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Technical Paper

Evaluation of Energy Use Performance of an Induction Motor Power Conditioner

1999-08-02
1999-01-2516
In recent years general merchandise and hardware stores have been marketing devices to be inserted in the power supply of refrigerators and other motor driven appliances that are advertised as a technology to reduce electric energy use and cost. The purpose of this research was to procure and test one of these devices. The testing included examining how the device modifies the standard 60 cps and sinusoidal voltage power supply and then to determine the corresponding change in electric power consumption by an induction motor as a function of mechanical load. The load is the product of motor speed which is nominally constant and the torque which is variable. The torque depends upon a combination of compressor characteristics and the low and high side pressures of the freon which is a function of the evaporator and condenser temperatures.
Technical Paper

An Assessment of Landfill Gas Energy Technologies and Issues

1999-08-02
1999-01-2715
There have been estimates that the solid waste stream of municipal garbage could be converted to 5% of the total electric power requirement. In response to this potential many high capital cost incinerators have been installed around the country during the last two decades. Success has been marginal and many have been prematurely shut down because of technical problems and public concerns about emissions and potentially toxic ash. The alternative is to continue to use landfills, but to capture the methane that is produced by the decay of organic matter for the production of heat and electricity. Several such facilities have been installed in recent years and are demonstrating increasingly favorable operation. The purpose of this project was to research the techniques and technologies that are used to harness landfill gas, along with the related considerations of state and federal regulations and public health concerns from exposing the public to unburned and uncleaned landfill gas.
Technical Paper

Modeling and Assessment of ice Storage for Air Conditioning

1999-08-02
1999-01-2719
A characteristic of any electric or thermal storage technology is that it is easy to qualitatively describe the benefits, but it is very difficult to quantify the benefit and how a storage system should be best operated since operation is both site specific and requires forecasts of future electric, heating or cooling demand. Ice storage has the advantage of being able to absorb or release heat at a constant temperature of 32 F by using the abundant mass of water as the storage medium. There is no comparable substance that is available for constant temperature storage of space heat. Thus heat storage is typically done much less effectively by sensible heating or cooling of water. Thus, storing cold is more practical than strong heat. Thus, ice for air con-ditioning has been installed at several locations and has been proposed for the expansion of the chiller capacity at Union College to meet the increased demand from two new buildings.
Technical Paper

A Combined Cycle With Gas Turbine Topping and Thermodynamically Ideal Gas Turbine Bottoming

1992-08-03
929012
It has been shown that the ideal fuel burning engine, which is named the Wicks Cycle, can be implemented as a three process gas turbine cycle consisting of isothermal compression, heat addition and reversible adiabatic expansion to the ambient temperature as well as ambient pressure. However, such a cycle operating at typical fuel combustion temperatures requires excessive pressure ratios. This paper examines whether such a cycle, or a gas turbine cycle with compressor intercooling, may be a realistic bottoming cycle in a combined cycle plant, as an alternative to either existing practice steam cycles or to the proposed alternative Kalina Cycle.
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