Apparatus for recovery and use of waste thermal energy

Energy recovery apparatus for recovering and using thermal energy comprises multiple series of shape memory elements having decreasing transformation temperatures from one element to the next in the direction of a heating fluid to extract heat over a range of fluid temperatures to effect a shape change of each element. Cooling fluid is flowed alternately through each series of elements to cool the elements and effect another shape change. The cooling fluid exiting a preceding series of elements is used as the heating fluid of the next series of elements to extract further heat indirectly from the original heating fluid. The shape changes of the elements are converted to mechanical work

Finding the Meanings of College Drinking: An Analysis of Fraternity Drinking Stories

College drinking has traditionally been studied from a public health perspective that attempts to quantify behavior as a means toward description, explanation, and intervention. This article offers a critical and cultural approach to understanding the meanings and functions of high-risk drinking and the ways in which those meanings are reproduced within the culture. Data were collected via an ethnographic study of fraternity members at a large midwestern university to explore the communication of excessive drinking norms. Viewed from various narrative and structural theories, the study examines collected drinking stories as a source for analyzing the construction of meanings surrounding drunkenness for the fraternity subculture. Five themes emerged as functions of drunkenness for the culture. Implications for prevention are discussed