The objectives of this research were to construct a jar oven for the production of roasted chicken using heat from far-infrared radiation and to find the amount of electricity and specific energy consumption used in the production of roasted chicken. The physical properties in terms of color softness cooking yield and water holding capacity of roasted chicken were also investigated. By using far-infrared radiation at electrical power levels of 1000 1200 and 1400 watts to roast marinated chicken which had an initial mass of about 1650 grams until the mass of the roasted chicken had a lower than 1220 grams. From the experimental results it was found that the production of roasted chicken at far- infrared radiation with a high electrical power level requires significantly less electricity and specific energy consumption than that with low electrical power level (P≤0.05). Roasted chicken breasts with far-infrared radiation at 1400 watts had significantly higher lightness (L value) but lower redness (a value) and yellowness (b value) than those of 1000 watts (P≤0.05). However lightness (L value) yellowness (b value) and redness (a value) of the roasted chicken breast with far-infrared radiation at 1200 watts were not significantly different from those at 1000 and 1400 watts (P>0.05). The shear force and water holding capacity of roasted chicken were significantly increased when the electrical power levels of far-infrared radiation increased (P≤0.05). Moreover the electrical power levels of far-infrared radiation (1000 1200 and 1400 watts) did not significantly affect the cooking yield of roasted chicken (P>0.05).Sponso

The objective of this research is to study the combustion characteristic of a low-pressure vertical port burner using computational fluid dynamics (CFD). The simulation model was created using Fluent 6.3 in 3D-model of the same size of the burner. The CFD results were verified by measuring the temperature around the burner head and a vessel. Moreover the results of conventional vertical port burner having the swirl angle of 90o and the inclination angle of 90o (CB-S90I90) and two swirl port burners (SB) being SB-S90I13 and SB-S30I90 were compared. The temperatures obtained from CFD and experiments were similar which the error was less than 9%. From the CFD’s results the temperature and heat flux of the SB-S90I13 burner were higher than those of the CB-S90I90 burner. The maximum temperature and heat flux of SB-S90I13 burner were 1445 K and 5291 W/m2 respectively. It was implied that the combustion characteristic and heat transfer to the vessel of SB-S90I13 burner was better than that of CB-S90I90 burner. It was resulted that the thermal efficiency of SB-S90I13 burner was better than that of CB-S90I90 burner which was the percentage energy saving of 6.93%.

A closed wet cooling tower became popular for heat transfer process but the existing system was not sufficient for the heat transfer of the manufacturing line. This research aimed at investigating the heat transfer enhancement of the 200-ton closed cooling tower by installing spray nozzles to spray water to the condenser. The distance between the spray nozzles and the condenser were 20 30 40 50 and 60 centimeters. The mass flow rates of water spray were 8 10 12 and 14 liters per minute. The objectives of the study therefore were to study the heat transfer coefficient of cooling water and to evaluate the economic value of this improvement option’s investment costs. In this study the outlet temperature of the cooling tower was set to be less than 37°C the difference of inlet and outlet water temperature was 2.9°C and the overall heat transfer rate approximated 360 kW. The results of the study reported that the distance of the spray nozzles and the condenser was at 30 centimeters and the mass flow rate of water spray was 12 liters per minute. The rate of heat transfer was 362 kW. The efficiency of the cooling system was 0.8 which became suitable for real use. In addition to considering value investing the results showed that the payback period was 0.47 years and the net present value was 1693801 baht. The rate of return received from the project was 207% which was worth investing.

At present global warming is a major problem that needs to be addressed and mitigated. The problem arises because human housing construction is increasing. The surface of the soil which is a source of vegetation was scattered by the building. The impact of the construction resulted in higher overall temperatures. This is caused by the heat accumulated in the building material. Particularly for building materials that have been exposed to direct sunlight this has had an impact on the comfort of the occupants in the building. This research is an experiment to make a wall of plants from a tattoo. The natural plant material was planted to study the solar radiation efficiency of the planting wall of the tattooed leaves installed on the test box. Based on the analysis of the data it can be concluded that the test wall covered with vegetation leaves the temperature lower than that of the other walls. Different test walls make different internal and external temperatures. Sun radiation affects the test wall temperature varying according to the amount of sun radiation received. Observed by changing internal and external wall temperatures at different intervals. Use plants to protect the walls to prevent heat by keeping the walls under the shade of the plant. It also radiates heat through the leaves. Leaves are a thermodynamic variable that is cooled down by the evaporation of leaves. Plants on the wall will absorb the water inside to evaporate. The temperature of the tree is cool. When combined with the airflow through the wall the shade will blow the hot air under the leaves and the water vapor from the dehydration process of the plant. The heat from the tree wall to the environment is better. As a result the internal temperature decreased.

This research aims to investigate and test the feasibility of the production of natural teak sheets and study the appropriate production methods. Study physical properties and mechanical properties to compare with industry standard insulation sheet. The ratio of tattoo and hyacinth. 5% 7% 9% of the material were dried at 400 600 800 kg / m3. The results showed that the modulus rupture. Elastic modulus And thickness swelling. It varies with the amount of glue. The nature of the tattoo causes absorption in the material if the density increases the water absorption will decrease. Compared to standard insulation products. The amount of adhesive is 7% of the weight of the material when dry. The density of 800 kg / m 2 is 25 kg / cm2. 140 degree Celsius ruptured modulus and elastic modulus But the thickness of the swelling has not met the criteria. In the next production should be mixed waterproofing in the work.