Notice of RetractionCountermeasures of Payment Risk in Construction Contract
The contractor lacks of identification ability of risks in construction contracts, which result in loopholes and risks that could be avoid in the signing and implementation process of the instruction contract. Due to lack of identification and prevention of these risks, lead to the losses of the contractors in the project construction courses. To the contractor, the significant risk is the owner's payment risks. It is a universal phenomenon there exist plenty of owners in arrears with project payment or repudiate payment, which result not only from insufficient management of contractors, but also closely related to the credit of owners. This paper firstly elaborate contract management of construction project, and then analyze the risk of construction contract and put emphasize on employer payment risk. Finally, point out that employer payment bond is an effective method of risk transferring in preventing employer arrear, to ensure the profitability and construction can be carried through smoothly.
Surety Bonds for Construction Contracts
This book presents the complex field of suretyship for construction contracts by describing and analyzing each element of the surety bonding process in basic terms. Russell unravels the suretyship puzzle through numerous examples and extended case studies drawn from real-world experience. Sample bond forms and surety documents, as well as an extensive glossary of key terms, serve to further illustrate each step of the bonding process.
Simulation and control of hybrid renewable energy system connected to the grid
This paper presents a control and simulation of hybrid renewable energy system connected to the grid. The studied system includes a photovoltaic panel, synchronous permanent magnet generator based wind turbine, and a battery for storage energy. The PV array and wind systems are connected to the common DC bus by a boost converter. The battery is connected by a bi-directional DC/DC converter, and then integrated into the AC utility grid via a common DC/AC inverter. In order to extract the maximum energy, a simulation study has been carried out according to the meteorological conditions (wind speed and variable solar irradiance) while maintaining power quality at a satisfactory level. In order to capture the maximum power, a MPPT algorithm is applied for both wind turbine and photovoltaic panel. The modeling and simulation of the whole system has been performed under Matlab/Simulink environment. The obtained results show that the current and the voltage of grid side are sinusoidal and alternative forms, and the power injected to the grid is around the power produced by the hybrid system.