Base on space standards, the thermal design evaluations for satellites are performed using thermal balance tests. Regularly, the thermal model is used for the thermal balance test. This model is completely similar to the flight model of the satellite in terms of thermal characteristics. In this paper, the definition and implementation of thermal balance tests for Thermal model of AUTSAT Satellite is conducted. the evaluation of the TM and the procedure data Correlation of the numerical model have been focused. In order to increase the accuracy and feasibility of thermal mathematical model correlation, structural and complete models are considered for the balance test separately. In this study, the results of thermal balance test for the structural thermal model has been compared with the numerical analysis and the correlation procedure is illustrated. The results achieved by this procedure shows that all the requirements by the standard are satisfied in this level.

Axially moving beams are extensively involved in various industries and have significant importance in many mechanical engineering problems. In this paper, the nonlinear forced vibrations of axially moving beam under harmonic force and thermal environment have been studied. In order to considering the effects of transverse shear deformation and rotary inertia, the Timoshenko beam theory has been used to model the axially moving beam. The nonlinear governing equations are derived with the help of Hamilton’s principle. Then the equations and boundary conditions are discretized through generalized differential quadrature method (GDQ) and its differential matrix operators, and accordingly the partial differential equations are converted into the ordinary differential equations. To study the frequency response of the system, the harmonic balance method is used. Also the time responses of the axially moving beam are obtained by the Runge-Kutta method. In a case study, the effects of various parameters such as the axial speed, transverse force acting on the beam, damping coefficient and temperature change on the frequency responses of the axially moving beam with both end simply supported boundary conditions are discussed. The results show that the dynamic behavior of system is significantly affected by any of the mentioned factors.

Based on the design of boilers in the most optimal operating mode, the percentage of energy losses, has a strong impact on the efficiency of these equipment. By identifying the sources of energy losses and finding solutions to reduce fuel consumption and save energy, an important step can be taken to improve the efficiency of boilers. In this research, the thermal performance and operational efficiency of the boilers of the Isfahan refinery are studied. The ASME PTC4 is the reference code for boiler performance testing, which accurately determines the performance of boilers based on their technical and operating specifications. The sources of heat losses in the boiler assembly are identified and significant losses are specifically investigated to propose the solution. To reduce the remarkable losses and increase the boiler efficiency, installing an economizer to use the heat available in the boiler stack to heat the boiler inlet water, is recommended.

Desirable combination of weather temperature, relative humidity, air movement and mean radiant temperature, present a certain zone which provides thermal comfort for the majority of people. One of the most important issues, which should be considered before building a construction, is the accurate estimation of the thermal comfort within the designed building. Thus, evaluation of thermal condition of a building in design stage will cause an opportunity to change and modify design elements and materials. In this paper, an attempt has been made to discuss about effective parameters that influence human physical comfort and then four different procedures have been presented to predicting thermal comfort zone.

The maritime transport industry, often referred to as the backbone of global trade, plays a pivotal role in facilitating the movement of goods across international markets. Despite its importance, the industry is plagued by several persistent challenges that hinder its operational efficiency and sustainability. Among the most critical are the imbalance of empty containers, environmental degradation due to emissions and fuel consumption, and inefficiencies in port operations. These issues collectively pose serious implications for cost management, environmental impact, and service reliability. In an effort to address these concerns, this paper proposes a novel multi-objective mathematical model that seeks to optimize three primary goals in an integrated manner: maximizing economic profitability, minimizing the imbalance of empty containers, and enhancing environmental sustainability. The model is designed to reflect real-world shipping dynamics, incorporating the interactions between liner and feeder ships, multiple sea routes, and various types of ports, including hub, feeder, and satellite ports. To demonstrate the practical applicability and robustness of the model, a case study is conducted on a representative shipping network involving selected ports in the Middle East and East Asia. The model is implemented using the General Algebraic Modeling System (GAMS), and its outputs are analyzed across three distinct time periods. Results indicate a significant reduction in the number of empty containers, along with concurrent improvements in both cost-effectiveness and environmental performance indicators. Additionally, a comprehensive sensitivity analysis underscores the pivotal role of ship capacity in influencing system outcomes. However, it also reveals that improvements in a single dimension are insufficient for holistic system optimization. Effective and sustainable management of maritime transport requires a multidimensional strategy that balances economic, environmental, and operational factors. The proposed model offers valuable insights for decision-makers aiming to improve the resilience and sustainability of global shipping networks.

Day lighting is one of the important qualitative factors in housing, which is also effective on health and well-being of occupants. Extensive glass surfaces and Transparency in building facades provides good daylight quantity for interior spaces. However, this lighting system is not appropriate for climates faced with higher sunlight radiation (Such as hot-humid areas), due to overheating and disturbing the thermal comfort. There are efficient day lighting strategies in the traditional Iranian architecture as one of the valuable remaining heritages of Human experiences, which are useful for contemporary architecture. This article intends to investigate daylight quality in the houses of Bushehr from Qajar period by modeling and simulating in daylight calculation software (Dialux) and identify day lighting strategies utilized in these houses. As Bushehr city is located in the hot-humid region of Iran, is faced with high sunlight radiation, making balance between receiving light and heat gain through windows needs careful attention. The houses of Qajar period in Bushehr are evolved samples of traditional architecture in the city and Rashidy house (built in 1893) is one of them which its form and details can reveal many lessons on coping with climate by merely using renewable energies.