In this study the integration of an absorption heat pump (AHP) with the concentration section of an industrial pulp and paper process is investigated using pinch technology. The optimum design of the proposed water-lithium bromide AHP is then achieved by minimizing the total annual cost. A comprehensive optimization is carried out by relaxation of all stream pressure drops as well as heat excha...

The effects of heat and mass transfer on MHD mixed convection flow of a vertical surface with radiation, heat source/absorption and chemical reaction has been is discussed. The resulting set of coupled non-linear ordinary differential equations is solved by perturbation technique and for graphs we used MATLAB software. Approximate solutions have been derived for the velocity, temperature, conce...

A temperature jump in the water traveling through a pipe is delayed by the absorption of heat into the pipe wall. The convective transport of heat by the water and the conductive exchange with the interior pipe wall are described by a singular micromodel. The limiting form is a distributed microstructure model, which is successively better approximated by simpler firstand second-order kinetic m...

The relation between shortening heat and sarcomere length was studied using fiber bundles from frog semitendinosus muscles as well as using whole muscles. The initial sarcomere length was varied between 2.0 and 3.66 micron. Shortening heat was estimated as the excess heat produced after a rapid isovelocity release in a 3 sec tetanus at 0 degrees C. The isometric control heat was measured in the...

Gradual increase of the Earth's surface temperature can cause many significant changes on the climate of our planet. This problem is progressively increasing. One of the main reasons for this phenomenon is the absorption of the Sun's energy and lack of proper reflection of emissions due to man-made activities, one of which is the increase in black surfaces. In this descriptive and cross-sectio...

The problem of steady, laminar, buoyancy-induced flow by natural convection along a vertical permeable surface immersed in a thermally-stratified environment in the presence of magnetic field and heat generation or absorption effects is studied numerically. Conditions for similarity solutions are determined for arbitrary stable and unstable thermal environment stratification. Numerical solution...

Absorption process is normally used for chilled water production at district cooling plants. Besides enhancing the efficiency of the plant, the process assists in reducing the emission of CO2 to the environment. The absorption system is also installed at a district cooling plant at Universiti Teknologi Petronas. The system is operated using waste heat from the gas turbine to produce chilled wat...

The error resulting from heat conduction i the measurement ofthe ultrasonic absorption coeffcient using the transient thermoelectric method is studied analytically. An expression for the temperature increase in a tissue specimen of finite dimensions, irradiated by a focused ultrasonic transducer, isgiven as a function of spatial coordinates, time, radial and axial beam dimensions, and absorptio...

Received: 5 April 2004 / Accepted: 14 June 2004 / Published: 15 June 2004 __________________________________________________________________________________ Abstract: On the basis of a four-heat-reservoir endoreversible absorption refrigeration cycle model, another linear heat transfer law [i.e., the heat-flux ) ( 1 − ∆ ∝ T Q ] is adopted, the fundamental optimal relation between the coefficien...