Carbon dioxide detection is a relevant issue in many fields, and this work focuses on the use of a BaTiO(3)-CuO sputtered thin film layer in a gas sensor prototype for air quality measurements. For this, a double side sensor was fabricated, with a Pt heater on one side and the sensing layer over the electrodes on the other side. The uniformity of the temperature on the sensing layer was tested ...

Packed bed is generally recommended for attaching with solar air heater in order to store thermal energy of hot air. For designing such a system under the given system and operating parameters, it is required to predict performance of the system by using mathematical models. In the present paper an attempt has been made to discuss mathematical models reported in the literature for predicting th...

Compressed air energy storage (CAES) is a large-scale technology that provides long-duration energy storage. It is promising for balancing the large-scale penetration of intermittent and dispersed sources of power, such as wind and solar power, into electric grids. The existing CAES plants utilize natural gas (NG) as fuel. However, China is rich in coal but is deficient in NG; therefore, a hybr...

Pengeringan adalah proses perpindahan panas dan uap air secara simultan yang memerlukan energi untuk menguapkan kandungan air. Energi ini biasanya bisa didapatkan dari sinar matahari. Namun ketika musim penghujan, kondisi menghambat pengeringan memanfaatkan matahari, sehingga membutuhkan waktu cukup lama. Maka itu diperlukan suatu alat bantu dapat mengeringkan baju tanpa tergantung pada sumber ...

NASA has identified the Stirling power converter as a prime candidate for the next generation power system for space applications requiring 60,000 hours of operation. To meet this long-term goal, several critical components of the power converter were analyzed using advanced structural assessment methods. Perhaps the most critical component, because of its geometric complexity and operating env...

The conventional design of the heater in a silicon micro-hotplate employ a simple meandering resistive track to form a square element. We show that this heater structure produces an uneven thermal profile characterised by a central hot spot with a significant variation in temperature of some 50 8C across the plate at an average temperature of 500 8C. Four novel micro-heater designs are reported...

in this project, first we introduced a general rule for the design of drying processes and then, we have applied microsoft excel for this purpose. belt dryer is one of the most common dryers in the food industry. in this study, our aim was to process carrot by this dryer. we optimized the target function (total annual cost or tac) and investigated the influence of design variables on this targe...

Hybrid air heater is a device taking advantage of two or more energy sources directly indirectly for heating air. This study aims to analyze and exergy hybrid heater. It assumed that no thermal gradient exists along glass thickness one-directional variation temperature in flow direction capacity glass, absorber plate, insulations are negligible. To avoid food oxidation dryers, effects fluid suc...