Chiều ngày 08-12, trường đại học Kinh tế - Kỹ thuật Bình Dương (BETU) đã ký kết biên bản ghi nhớ với Hội Kiểm toán viên hành nghề Việt Nam (VACPA).

Quan hệ Công chúng là ngành học vô cùng năng động đòi hỏi bạn phải luôn cập nhật những điều mới mẻ để thích nghi với sự thay đổi của xã hội, từ đó đưa ra nhiều thông điệp quảng bá có hiệu quả đến với công chúng.

Abstract: Solar chimneys can help to reduce solar heat gain on a building envelope and to enhance natural ventilation. In this work, we proposed three configurations of two solar chimneys combined with a heated wall for the natural ventilation of a room: (I) the chimneys are connected serially, (II) the chimneys are parallel and exhaust air at two separate outlets, and (III) the chimneys are parallel, but the outlets are combined. The airflow rate achieved with each configuration was predicted with a Computational Fluid Dynamics model. The results show the effects of the heat flux in each channel and the geometries of the channels. Configuration (II) shows the highest flow rate. Particularly, the proposed configurations enhance the flow rate significantly and up to 40% when compared to the typical setup with a single channel solar chimney. The findings offer a novel design option for building façades for reducing solar heat gain and enhancing natural ventilation.

Abstract: This paper reports effects of the opening areas of a wall solar chimney on the flow rate and heat transfer performance. Previous studies showed that the opening size is among the most important factors which affect the performance of solar chimneys. However, such effects for a wall-attached solar chimney whose openings are vertical have not been reported in the literature. The performance of a wall solar chimney was simulated with a Computational Fluid Dynamics (CFD) tool in this paper. The induced flow rate and Nusselt number were compared for various inlet and outlet areas. The results show that the most influencing factor is the ratio of the inlet and the outlet areas. Particularly, the heat transfer coefficient and flow rate approach constants as the inlet or outlet area is above twice the channel gap. The findings suggest that the optimum opening height is equal to the channel gap.

Abstract: Aquaponics is a method that helps to cure the scarcity of food and serves as an excellent solution to environmental problems. It is horticulture between aquaculture (farming of fish) and hydroponics (growing plants without soil). Through these techniques, it reduces the use of pesticides and fertilizer. Since the interest in aquaponics is rapidly increasing, one of the significant problems is monitoring the time, plants, and fish. This study aimed to improve the residents' long-term sustainability by offering continuous greenery supplies and fresh fish. Smart Aquaponics system is consisting of different sensors and devices. The sensor is used to monitor the consistent pH level, water level, and water temperature data. Other features also include the ability of the system to feed the fish automatically and deliver an image of the desired greenery at a set time using an Esp32 Cam. All the data gathered from the sensor will be relayed to the Blynk cloud and sends the information to the Blynk application through the IoT module. For a moment, homeowners can easily monitor and control IoT-based aquaponics remotely. The experiment results show that the system uses Esp32-Cam to successfully detect the image of the lettuce plant and upload it into Blynk App. In the water temperature, the system had a variation of temperature reading and is being shown in LCD Display together with the pH level and water level. This system reduces the amount of effort required by humans to maintain and produce healthy greenery and fresh fish.