Heat transfer on the microand nano-scales has quickly become an important area of research and development due to its implications for use in MEMS/NEMS devices and electronics cooling [1–4] in the past decade. As these devices become more powerful with reduced volume/surface they will in turn generate more heat in a small area within a short time period, which needs to be removed as efficiently...

Two power plant schemes that reduce CO2 emission and employ natural gas reforming were analyzed and discussed. The first one integrates natural gas reforming technology for efficiency improvement with an oxy-fuel combined power system (OXYF-REF), with water as the main work fluid. The reforming heat is obtained from the available turbine exhaust heat, and the produced syngas is used as fuel wit...

Constructal design is used to study heat removal from a square heated body with a tree shaped high thermal conductivity pathways embedded in the body. The objective is to minimize the defined maximum dimensionless temperature difference for the body. The thermal conductivity of the body is low, and there is a uniform heat generation on it. The volume of the body is fixed. The amount of high con...

Wind energy is used to rotate a magnetic turbine in order to remove heat from the surface of a photovoltaic (PV) panel. A three-bladed turbine, which rotates with wind energy, has rotational motion underneath the studied PV panel in order to move Magnetic Nano-Particles (MNPs). In addition, effects of the magnetic field strength (B=450-830 mT), rotational velocity of the magnetic turbine (ω), a...

This paper discusses the use of MEMS-type devices for the cooling of microprocessors. Vapor compression refrigerators and circulated-coolant heat-exchange systems are analyzed. Water and commercial refrigerants are considered as working fluids. Calculations indicate that although vapor compression systems are capable of removing greater amounts of heat, circulated-coolant systems are far more p...

A new micro heat spreader (MHS) concept for efŽ cient transport of large, concentrated heat loads is introduced. The MHS is a single-phase, closed micro uidic system, which utilizes reciprocating ̄ow forced convection. This micro uidic device has the potential to control transient heat loads by active control strategies. Hence, it can be utilized in various thermal management applications, mai...

The use of titanium and its alloys has increased in various industries recently, because of their superior properties of these alloys. Titanium alloys are generally classified as difficult to machine materials because of their thermo-mechanical properties such as high strength-to-weight ratio and low thermal conductivity. Laser Assisted Machining (LAM) improves the machinability of high strengt...

Escherichia coli small heat shock proteins IbpA and IbpB are molecular chaperones that bind denatured proteins and facilitate their subsequent refolding by the ATP-dependent chaperones DnaK/DnaJ/GrpE and ClpB. In vivo, the lack of IbpA and IbpB proteins results in increased protein aggregation under severe heat stress or delayed removal of aggregated proteins at recovery temperatures. In this r...

background; various industries produce and discharge wastes containing different heavy metals into the environment. apart from using living biomass, dead and dried biomasses have been introduced as a new field of biotreatment technology. method; the cadmium (cd) (ii) removal characteristics of live (growing), dead (autoclaved), and oven-dried biomasses of aspergillus versicolor were examined as...