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Energy Conversion (EC) Systems

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Thus, it can be said that entropy is a measure of the 'unavailability' of internal energy. Power Cycle Components/Processes Most power and propulsion devices can be considered to comprise a number of simple processes. The most common are: expansion, compression, heat exchange, mixing, separation of constituents of mixtures, and chemical reactions including combustion of fuels. Expansion In power plants expansion generally occurs at temperatures above the environmental temperature. Except for throttling, the purpose of an expansion process is to deliver power at the expense of a reduction in the exergy of the stream of the working fluid. Most common expanders are rotodynamic and are usually treated as adiabatic. Expansion can occur as a single or a multi-stage expansion process. Compression In applications such as power plants, compressed air installations, gas pipelines a liquefaction plants compression usually starts at approximately environmental temperature. In refrigeration plants and heat pumps, compression processes start at temperatures lower than To, but usually end above it. Heat Transfer Heat transfer processes may be usefully divided into two groups. Group 1: In this group of heat transfer processes the thermal component of exergy of one stream increases at the expense of a reduction in the thermal component of exergy of another stream. Thus in this case a heat exchanger transfers thermal exergy between two streams through conductive, convective or radiant heat transfer. Since there is a useful output expressible in terms of exergy, a rational efficiency can be formulated. Group 2: This group of heat transfer processes is characterized by transfer of thermal energy to or from the environment. In some heat transfer processes such as those found in cooling towers and refrigerator condensers, the stream, at T > To, transfers heat to the environment. In heat pump evaporators, however, the stream is at a temperature lower than To, and heat transfer is from the environment. In either case the exergy of the stream decreases as a result of the heat transfer, and since the exergy of the environment can never increase, heat transfer processes in this group lead only to dissipation of exergy. ...read more.


Sulfur: An element present in varying quantities in coal; contributes to environmental degradation when coal is burned. The sulfur content in coal is low if 1% or less, medium if between 1% and 3%, and high if over 3%. Total Resources: Coal deposits both known and undiscovered, estimated at 4 trillion tons in the U.S. and as much as 14 trillion tons worldwide. Turbine: A device with rotating vanes for generating rotary mechanical power from the kinetic energy in a stream of fluid or gas. Underground Gasification: See In-Situ Gasification. This document was downloaded from Coursework.Info - The UK's Coursework Database - http://www.coursework.info/ This document was downloaded from Coursework.Info - The UK's Coursework Database - http://www.coursework.info/ This document was downloaded from Coursework.Info - The UK's Coursework Database - http://www.coursework.info/ This document was downloaded from Coursework.Info - The UK's Coursework Database - http://www.coursework.info/ This document was downloaded from Coursework.Info - The UK's Coursework Database - http://www.coursework.info/ This document was downloaded from Coursework.Info - The UK's Coursework Database - http://www.coursework.info/ jj�j�j�j�jokpk�k�kSlTl�l�l�l�l������������h�h�OJQJh�h�CJOJQJ%h�h�OJQJfHq� ����)h�h�CJOJQJfHq� ����h�h84 h84h� !HITUlm���� q r s t � � i j k l � � �� �����������������������������gd84j�l�� UV`a����PQQR����hi��'(xy�������������������������������gd84��,-01��ST" "M$N$�%�%&&�&�& ' '�'�':+;+�+�+�+�����������������������������gd84�+�+'-(-////0000006070�0�0�0�0�0�0#1$1:1;1�1�1�1�1�����������������������������gd84�1�2�2�2�2 3 3�5�5�5�5�7�7�7�7�8�8�8�8�:�:�:�:�;�;�;�;<<�=�����������������������������gd84�=�=�A�A�A�A,B-B`BaBqBrB�B�B�B�B�B�B�D�D�D�D�F�F�F�FNIOI�J�J�����������������������������gd84�J�J�J`KaKLLFLGL�L�L^M_M,N-N�N�N{O|O�O�OP POQPQ�Q�Q�Q�Q�R�����������������������������gd84�R�RMSNS�S�S�T�TUU�U�UV�V�V�V0W1W�W�W�X�XYY�Y�YZZ�Z�Z�����������������������������gd84�Z�[�[#\$\]]�]�]P^Q^+_,_~__A`B`-a.a�a�aKbLb�b�b3c4cdde�����������������������������gd84eeJeKe f f�f�fg g�g�g�h�hbici�i�ijj�j�j�j�j�j�jkk���������������������������$a$gd�gd84kpkqkrksk�k�k�k�kTlUlVlWl�l�l�l�l�l�l������������������gd84$a$gd�$a$gd�&1�h:p84��/ ��=!�'"�'#��$��%��D@�D NormalCJ_H aJmH nHsH tHDA@�D Default Paragraph FontRi�R Table Normal�4� l4�a� (k�(No ListDZ@�D 84 Plain TextCJOJQJ^JaJ4@4 �Header ���!4 @4 �Footer ���!`�o"` �watermark header$a$CJOJQJfHq� ����N�o2N �watermark footer$a$ CJOJQJ�d�����r�V�:���l7 �+�1�=�J�R�Zek�l8:;<=>?@ABC�l9bb�b�b�bcqcsc�c�cUdWd�d�d�d��alex��84�@b,�q�dP@��Unknown������������G��z ��Times New Roman5V��Symbol3&� �z ��Arial7&� � �VerdanaG5�� �����h�MS Mincho-�3� fg?5� �z ��Courier New"1���h��f��f��f��S�$��S�$$�������4�b�b3�� H�?������������������84��Energy Conversion (EC) Systems TCoursework.Info Coursework - http://www.coursework.info/ - Redistribution ProhibitedTCoursework.Info Coursework - http://www.coursework.info/ - Redistribution Prohibitedalexalex�� ��Oh��+'��0|���(8��� , 8 D P\dlt� Energy Conversion (EC) Systems UCoursework.Info Coursework - http://www.coursework.info/ - Redistribution ProhibitedualexewoUCoursework.Info Coursework - http://www.coursework.info/ - Redistribution Prohibitedu>Downloaded from Coursework.Info - http://www.coursework.info/is Normal.dotfalexl.d2exMicrosoft Word 10.0@@�r È�@�r È�@�r È���S�� ��Õ.��+,��D��Õ.��+,���<���H����� ���� � �UCoursework.Info Coursework - http://www.coursework.info/ - Redistribution Prohibiteds UCoursework.Info Coursework - http://www.coursework.info/ - Redistribution Prohibiteds UCoursework.Info Coursework - http://www.coursework.info/ - Redistribution Prohibiteds 5c$��bA Energy Conversion (EC) Systems Titled@���+K_PID_LINKBASE CopyrightDownloaded FromCan RedistributeOwner�A4http://www.coursework.comcoursework.comehttp://www.coursework.com No, do not redistributecoursework.com/ !"#$%&'()*+,-./0123456789:;<=>?@ABCD����FGHIJKL����NOPQRST����VWXYZ[\��������_������������������������������������������������������������������������������������������������������������������������������������Root Entry�������� �F�!�È�a�1Table��������EWordDocument��������(�SummaryInformation(����MDocumentSummaryInformation8������������UCompObj������������j������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������ ���� �FMicrosoft Word Document MSWordDocWord.Document.8�9�q ...read more.

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