This paper presents distributed STATCOM for controlling voltage in distribution line with wind turbines generations at 48 volts. The connection of wind turbine to distribution systems may affect the voltage quality offered to the consumers. One of the factors contributing to this effect is the rapid variations of the wind turbine output power which cause respective fluctuations in the supply voltage. This paper presents the design control and analysis of a Distributed STATCOM when combined with a wind turbine comprising small variable speed generators in this paper it is shown that the distributed STATCOM controlled via a rotating referent frame: RRF and recursive DFT are simple method to DSP control technique. The result of experiments the STATCOM can improve the transient stability voltage of wind turbine that we have referred the IEEE1159:1995 standard of power quality.

Here we present an experimental study of the single-effect adsorption cooling system using activated carbon-methanol working pair. The test unit was comprised of an adsorber a condenser and evaporator in vertical alignment. Heating and cooling of adsorber was mainly done by hot and cold water circulating through the water jacket. The evaporator and condenser was heated or cooled by flows of water through the internal coil. The adsorber was analyzed for its cooling rate when cooling was done by two approaches either cooling water and/or three thermosyphon heat pipes which both methods gave shortest cooling time. The investigated heat source and sink temperatures are; hot water temperature supplied to adsorber (70 80 90 oC) and cooling water temperature supplied to condenser (5 10 15 oC). An ultrasonic wave generator was attached to the bottom end of the evaporator to generate wave frequency varied by 8 10 and 14 kHz during evaporation phase. The ultrasonic wave can obviously reduce the evaporation time of methanol as well as to improve the system performance in terms of COP SCP and VCP. The system performance was considerably comparable to those from literatures. The highest COP and SCP obtained from this system was 0.718 and 248.90 W/kg respectively.

Recently scientists have focused attention on soil as a major source and sink for atmospheric CO2. Three replications of two-depth soils from eleven different ecosystem types from Sakaerat Environmental Research Station (SERS) Sakaerat Silvicultural Research Station (SSRS) and Suranaree University of Technology (SUT) Nakhon Ratchasima were collected during the first week of March 2010. The soils were then incubated at 25°C for three days and measured their respiration rates. The highest soil respiration rate was found in sunflower with 0.823 μmol CO2 g-1 h-1 while the lowest was found in eucalyptus plantation in SUT with 0.005 μmol CO2 g-1 h-1. Additionally between two natural forests at SERS the respiration rate of dry evergreen forest was higher than in dry dipterocarp forest with the value of 0.037 and 0.016 μmol CO2 g-1 h-1 respectively. Whereas the soil respiration rate at SSRS forests was highest in the eucalyptus plantation (0.048 μmol CO2 g-1 h-1) and lowest in acacia plantation (0.027 μmol CO2 g-1 h-1). The overall respiration rate was higher for soils from 0-5 cm than 5-15 cm but not statistically significant difference. Soil water content and pH were positively significant related with soil respiration (p<0.01). Soil carbon however was also positively significant related with soil respiration but in lesser degree (p<0.05). Therefore soil water content and pH should be major driving forces for soil respiration.

This project design and constructions high voltage high frequency transformer or tesla transformer. The tesla transformer is design at 500 kV rating voltage and 250 kHz resonant frequency. By coupling air axle and have the air are the electric insulator between primary coil and secondary coil Which primary coil test at 60 degree Group part spark gap is will the Electrostatic gap. This paper propose and consider high voltage high frequency transformer at 500 kV and 250 kHz rated. For use a transformer aforementioned is the equipment for test flash over prenouaena of porcelain insulator and electric insulation.

Today Thailand has been facing the energy problems due to the limited sources of natural energy. Meanwhile the power consumption has been growing constantly and the tendency of consumption increases each year. Therefore to solve these energy problems especially in electricity-generating power which have been demanded throughout the country the National Economic and Social Advisory Council had a resolution to submit the Cabinet the comments on nuclear-electricity generation and proposed the government for approval on August 24 2003. The government assigned the National Energy Commission’s policy to set out the electricity production plan by nuclear power plant requiring that the power house during 2020-2021 will be established. The Electricity Generation Authority of Thailand (EGAT) has executed “the Power Development Plan 2007” established the many sets of committees to accommodate the plan and carried out surveying for dominant information for examples parameters and variables issues of resulting effect and economic expansion so that these would be summarized and submitted to the government under the production plan procedure set out by EGAT. According to the production plan for future energy reserves the new power houses have been established. To accommodate the economic expansion some potential factors needed to be taken into consideration included fuel supplied and low cost. Previous researches demonstrated that nuclear power plant was lowest on cost. In present study the appropriate model of unit cost for electricity generation in Thailand was examined. The equation was described below;....