Optimal Thermal Conditions Research Articles

The Influence of Temperature on the Antioxidants of Aronia mitschurinii Fruit Juice and Drinks.

Aronia mitschurinii is a cultivated species originating from crossbreeding the wild species Aronia melanocarpa, also known as the black chokeberry, and European mountain ash Sorbus aucuparia. The aronia fruit is dark purple, which can be attributed to the high content of anthocyanins, other flavonoids, and polyphenols. Aronia's reputation as a superberry entices small farms to use it as a prospective specialty crop. The fruit's high antioxidant content is a likely ingredient in several new products, such as jellies, jams, vitamin supplements, and beverages. Food applications of any fruit require high-temperature pasteurization as a major step in fruit processing. Many also require cooking. However, there are some major effects higher temperatures may have on antioxidants, such as isomerization and decomposition, both of which result in a loss of bioavailability of these key compounds. Here, we present a detailed investigation of the effect of temperature and time on the antioxidant content of Aronia mitschurinii juice and power aid drink. UV/vis methods were used to determine the total concentrations of anthocyanins, flavonoids, polyphenols, and tannins and to determine the optimal pasteurization and/or thermal processing conditions that would prevent significant loss in the antioxidant content in aronia products.

Research on assessing and enhancing indoor thermal and air conditions within typical elementary school classrooms in southern China

The thermal design of buildings in hot summer and cold winter regions must meet the requirements of thermal insulation in summer and heat preservation in winter. As a vital component of national compulsory education, primary schools must create a good indoor thermal environment for classrooms, which is particularly important for students. Due to the lack of construction standards and limited research on Chinese regions with hot summers and cold winters, policymakers have no comprehensive and efficient approach to creating optimal indoor thermal conditions in primary school classrooms. Therefore, based on the climate conditions of hot summer and cold winter areas, this study conducted field surveys in primary and secondary schools in hot summer and cold winter areas, summarized and analyzed the current situation of the surveyed classrooms and users' subjective evaluation of the indoor thermal environment of classrooms, and summarized the current hot summer and cold winter conditions. Problems in classrooms in primary and secondary schools in the region are clarified, and the research direction of construction strategies is clarified. The study found that most of the school hours in summer and winter were in a poor indoor thermal environment without refrigeration equipment. This study adjusted the school leaving time to 17:20 in summer and 17:00 in winter by adjusting the school leaving time to reduce the time of adverse thermal environment.

Determining the thermal comfort of naturally ventilated state colleges located in Madhya Pradesh, India

ABSTRACT Through the establishment of optimal thermal conditions, educational institutions can develop an environment favourable to learning, concentration, and academic achievements. Additionally, comfortable temperatures can contribute to the overall well-being and satisfaction of both students and teachers, fostering a positive educational experience. In this study, we aimed to determine the impacts of environmental factors on students’ thermal comfort in three state colleges of Madhya Pradesh. A total of 784 students participated in a questionnaire study conducted during May (Summer season), August (Monsoon season), October (Autumn season), and December (Winter season) of 2023 to assess occupants’ degree of clothing, temperature preference, and metabolic rates. Indoor and outdoor temperatures, relative humidity, and air velocity were measured using an anemometer. Throughout the study period, the thermal comfort range was determined to be between 21.5°C and 28.5°C, with 25°C as the neutral temperature. It has been noted that the clothing pattern varies during the year (0.47-0.85 Clo). Additionally, implementation of the adaptation strategies, such as switching on and off fans or opening windows, helped lessen discomfort in the classroom. The findings indicate that, in contrast to the other seasons, the summers brought exceptionally high levels of heat discomfort to the occupants.

THERMAL ADAPTIVE ARCHITECTURE: INTERPLAY BETWEEN ARCHITECTURE AND CLIMATE

The concept of architecture as a form of shelter, integral to both classical and contemporary discourse emphasizes the interplay between building structures and their climatic contexts. Vitruvius early observations underscore the importance of understanding how buildings act as barriers and responsive filters to their environments thereby shaping human activities. This paper explores the multi-faceted roles of buildings-functional, social, symbolic, artistic and their interconnections with thermal performance. While the adaptability of buildings to thermal conditions is well recognized, the impact of fluctuating economic factors such as energy prices, and the unpredictability of space usage add layers of complexity to thermal performance assessments. The research highlights the gap between theoretical knowledge and practical application in achieving optimal thermal conditions. By examining the integration of precise thermal techniques into building design this study aims to bridge these gaps and propose strategies for designing climate-sensitive architecture. The focus is on achieving comfortable and healthy living environments while ensuring cost-effective resource use. This approach advocates for a refined understanding of thermal response and its application in the design-build-occupy process ultimately contributing to more efficient and adaptive building practices.

Passive Ventilation of Residential Buildings Using the Trombe Wall

The article explores passive systems for regulating microclimates in residential settings, with a focus on modular constructions. It investigates the use of the trombe wall system for passive ventilation to ensure comfort and hygiene. The study examines building designs that enable effective air circulation without using mechanical systems. Furthermore, the effectiveness of the passive system of using solar energy with the trombe wall as a ventilation device in modular houses has been experimentally confirmed. Although the research confirms the effectiveness of this solar system in modular homes, there is limited documentation regarding its overall efficiency, particularly concerning the impact of the surface pressure coefficient on ventilation. The study establishes the correlations governing the thermosiphon collector’s effectiveness at varying air layer thicknesses. Optimal parameters, such as maximum air consumption (L = 120 m3h−1), are identified at an air layer thickness (δ) of 100 mm and outlet openings area (F) of 0.056 m2. These findings pave the way for improving passive systems aimed at maintaining optimal thermal and air conditions in modern homes. The findings suggest the potential for more efficient and sustainable housing solutions. Further research is essential to understand how factors like building design and wind speed affect ventilation system efficacy.

Temperature Dynamics in Early Pregnancy: Implications for Improving In Vitro Fertilization Outcomes

In assisted reproductive technology, in vitro fertilization involves cultivating embryos in an artificial environment, often yielding lower-quality embryos compared to in vivo conditions. This study investigated core body temperature (CBT) fluctuations in mice during early pregnancy. Their CBT was measured with a high temporal resolution to identify the optimal thermal conditions during the first five days post-fertilization, aiming to improve in vitro culture conditions. Data were collected from 12 female mice, with 8 becoming pregnant, using temperature loggers every minute for 11 days. Data analysis focused on trends, circadian rhythms, frequency components, and complexity using multiscale entropy (MSE). The results for the pregnant mice showed a mean CBT increase from 37.23 °C to 37.56 °C post-mating, primarily during the light phase, with a significant average rise of 0.58 °C. A Fourier analysis identified dominant 24, 12, 8, and 6 h components, with the 24 h component decreasing by 57%. Irregular fluctuations decreased, and MSE indicated increased complexity in the CBT time series post-mating. These results suggest that reducing diurnal temperature variations and maintaining a slightly elevated mean CBT of approximately 37.5 °C, with controlled minor fluctuations, may enhance embryo quality in pregnant mice. This study provides a reference for temperature regulation in embryo culture, improving embryo quality by aligning in vitro conditions with the natural thermal environment of the fallopian tubes.

Effects of B- and A/B-sites Codoping on lattice distortion and defect concentration for high electromechanical response of lead-free piezoelectrics

Effects of different thermal conditions on lead-free (Bi0.65Ba0.35)(Fe0.65Ti0.35)O3 ceramics were studied to reduce secondary phase formation, regulate bismuth vacancies and resulting oxygen vacancies, and Fe ions valence transition during the heat treatment process. The optimal thermal conditions led to a higher d33 = 200 pC/N and a d33* = 420 pm/V. A/B-sites ions replacement in BF35BT, BF35BT-Zr, and BF35BTSZ ceramics were prepared to reveal the effects of different Zr or Sr-Zr-contents. A maximum tetragonality (cT/aT) was estimated for the single doping (Zr) and co-doping (Sr and Zr) cases. For Zr = 0.02, the electric field-induced strain reached its maximum value of d33* = 562 pm/V. Similarly, a strain of d33* = 701 pm/V was observed for Sr-Zr = 0.02. Additionally, the d33* improved to 870 pm/V (90 °C) in Zr = 0.02 and 1130 pm/V (120 °C) in Sr-Zr=0.02. The presence of local structural heterogeneity causes the domain size to decrease as it moves from the micro to the nanoscale. The results demonstrate that improved performance can be associated with reduced concentration of oxygen vacancies, nanodomains by local structural heterogeneity, high lattice anisotropy, higher relative density, and appropriate grain size.

CeO2/ZrO2 p-n heterojunction nanostructures for efficient NO2 gas sensing

In a recent while, heterostructured nanomaterials have shown great potential for highly sensitive and selective gas sensing applications. Herein, CeO2–ZrO2 nanocomposites were fabricated in varying compositions in lower CeO2 region (2.5–10 %) via hydrothermal methodology. UV–visible DRS studies ascertained the band gap tailoring of the heterojunctions ranging from 3.33 to 4.07 eV as compared to their pure counter parts CeO2 (3.03 eV) and ZrO2 (4.96 eV). The surface area studies revealed the high specific surface areas of 90, 81.2, 72.7 and 61 m2/g for the 2.5, 5, 7.5 and 10 % CeO2–ZrO2 hetero-nanocomposites along with 53.2 and 108 m2/g for pure CeO2 and ZrO2 nanostructures, respectively. CeO2–ZrO2 nanocomposites revealed ameliorated sensing response towards the NO2 as compared to the bare ZrO2. The maximum sensitivity of 1572 was shown by the 5 % CeO2–ZrO2 nanocomposite at optimum operating thermal conditions of 250 °C that was relatively higher as compared to pristine ZrO2 nanospheres. Augmented sensing efficiency is attributed to the tweaked surface area of the nanocomposites, alleviated band energy, existence of oxygen vacant sites over CeO2 surface and ameliorated interaction due to the formation of CeO2–ZrO2 heterojunctions. The improved sensing performance of CeO2–ZrO2 sensors has been extensively discussed alongside mechanistic sketch.

Experimental study on improving the thermal performance of isobutane refrigeration system by parameter optimization

Improvement of thermal efficiency for isobutane refrigeration system could match well with the building requirements of low-carbon, and sustainable development. The electric radiant heater (ERH) is widely used for the freeze and cold storage (FCS) system, but it has problems of high electric consumption and high freezer compartment temperature rise (FCTR) as a result of low heat-transfer efficiency under defrosting. Therefore, a novel FCS system with an additional electric radiant heater (AERH) based on the heat required for frost melted and synchronous defrosting is proposed. The defrosting consumption and the FCTR of the novel FCS system are comprehensively evaluated by a novel evaluation method. Besides, the effect of the thermal parameters (i.e., the defrosting pause temperature, the position, and electric power of the AERH) on the heat transfer characteristics are compared and optimized by the experimental method. Finally, a novel method is presented to predict the optimum thermal conditions. The results show that the optimum system thermal performance is obtained, the defrosting duration and defrosting consumption are reduced by 44.02 % and 37.03 %, and the defrosting efficiency and energy efficiency could be increased by 17.92 % and 9.96 %, respectively, as compared to the conventional FCS system. The proposed FCS system has better economic performance and heat transfer efficiency. Meanwhile, 30.54 kg of CO2 emissions could be avoided during the annual operation period, and the environmental benefits are also considerable. This study not only reaffirms the benefit of using the AERH for defrosting in the FCS system but also provides a reference for the promotion and application of efficient heat transfer technology in building refrigeration engineering.

Thermal Comfort In Recreational Facilities: Examining the Effect of Misting Systems

This paper delves into the significance of misting systems in enhancing thermal comfort in indoor and outdoor environments, particularly in recreational facilities. It explores how misting systems regulate temperature and humidity to create optimal thermal conditions for users. The evolution of misting-cooling systems as integrated design solutions for outdoor spaces is also discussed, highlighting their benefits in achieving and maintaining thermal comfort. Thermal comfort plays a crucial role in the overall experience of individuals in recreational facilities. Misting systems have emerged as effective tools for regulating temperature and humidity levels, thereby enhancing the comfort of users. These systems have evolved over time to become integral components of indoor and outdoor design, offering a range of benefits in creating ideal thermal conditions. Misting systems operate by releasing fine water droplets into the air, which evaporate quickly, absorbing heat and lowering the surrounding temperature. This process helps to cool the environment and maintain optimal humidity levels, contributing to a more comfortable experience for individuals in recreational spaces. The use of misting systems in recreational facilities offers several advantages, including improved thermal comfort, energy efficiency, and enhanced user experience. By creating a pleasant microclimate, these systems contribute to increased satisfaction among visitors and can help attract more patrons to the facility. Misting-cooling systems have undergone significant advancements in recent years, with a focus on integrating them seamlessly into outdoor spaces. By considering factors such as site topography, vegetation, and daily shade patterns, designers can optimize the effectiveness of misting systems in controlling microclimatic conditions. Keywords: Thermal Comfort, Recreational Facilities, Misting Systems, Droplets, Vegetation

Human thermal comfort in kitchen with different ventilation modes based on a coupled CFD and thermoregulation model

Kitchen ventilation is crucial in effective removal of pollutants and heat in the enclosed kitchens to ensure occupants' thermal comfort and health. However, mechanical ventilation systems, such as range hoods and make-up air systems, often create non-uniform and dynamic thermal conditions, posing challenges for traditional comfort metrics. In response, this study utilizes Computational Fluid Dynamics (CFD) coupled with a human thermoregulation model to evaluate the thermal comfort across various kitchen ventilation modes. Our findings reveal significant non-uniformity in indoor thermal environments surrounding the occupant, with differences in ambient temperature reaching 14.2 °C and air velocity up to 0.64 m/s, directly impacting occupants' comfort. Notably, mechanical ventilation employing air curtains for make-up air surpasses natural methods, enhancing overall thermal sensation by 42 % and reducing mean drought rates by 70 % during winter. Additionally, ceiling supply systems improve upper body comfort in summer, offering personalized thermal comfort solutions, and achieves optimal thermal comfort conditions at a make-up air temperature of 25 °C. This research contributes valuable insights into selecting appropriate ventilation strategies for residential kitchens, thereby promoting occupants' well-being and health.

Experimental Measurements in Schools with Natural Ventilation

Abstract Facilities for children and young people should be established in a healthy environment that is protected from external health-damaging factors, such as noise, air pollution, and negative educational influences. A school building should also be a safe and healthy environment for pupils and students, as legally required. However, although some school buildings have been renovated, most were constructed in the last century, and their indoor microclimate remains unsatisfactory. Schools must maintain optimal thermal and humidity conditions to ensure the healthy development of children and their ability to function properly in a classroom. While natural ventilation through opening windows is a good practice, it may not always guarantee sufficient air exchange, especially for schools located in busy traffic areas. This paper presents experimental measurements and a comparison between two primary schools in Bratislava, which describes the current thermal and humidity conditions in the indoor environment of both schools. Experimental measurements were carried out on five school days in each primary school to determine the thermal-humidity conditions and indoor air quality, depending on the concentrations of carbon dioxide.

Numerical simulation of hot soak in cabin based on ventilation strategy

To address the issue of excessive heat within the vehicle’s cabin, this study employs transient simulation methods to explore and analyze how various ventilation tactics and parameters influence the cabin’s temperature distribution and air quality. Findings indicate that the optimal thermal comfort and air quality conditions are achieved through the implementation of a top ventilation strategy. Specifically, with an air supply velocity of 3 m/s, a supply air temperature of 19°C, and an airflow direction of 15°, the air age at the driver’s breathing zone is measured at 18.92 seconds, while it stands at 20.35 seconds at the child passenger’s breathing zone. This ventilation setup achieves an air exchange efficiency of up to 80.1%, nearly complete pollutant removal efficiency, and places the thermal comfort at monitored human body points within a range deemed satisfactory or comfortable. Overall, this configuration yields the most favorable conditions for the comfort of the driver and passengers compared to other scenarios examined.

The effect of liquid channels and cold plates on the performance of hybrid thermal management strategies for cylindrical Li-ion cells

In this paper, phase change material (PCM) based hybrid thermal management strategies are proposed for cylindrical Lithium-ion battery modules. Experimental and numerical studies are conducted to analyze the proposed strategies at a high discharge rate of 7 C. Three different types of thermal management configurations are developed. In all the configurations primary coolant is the PCM and secondary coolants are liquid and air. In one of the configuration vertical liquid coolant channels are placed between the PCM and airflow at the top of the cells. Whereas, in the two configurations different designs of cold plates are utilized in place of liquid channels. The experimental studies are conducted to obtain the temperature and heat flux profiles of the battery module. Moreover, a numerical model is developed and validated using the experimental data obtained. Using the numerical model, the thermal performance of the battery module was obtained for the proposed strategies. Based on the results, the maximum temperature of the battery module was limited to 29.1 °C and a high temperature uniformity was achieved by the end of the discharge cycle with the temperature difference limited to 1.2 °C. Additionally, the proposed hybrid thermal management strategy was capable of maintaining the required optimal thermal operating conditions without changing the phase of the PCM. Furthermore, it eliminates the requirement of a pump and reservoir since there is no flow of liquid within the battery module. This reduces the energy required for the operation of the thermal management system, thereby increasing the available energy for propulsion. Additionally, the developed strategy also increases the safety of the battery modules as it is capable of maintaining the required thermal environment in high discharge rates up to 7 C.

Decoding the Role of the Global Proteome Dynamics for Cellular Thermal Stability.

Molecular mechanisms underlying the thermal response of cells remain elusive. On the basis of the recent result that the short-time diffusive dynamics of the Escherichia coli proteome is an excellent indicator of temperature-dependent bacterial metabolism and death, we used neutron scattering (NS) spectroscopy and molecular dynamics (MD) simulations to investigate the sub-nanosecond proteome mobility in psychro-, meso-, and hyperthermophilic bacteria over a wide temperature range. The magnitude of thermal fluctuations, measured by atomic mean square displacements, is similar among all studied bacteria at their respective thermal cell death. Global roto-translational motions turn out to be the main factor distinguishing the bacterial dynamical properties. We ascribe this behavior to the difference in the average proteome net charge, which becomes less negative for increasing bacterial thermal stability. We propose that the chemical-physical properties of the cytoplasm and the global dynamics of the resulting proteome are fine-tuned by evolution to uphold optimal thermal stability conditions.

Fast Estimation of Entropy Profiles for Lithium-Ion Batteries

The operating temperature of a lithium-ion battery (LIB) has strong effects on its electrochemical performance, safety, and lifetime. Reliable predictions of cell temperature and heat generation are required for the design and thermal management of battery systems. During the normal operation of LIBs, heat sources can be classified into irreversible heat from resistive losses such as ohmic resistance, charge-transfer overpotentials, and mass-transfer limitations; and reversible heat from entropy change . The irreversible heat generation is related to the cell's internal resistance and the applied current. The reversible heat depends on the entropy variation of electrode materials, the state of charge (SoC), and the temperature. An accurate measurement of entropy-variation will not only help to improve the battery operation under optimal thermal conditions but can also be used to diagnose the battery aging since it can reveal crystal structure changes in the electrodes [1, 2].Techniques for measuring the entropy of a battery can mainly be classified into potentiometric [3] and calorimetric methods. The potentiometric method measures the open circuit voltage (OCV) changes while the cell temperature is varied at different SoCs. This method requires a long relaxation time to obtain the OCV equilibrium state following each SoC point and temperature step. The calorimetric method [4-6] is based on measuring the heat generation during charge and discharge, and various models are applied to differentiate between and quantify the reversible and irreversible heat sources. The entropy variation with SOC is obtained via the reversible heat rate.Recent improved methods include e.g., Schmidt et al. [4] who proposed a reversible heat extraction method based on electrothermal impedance spectroscopy (ETIS) and Damay et al. [5] proposing a fast calorimetric method to obtain a continuous entropy profile. The cell surface temperature is monitored while the battery is charged and discharged continuously. A thermal balance is used to estimate the heat generation from the monitored cell temperature changes during charge and discharge. The benefit of this method can be low cost, fast and high resolution. Bedürftig et al. [6] proposed a calorimetric method named ‘Double Pulse Method’ to measure reversible heat in lithium-ion battery cells by exciting the cell with charge and discharge current pulses.Here we present a new entropy characterization method via charge and discharge cycles of a LIB at low constant C-rates using simple insulating condition. Through monitoring the variations of cell surface temperature and voltage with the state of charge, the continuous variation of entropy with the state of charge can be extracted. These results were compared to classical entropy measurements obtained through the potentiometric method as shown in Figure 1. In addition, the extracted entropy variation data is input into a LIB modelling approach, combining a P2D-electrochemical sub-model for battery operation and a 3D-finite-element sub-model for thermal behavior while battery charge and discharge. The model predictions on the cell outer surface temperature variation while charge and discharge under different C-rates are compared with the data obtained in the battery characterization tests as shown in Figure 2. Good agreements between the model predictions and tests are achieved.

Using IoT in Double Skin Facades toward Thermal Comfort: A Review

Integrating the Internet of Things (IoT) into building design and operation has ushered in a new era of sustainable architecture and enhanced occupant comfort. This paper presents comprehensive case studies focused on the application of IoT technology in the context of double-skin facades, explicitly focusing on achieving and optimizing thermal comfort. These case studies, located in an urban setting, represent a paradigm shift in architectural design principles. Double skin facades, renowned for their potential to enhance energy efficiency and occupant well-being, are further empowered through the intelligent deployment of IoT devices. This synergy between architectural innovation and digital technology is instrumental in addressing the pressing challenges of energy consumption and occupant comfort in urbanized areas. It delves into the sensors, actuators, and data analytics systems employed to monitor and control the indoor environment. Special attention is given to the dynamic adaptation of the facade system in response to real-time environmental conditions, occupancy patterns, and user preferences. One of the case studies—PH01-BRK, projects the practical application of these principles in South Dakota’s first custom passive and net-zero home, completed in 2016, using advanced thermal analysis tools, software for heating and cooling requirements, and solar data assessment. Furthermore, the paper investigates the impact of IoT-enabled double-skin facades on thermal comfort, energy efficiency, and indoor air quality within the Brookings Passive House. Quantitative data and occupant feedback are analyzed to assess the effectiveness of the IoT-driven system in maintaining optimal thermal conditions while minimizing energy consumption. The findings of this case study underscore the potential of IoT technology in revolutionizing the design and operation of sustainable buildings. It demonstrates that integrating IoT into double-skin facades can significantly enhance thermal comfort, reduce energy consumption, and create healthier indoor environments.

Precision ratiometric technique for measuring the Peltier coefficient

We present a novel ratiometric approach to independently measure the Peltier coefficient, without using Kelvin’s relation, using the ratio of two temperature signals induced by the Peltier and Joule effects, in addition to readily obtained electrical quantities: electrical resistance and current. One major advantage is that the accuracy of the temperature measurement is not critical to the calculated Peltier coefficient, primarily because of the ratiometric measurement. Crucially, the thermophysical and geometrical properties of the sample are no longer part of the proposed measurement equation under optimal thermal and geometrical conditions. As a demonstration, the Peltier coefficient of a polycrystalline n-type Bi2Te3 sintered sample is measured. The use of an AC current with an amplitude equal to the DC current intensity precisely separates the Joule heating from Peltier heating. The obtained Peltier coefficient agrees well with that calculated from Kelvin’s relation within 3%. Compared with other approaches, the proposed approach requires only one additional AC measurement, which is an accurate and a comparably effortless undertaking. This study aims to significantly advance the development of highly accurate thermoelectric metrology.

Synthesis and characterization of Eu3+-doped glass ceramics from the system CaO-GeO2-Li2O-B2O3

Three Eu3+ doped glass compositions from the system CaO-GeO2-Li2O-B2O3 were thermally treated for obtaining of the nano glass-ceramics. A series of glass ceramics were obtained under different heat treatment conditions for each glass composition. The main crystallizing phases in the three investigated compositions were Ca2GeO4, Ca5Ge3O11 or Li2CaGeO4. Research was aimed at finding the optimal thermal treatment conditions of parent glasses for preparing of glass-ceramics with optimal particle size, degree of crystallization and transparency determining high emission intensity. For this, a stepwise heat treatment was applied to obtain a series of glass-ceramic samples from the same starting glass composition. Under such treatment, the kinetics of nucleation and growth of the crystallizing phase were tracked. DTA, XRD, TEM, UV–vis analyses were used for characterization of the obtained series of glass-ceramics. Based on the results, it was concluded that the main factors determining the behavior of the crystallizing nanophase (predominant new nucleation or predominant growth of already appeared seeds) are the thermal treatment conditions and the composition and structure of the parent glass, and not so much the composition and structure of the crystallizing phase.

Experiments and CFD simulation of an air-conditioned tractor cabin for thermal comfort of tractor operators in Pakistan

Tractors are manufactured without air-conditioned cabins in Pakistan. This leads to thermal discomfort for tractor operators working under direct solar exposure. Therefore, this study aimed to design and install an air-conditioned cabin on a tractor. Experiments were undertaken to evaluate the installed cabin performance under two scenarios i.e., conventional (S–I) and enhanced (S-II) air distribution. Computational fluid dynamics (CFD) simulations were used to analyze airflow and calculate thermal comfort indices. The results showed that the air-conditioned cabin attained optimum thermal conditions under the enhanced air distribution scenario (S-II). In this scenario, the inside cabin temperature was an average of 27.4 °C, compared with 30.4 °C in S–I. The relative humidity remained similar in both scenarios, around 53 %. The temperature difference between the cabin and the ambient environment was 11.09 °C in S-II, aligning with the thermal comfort conditions outlined in ISO 14269–2. Furthermore, the CFD simulations showed a predicted mean vote (PMV) index of 0.61 and the percentage people dissatisfied (PPD) index of 26.5 %. These results also confirm the provision of optimum thermal conditions for operator inside the cabin. The simulations also demonstrated good agreement with experimental data, with a small difference in air temperature (2 °C) and relative humidity (5.8 %). In the light of these findings, this study recommends installation of air-conditioned cabin on tractors with enhanced air distribution (S-II) in Pakistan to improve thermal comfort of operators.