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[en] Our oil explorations both onshore and offshore have thrown open bright prospects of cogeneration by using natural gas in gas turbine power plants with heat recovery units. Both for co-gen and combined cycle systems, supplementary firing of GT exhaust gas is normally required. Hence, duct burners have significant role for effective contribution towards of efficacy of heat recovery system for gas turbine exhaust gas. This article details on various aspects of duct burners in heat recovery systems. (author)
[en] A thermoeconomic feasibility analysis is presented yielding a simple algebraic optimization formula for estimating the optimum length of a finned pipe that is used for waste heat recovery. A simple economic optimization method is used in the present study by combining it with an integrated overall heat balance method based on fin effectiveness for calculating the maximum savings from a waste heat recovery system
[en] The thermal process of wastes with higher calorific value by pyrolysis is reviewed to recover the value added three by-products; a pyrolytic char, a pyrolytic oil, and a non-condensable gas. These by-products from pyrolysis of the waste is converted for electricity power and thermal energy thru gasification process as well as waste heat recovery process. The energy resource and several processes in the integrated pyrolysis gasification combined cycle for waste treatment are investigated with the conceptual design in using the obtained operation data from the pyrolysis pilot, demonstration and commercial plant.
[en] Drilling platforms are rather inefficient when it comes to their own power supply. In view of ecotax and their environmental image, the offshore industry particularly the Norwegians is highly committed to changing this situation. An efficient power plant, specially designed for the offshore industry, might just prove to be the answer to their prayers
[en] One of the most popular and feasible strategies to reduce costs for electrical and other energy supply in remote communities is the development of wind-diesel systems. In these systems, a significant share of the electrical energy requirements of a community can be provided by wind turbines connected to the community electrical distribution system. One of the characteristics of the systems having a relatively large ratio of wind turbine capacity to community load, called High Penetration Wind-Diesel Systems (HPWDS), is that during high wind periods there will be electrical energy available in excess of the net load on the system. An important concept of the HPWDS strategy is that this excess energy can be directed to a practical use, such as heating. The concept of HPWDS was shown to be economically and technically feasible in communities having no heat recovery on the diesel plants. It proved to be even more attractive as a strategy for self sufficiency of electrical supply in communities with waste heat recovery. 1 fig., 1 tab
[en] The application of large gas turbines to combined cycles for power production has increased significantly in the past ten years. Heat Recovery Steam Generators for large power plant applications have been developed to meet utility customer needs for compressed delivery and installation schedules, compliance with present and future emissions requirements, dispatchability, ruggedness and maintainability. This paper discusses design features of the current generation of HRSGs that promote modular shop assembly, minimum field erection, and characteristics that provide the ability to perform in quick start-up and daily cycle service
[en] Drying is a very sophisticated process which consumes a large amount of energy. Solar energy can be used as an alternative or supplementary energy source to fossil fuels. Solar dryers are common ways for saving fossil fuel consumption during agricultural products drying. In this study, the performance of an active solar dryer equipped with an energy recovery system was investigated at three levels of drying air temperature. The results showed that the energy recovery system was able to increase inlet air temperature by 16.8, 18.5 and 18.9 ° C at drying temperatures of 55, 65 and 75 ℃, respectively. Meanwhile 47.8, 42.9 and 40.9 percents of the dryer exhaust air energy were recovered respectively at these conditions which subsequently led to a reduction of 30.7, 19.2 and 14.7 percents in electrical heater energy consumption.
[en] Outstanding thermal efficiency, low installed cost, reliability, environmental compliance and operating flexibility demonstrated by operating experience: All are key factors in the worldwide acceptance of steam and gas turbine combined cycles for electrical power generation. Since 1949, General Electric has furnished 34,000 megawatts of power generation combined-cycle equipment for projects around the world. Two of the most recent, and largest, of those projects are a 2,000-megawatt combined-cycle plant beginning combined-cycle operation for Korea Electric Power Company and a 2,000-megawatt combined-cycle plant being operated by Tokyo Electric Light and Power (TEPCO). TEPCO now is planning an even larger, 2,800-megawatt combined-cycle facility. (author). 11 figs., 2 tabs
[en] An equipment flow sheet has been developed for a mobile pilot-plant (MPP) to produce environmentally clean steam. The unit consists of a single-stage heat transformer (SSHT) coupled to a mechanical vapour recompression system (MVR) with a nominal output capacity of 260 kg/h of saturated steam at 3 bar absolute pressure for a liquid feed at a temperature of 80oC. It is proposed to have the unit on skids to be transported by a pickup truck or lorry to various industrial locations for demonstration and training purposes, in order to acquaint industrialists with an environmentally clean and energy-efficient technology. (author)