... been found to provide 7.3-25.8% better thermal efficiency than the conventional air heater because of the substantial increase in the effective heat transfer surface area due to the fins. The effects of variation of design, ambient and operating parameters on the performance of the finned solar air...

... design is tested for both headwind and tailwind flow arrangements. The tailwind performance is better for smaller-size Joukowski ribs. However, the medium- and large-size Joukowski ribs perform better in headwind configurations. At low Re, heat transfer is more dominant than friction leading to higher...

...Abdulmajeed Alghamdi; S. A. Sherif This paper presents an investigation of the performance indices employed in combined or multigeneration thermal systems. Specifically, the following thermal systems will be considered: (1) combined cooling and power (CCP) systems; (2) combined heating and power...

... and compared with experimental results. Three different ETSC configurations made of copper viz., Model 1 (M1) having one inlet and two outlets, Model 2 (M2) having one inlet and three outlets, and Model 3 (M3) having one inlet and four outlets are considered. An overall rise in temperature of heat transfer...

...Julia Haltiwanger Nicodemus; Joshua Smith; Alexander Holme; Sarah Johnson; Kyle Petitt The effect of the pitch of a copper coil heat exchanger immersed in a hot water storage tank on heat transfer from the storage tank to the heat exchanger working fluid is investigated. The storage tank...

... is kept constant. The channel design that gives the best performance was further investigated by incorporating a sinusoidal wavy absorber having variable wavy roughness parameters. The flow and heat transfer characteristics have been evaluated in terms of friction factor (f) and Nusselt number per unit...

...Eydhah Almatrafi; Abdul Khaliq A solar powered trigeneration system consisting of tower solar collector, Kalina cycle with the heat exchanger, and ejector-absorption refrigeration cycle is proposed to produce refrigeration below freezing, electricity, and process heat, simultaneously. Simulation...

...M. Keith Sharp This study tests the feasibility of a more climate-friendly approach to space conditioning. This new strategy (called Ambient House) employs thermal mass in conjunction with ambient sources of heat and cold to maintain indoor temperature within a comfortable range with no auxiliary...

...Moulay Ahmed Janan; Mohamed Taqi; Hamid Chakir In this work, we demonstrate the improvement of thermal performances of a heat pipe parabolic trough solar collector by optimizing the annulus space, between the evaporator and the glass envelope, and using an appropriate filling gas. We compared...

...Amin Shahsavar; Seyed Amin Bagherzadeh; Masoud Afrand In this study, an attempt is made to assess the feasibility of several machine learning techniques for forecasting the energetic performance of a hybrid renewable energy unit consisting of an earth-air heat exchanger (EAX) and a building...

... min at the end. The state of equilibrium is that in which the mass of the product between two successive weighs remains constant. To obtain the dry matter (DM) of the product, it is placed in an oven heated at 105 °C for 24 h. The equipment should be prepared 30 min before introducing the tray...

... been primarily solved in the steady state. While the second has been solved by considering transient variations in the environmental or operating conditions, but with a heat conduction model in steady state. To the best of our knowledge, there are no analytical transient two-dimensional (2D) (r, φ...

...Gaurav Saxena; M.K. Gaur The present experimentation work discloses drying of hygroscopic crops under the new concept of solar-assisted greenhouse type dryer integrated with evacuated tube water heating system to control and maintain the temperature of the greenhouse environment according...

...Dhananjay Kumar; Laljee Prasad The use of artificial roughness is an efficient and commercial way to appreciate the thermal performance from the collector to the air in solar air heater ducts, for numerous applications such as space-heating, crop-drying, and seasoning of timber industrial purpose...

... efficiency energy environment heating measurement renewable simulation sustainability Renewable energy is a topic of interest due to global energy consumption growing at an alarming rate. Within the last 20 years, building energy consumption in developed countries has grown overall usage...

...Moulay Ahmed Janan; Mohamed Taqi; Hamid Chakir This work reports the design, numerical modeling, and optimization of a new solar water heater using a heat pipe parabolic trough collector (HPPTC) with low concentration ratio. The heat pipe evaporator is positioned on the focal axis of the reflector...

...Neeraj Mehla; Manoj Kumar; Avadhesh Yadav This manuscript has been presented to evaluate the annual performance of evacuated tube solar air collector (ETSAC) by using phase change material (PCM). The PCM (acetamide) simultaneously stores and exchange the heat to the air amid day hours. The heat...

... of heat transfer of air, the solar-assisted air heater has low thermal performance which can be improved by creating local turbulence using surface roughness on the heat transferring plate. The present investigation has been conducted to perceive the influence of the curved-ribbed element with gap on flow...

... of heating buildings built in the colder regions of the country. To address this gap, the present work focuses on the thermal behavior of social housing in the regions of Mexico with cold semi-arid climate. We found that thermal discomfort inside houses is primarily driven by low temperatures. We calculated...

...S. M. Shalaby; A. E. Kabeel; E. El-Bialy; M. K. Elfakharany Low thermal conductivity is the main drawback of using paraffin wax as a latent heat thermal storage material in the solar air heater (SAH). In order to overcome this drawback, an absorber plate with extended surfaces through the paraffin...