BUBBLE PUMP MODELING FOR SOLAR HOT WATER HEATER SYSTEM DESIGN OPTIMIZATION
Solar thermal water heating systems reduce household energy bills by using the free solar radiation provided by the sun to heat water for residential needs. In order to eliminate the need for electricity to run a pump to drive the fluid circulation in these systems, fluid buoyancy effects can be employed to move the fluid from lower elevations to higher elevations. There are several operational challenges with conventional “thermosyphon” systems, such as reversing flow and overheating, which can all be addressed by using a bubble pump mechanism. Although the solar thermal bubble pump water heating system has been on market, little research has been done on the optimization of the system to improve its efficiency. Engineering Equation Solver software is used to implement a mathematical model for the bubble pump system operation. The model allows for parametric studies of the design attributes to investigate optimum efficiency conditions for the thermally driven pump.
Numerical Simulation of Bubble's Motion in Vertical Tube
The problem was derived from a simple process in solar water heating system. In a new designed electro less separated system we involved a kind of bubble pump. Beside experiment analysis, numerical simulation of the core of bubble pump is also very important. In this paper we investigated the motion of bubbles in vertical tube in two dimensions. The heat and mass transfer was simulated. The result of numerical simulation give a significant help of optimize design of bubble pump.
Theorising heterosexuality : telling it straight
Heterosexuality and social theory heterosexuality and feminist theory heterosexuality and domestic life heterosexuality and social policy heterosexuality and the desire for gender recognition and heterosexual desire heterosexuality and masculinity - theorizing male power or the male wounded psyche? which one's the man? - the heterosexualization of lesbian sex in the same boat? - the gendered (in)exeperience of first hetero-sex collusion, collaboration and confession - on moving beyond the heterosexuality debate.