluate the heat transfer coefficient of the thin film evaporation (hf) inside the investigated evaporator, resulting in hf-values between 1330 and 160 [W∙m−2∙K−1] over the investigated adsorption-evaporation time. Correlating the obtained (hf) to the film thickness δ and the wetted area Awet results in δ-values between 0.34 and 0.78 [mm] and wetted to total area ratios Awet/Atotal of 0.78 to 0.16. Besides, an analytical model has been developed and introduced to correlate the overall evaporator heat transfer coefficient with the adsorption potential and the time rate of change of the water uptake.

Encapsulating an inorganic phase change material within emulsion-templated polymers: Thermal energy storage and release

Phase change materials (PCMs) based on hydrated salts are promising candidates for energy storage and release applications owing to their relatively high latent heats per volume, their high thermal conductivities, and their nonflammability. The use of these PCMs, however, is limited owing to incongruent melting, significant supercooling during crystallization, and irreversible phase transformations. PolyHIPEs, polymers templated within high internal phase emulsions (HIPEs), were proven to be effective at encapsulating aqueous solutions and organic liquids. Here, calcium chloride hexahydrate (CCHH) was successfully encapsulated within elastomeric, acrylate-based, emulsion-templated polymers by using free-radical polymerization within molten-salt-in-oil HIPEs. The effects of adding a nucleating agent to the internal phase to reduce supercooling and the effects of enhancing HIPE stability through modification of the external phase were investigated. The crosslinking and stabilization modifications made to enhance the original polyHIPE formulation successfully enhanced the encapsulation efficiency. The most promising system, 75% CCHH dispersed as relatively uniform internal phase droplets of 100–300 μm in diameter, exhibited melting and crystallization heats of ⁓120 J/g, a relatively low degree of supercooling, and negligible transformation to calcium chloride tetrahydrate. This work, demonstrating that molten salt hydrates can be successfully encapsulated within elastomeric, emulsion-templated monoliths, can be used as a blueprint for the encapsulation of other salt hydrates.

Investigations on a bubble-pump-aided diffusion absorption heat transformer using deep eutectic solvent for harvesting and upgrading thermal energy

Absorption heat transformer shows promising potential in thermal energy harvesting and upgrading, while the corrosion and crystallization risks of existing working substance restrict its promotion. A bubble-pump-aided diffusion absorption heat transformer using deep eutectic solvent is proposed in this study. The influence of operating parameters of bubble pump is analyzed, indicating that motive head should be as large as possible while diffusion gas flow rate has the optimum. Because of worse pumping ability, deep eutectic solvent has narrower normal operating range compared with LiBr, but the optimal energy performance shows little difference. Ethaline exhibits the best performance among deep eutectic solvents. With heat source of 90 ℃, COP and ηEX of 0.401 and 48.9% can be reached to output thermal energy of 120 ℃, leading to a CO2 emission reduction of 20.1 Mt per year. Parametric analysis demonstrates that single-stage diffusion absorption heat transformer using ethaline can realize temperature lift up to 50 ℃, which delivers comparative performance against existing AHT systems, except for operating range. Approaches are discussed to enlarge its operating range and further improve its performance as well. The results in this paper contribute to: 1) providing a promising absorption heat transformer configuration for large-scale and long-term use; 2) quantitatively demonstrating the prospect of deep eutectic solvent; 3) enlightening insights in the recovery of industrial waste heat, the upgrading of thermal energy and the reduction of CO2 emission.

Heat transfer of generalized second grade fluid with MHD, radiation and exponential heating using Caputo–Fabrizio fractional derivatives approach

The aim of the present work is to apply the Caputo–Fabrizio fractional derivative to the heat transformation of unsteady incompressible second grade fluid. The effects of magneto hydro dynamic and radiation are analyzed. In governing equation of heat transfer nonlinear radiative heat is examined. Exponential heating phenomena is considered at boundary. Firstly, the dimensional governing equations with the initial & boundary conditions are converted into non-dimensional form. Exact analytical solutions are obtained for dimensionless fractional governing equations which consist of momentum and energy equations by using Laplace transform method. Special cases are investigated of the obtained solutions and it is noticed that some well-known results are achieved published in literature from these special cases. At the end, for graphical illustration the influences of different physical parameters like radiation, Prandtl, fractional parameter, Grashof numbers and Magneto hydro dynamic are checked graphically.

A comprehensive evaluation on the cycling stability of sugar alcohols for medium-temperature latent heat storage

Sugar alcohols have been proposed as a class of potential phase change materials (PCMs) for medium-temperature latent heat storage. The present work investigated the cycling stability of four pure and three mixture sugar alcohols by a specially-designed test setup, followed by a comprehensive evaluation based on their phase change behaviors (reported in our previous publication) and stability. It was found that the latent heats of fusion/crystallization degrade upon consecutive melting-crystallization cycles, and a higher degree of superheat ΔTsh leads to a faster degradation. An extremely low level of only 10.5 % degradation was obtained for erythritol after 200 cycles at a relatively low ΔTsh of 20 °C. The corresponding degrees of supercooling ΔTsc become higher due to the remarkable reduction of crystallization temperatures. It was shown that introducing protective nitrogen gas could suppress oxidation and improve cycling stability. The cycles of half degradation on latent heat of fusion was ~3.6 times with nitrogen protection. A comprehensive evaluation identified that the crystallization-related issues and poor stability are the primary challenges for sugar alcohols. Nevertheless, other than common PCMs, some particular application scenarios like controllable latent heat retrieval and seasonal heat storage can be hopefully developed by virtue of the deep supercooling nature of sugar alcohols.

Thermophysical Characterization of Paraffins versus Temperature for Thermal Energy Storage

Latent heat storage systems (LHSS), using solid–liquid phase change materials (PCMs), are attracting growing interest in many applications. The determination of the thermophysical properties of PCMs is crucial for selecting the appropriate material for an LHSS and for predicting the thermal behavior of the PCM. In this context, the thermophysical characterization of four paraffins (RT21, RT27, RT35HC, RT50) at different temperatures, including the solid and liquid phases, is conducted in this investigation. This work is part of a strategic technological brick in the CERTES laboratory of the Paris Est University to build a database for phase change material properties. It contains the measurements of the thermophysical, optical and mechanical properties. It will serve as input for the numerical simulations to study the behavior of PCMs in LHSS. The temperatures and the latent heats of the phase transitions as well as the thermal dependence of the specific heat of the paraffins were evaluated by differential scanning calorimetry (DSC). In addition, the DSC measurements under successive thermal cycles revealed good reliability of the paraffins. Thermogravimetric analysis (TGA) was performed, and the results highlighted the thermal stability of the paraffins. Moreover, the evolutions of the thermal conductivities and diffusivities with temperature were measured simultaneously using the hot disk method. A discontinuity of the thermal conductivities was observed near the melting temperatures. Furthermore, the measurements of the densities of the paraffins at different temperatures were carried out. The volume changes and the coefficients of thermal expansion were assessed. The obtained outcomes of this study were compared with the available bibliographical data.

Analysis on hybrid compression-assisted sorption heat transformer for potential domestic heating

ABSTRACT Space heating and hot water supply usually have great energy consumption in terms of household, industry, and other services which could be a big issue especially for the cold region. From technical and economic aspect, the present work investigates a hybrid sorption heat transformer (HSHT), which also plays a role of energy storage and upgrade. A renewable source or off-grid electricity is used for electricity supply while solar heat or ambient heat is regarded as heat inputs for two different scenarios. Composite ammonium chloride is used for further analysis of HSHT. Results indicate that HSHT could be a good candidate for the domestic heating in the cold region. Compared with vapor compression heat pump (VCHP), payback period (PBP) of HSHT could be reduced by up to 40%. Under different scenarios, PBPs are in the range from 2.48 year to 4.1 year. Also the levelized costs of heating of HSHT ranges from 20 $·MWh−1 to 46 $·MWh−1 for scenario 1 while the values of 64–133 $·MWh−1 could be obtained for scenario 2 which is up to 35.6% lower than that of VCHP. Carbon emission of HSHT system only accounts for 18% and 11% of that of gas boiler and VCHP, respectively.

A novel bio-based phase change material of methyl palmitate and decanoic acid eutectic mixture: Thermodynamic modeling and thermal performance

One of the most sustainable methods of energy management is thermal energy storage using renewable phase change materials. Phase change materials (PCMs) with high latent heat can store thermal energy when available and release it effectively when required. In this study, the thermal properties of a set of binary mixtures of methyl palmitate (MP) and decanoic acid (DA) have been evaluated as a new bio-based and renewable PCM. Both phase change materials are obtained from vegetable oil and are biomass-based materials. The results show that the binary eutectic mixture consisting of 30% MP and 70% DA has the desired properties as a PCM for applying as thermal energy storage in the building materials. These features include the convenient melting and freezing temperatures (Tm = 20.19 °C, Tf = 15.08 °C) and the high value of corresponding latent heats (ΔHf =202.3 J.g−1, ΔHm = 201.43 J.g−1). Evaluating other thermo-physical properties of this mixture also confirms its fitness for the PCM role. The composition and melting point of the eutectic point and the solid-liquid phase equilibrium for these mixtures were predicted by several thermodynamic models from which UNIQUAC showed the lowest Average Relative Deviation percentage (ARD%) of 0.29%.

Examination of eutectic phase change materials composed of diols and ionic liquids

This paper presents solid–liquid phase equilibrium studies of binary systems composed of pyridinium chloride monohydrates: hexadecylpyridinium chloride monohydrate, [PyC16][Cl] or dodecylpyridinium chloride monohydrate, [PyC12][Cl] with diols: 1,2-hexanediol, 1,6-hexanediol, 1,8-octanediol, 1,10-decanediol and 1,12-dodecanediol. These systems were selected to obtain eutectic mixtures with a high melting enthalpy and lower volatility (thus flammability) than pure diols. Ten eutectic Phase Change Materials (ePCMs) with melting points ranging from 265 K to 333 K (-8 °C to 60 °C) and enthalpies of melting from 125.9 to 212.8 J·g−1 were obtained. Experimental data were then correlated with the Non-Random Two-Liquid (NRTL) equation, and mixtures of eutectic composition were subjected to physicochemical characterisation. Using DSC, the latent heats of pure components and eutectic mixtures were determined, as well as the viscosity and the thermal conductivity of ePCMs was measured as a function of temperature. The final objective of the study was to increase the thermal conductivity of ePCMs by adding carbon nanotubes or expanded graphite, and to characterise the performance of such composite systems. The stability of nanofluids containing no less than 1 wt% SWCNTs and from about 10 wt% EG was confirmed under both isothermal and energy storage operating conditions, i.e. during a series of at least 1000 phase transformations. The addition of an inexpensive EG at 10 wt% increases the thermal conductivity by up to 200 % and reduces the probability of ePCM leakage as the material retains its shape even after melting.

First experimental characterization of CaCl2 coated heat exchanger for thermochemical heat transformer applications in industrial waste heat recovery

This study aims at evaluating the performance of a heat exchanger coated with CaCl2 (PVA polyvinyl alcohol used as binder) for Thermochemical Heat Transformers (THT) applications in industrial waste heat recovery.For this purpose, an experimental test bench has been built allowing to test operating temperatures up to 160 °C. A model heat exchanger plate is used to test two configurations: a thick layer of CaCl2 to model a packed bed reactor (used as reference) and a CaCl2-PVA deposit to model a coated reactor.For the packed bed configuration, results comparable to that of the literature are obtained with a specific power of 180 W/kg obtained for a temperature lift of 60 K. A high sensitivity to temperature lift is identified with a decrease of the specific power down to 38 W/kg for a lift of 77 K. The coated heat exchanger configuration achieves significantly higher performance with a specific power up to 341 W/kg for a temperature lift of 63 K. However, the analysis of the repeatability tests highlights a rapid change in temperature profiles highlighting a change in properties of the CaCl2/PVA compound material. Next steps will consist in enhanced material formulation and change in deposit protocol and to move to work at small reactor scale to assess system performance.

Develop a New Correlation between Thermal Radiation and Heat Source in Dual-Tube Heat Exchanger with a Twist Ratio Insert and Dimple Configurations: An Experimental Study

The goal of this research is to convey an outlook of heat transfer and friction factor in an exper-imental study with a double-pipe heat exchanger (DPHE). In process heat transformation (HT) and friction factor(f) in a DPHE counter-flow with a twisted tape (TT) arrangement by dimple inserts. The grooves were a kind of concavity that enhanced thermal transfer while only slightly degrading pressure. Heat transmission (HT) and friction factor(f) were investigated employing dimples with twisting tape of varying diameters along with uniform diameter (D) to the diameter-to-depth ratio (D/H). The impact of using twisted tape with various dimpled diameters D = 2, 4, and 6 mm at a uniform (D/H) = 1.5, 3 and 4.5 on heat transmission and friction factor properties were discussed. The dimple diameter (D) was directly connected to the friction coefficient (f), hence the highest value of friction factor was established at (D) = 6 mm. Furthermore, the best performance of Nusselt number (Nu) and performance evaluation criteria (PEC) was determined at a diameter of 4 mm. As a result, dimpled twisted tape additions are an excellent and cost-effective approach to improve heat transformation in heat exchangers. With fluid as a water, lower parameters, and higher Reynolds number (Re) resulted in better thermal conditions. Thermal performance and friction factor(f) correlations were developed with regard to the ge-ometry of the dimple diameter (D), its ratio (D/H), ‘Re’, and a good correspondence with the experimental data was achieved. The novel geometry caused a smaller pressure drop despite its higher convection heat transfer coefficient. The results also showed that raising the ‘Re’ and nanofluid concentration, the pressure drop increased.

Adsorption dynamics and hydrothermal stability of MOFs aluminium fumarate, MIL-160 (Al), and CAU-10-H, and zeotype TiAPSO for heat transformation applications

Metal-organic frameworks (MOFs) can be beneficial for heat transformation applications due to their potentially high water uptake and tunable working temperature levels. Although the hydrothermal stability has been assessed in some cases in terms of maximum water uptake and structural changes, there is no data on the impact of hydrothermal stress tests on adsorption dynamics. However, to maintain the designed heating or cooling power in the application, the hydrothermal stability in terms of both water uptake and adsorption dynamics is decisive. To close this gap, we present experimental data for the comprehensive evaluation of hydrothermal stability for three different MOFs and the commercially available zeotype TiAPSO. The hydrothermal stress test includes around 70,000 temperature swing cycles on aluminium sheets with a binder-based coating of different adsorbents. As a novelty of this study, adsorption dynamics are determined before and after the hydrothermal stress test using effective thermal resistances and the characteristic temperature difference. Our results show degradation in terms of a decrease in uptake around 5–10% after hydrothermal stress test for all samples. Under temperature boundary conditions relevant for the application, MIL-160(Al) shows even a drastic uptake reduction of around 35–45%. Except for CAU-10-H, none of the adsorbents show a degradation in terms of increased heat and mass transfer resistance. In case of CAU-10-H, the overall effective heat and mass transfer resistance increases by around 30–40% after the hydrothermal stress test. These results indicate that the hydrothermal stability of MOFs must be assessed in terms of both, uptake and adsorption dynamics, to ensure stable long-term performance in real-world devices.