3rd TAGRA

Thermoelectric cooling (TEC) systems offer several advantages, including compact size, absence of moving parts, quiet operation, and environmentally friendly operation without conventional refrigerants. In this study, the cooling performance of a thermoelectric module was experimentally investigated for two different applications: refrigeration and air conditioning. In the refrigeration...

Transient heat transfer in a U-tube geothermal borehole heat exchanger embedded in saturated sand was investigated numerically. The energy equation was solved by the finite element method on a two-dimensional cross-section of the borehole (fluid, pipe wall, grout and sand), following the setup of the COMSOL Multiphysics Heat Transfer module. Geometry, thermal properties and heat load (57.7 W/m...

The energy generation performance of photovoltaic (PV) systems is significantly influenced by environmental operating conditions, in addition to the technical characteristics of the system components. Environmental factors such as solar irradiance, ambient and cell temperature, relative humidity, wind, dust and atmospheric aerosols, cloud cover, and precipitation can affect the electrical...

Heat transfer problems in layered and multi-material systems involve discontinuous thermal conductivity, which makes the temperature gradient jump across material interfaces and challenges physics-informed neural networks (PINNs) represented by a single smooth network. This study implements a single-network PINN and a domain-decomposed extended PINN (XPINN) for transient heat conduction in a...

In this study, the effects of the number of turbulators (1, 5, 9), fluid type (water, ethylene glycol, ammonia), absorber surface coating (standard, Black 2.0, Black 3.0), and fluid mass flow rate (50, 100, 150 kg/h) on the thermal performance of a flat-plate solar collector (FPSC) were investigated using both numerical (ANSYS-Fluent, CFD) and experimental methods. The Response Surface Method...

In recent years, thermoelectric cooling (TEC) systems have found widespread use, especially in applications requiring low cooling capacity. Their simple structures without moving parts, low power requirements, and ease of maintenance make these systems advantageous compared to traditional vapor-compression refrigeration cycles. In this study, the air conditioning performance of a...

In photovoltaic (PV) systems, a significant portion of solar radiation converts into heat rather than electricity; this raises the cell temperature and reduces electrical efficiency. This study aimed to lower PV cell temperature and generate additional electricity via Peltier modules by integrating a combination of aluminum metal foam and Peltier modules (thermoelectric modules) onto the...