Heat exchangers are the most important equipment in refrigeration processes. Design and modeling of heat exchangers operating at low temperatures are different from other regular heat exchangers. This study includes two sections. In the first section, design and modeling considerations needed for evaluating the real thermal behavior of heat exchangers at low temperatures were discussed. The...

I, Bedok South Road, Singapore 1646 This study attempts to qualitatively quanti:(y the thermal design aspects of the suction tube of a hermetic refrigeration compressor with high shell pressure configuration. The effects on heat transfer and fluid flow which affect the design dimensions and material selection of the suction tube will be shown and discussed. Results obtained suggested that the t...

A common mechanism for intracellular transport is the controlled shape transformation, also known as pearling, of membrane tubes. Exploring how tube pearling takes place is thus of quite importance to not only understand the bio-functions of tubes, but also promote their potential biomedical applications. While the pearling mechanism of one single tube is well understood, both the pathway and t...

Tubal pregnancies are common but presence of hydatidiform mole in tube is a rare entity. A woman of 53years presented with acute abdomen, preoperative pregnancy test was positive and ultrasonography suspected the case as hydatidiform mole in right tube. The patient was treated with total abdominal hysterectomy with bilateral salpingo-oophorectomy as her family was completed. Subsequent histopat...

The benefits of enteral feeding in critically ill animals have been clearly established and include preservation of the mucosal integrity of the gut, reduction in rates of sepsis and augmentation of the host immune defense mechanisms. A multitude of tube types and techniques for tube insertion have been reported but fundamentally speaking, the decision for the type of enteral feeding required c...

INTRODUCTION The exposed section of a traditional nasogastric (NG) tube can interfere with patients' social activities and thereby result in distress. This study was conducted to evaluate the feasibility and safety of a novel two-piece NG tube for patients with dysphagia. METHODS Ten patients with dysphagia were recruited between November 2011 and May 2012. Patients who were unconscious or in...

The world is looking towards producing products which consume less power without compromising on quality of life. The increase in use of refrigeration and air conditioning appliances are contributing to global warming. The world wide temperatures are shooting up at an increasing rate. This paper presents a design of roll bond evaporator as the heat exchanger to provide cooling in room air condi...

The flow behavior around a cam shaped tube in cross flow has been investigated experimentally using flow visualization and pressure distribution measurement. The range of attack angle and Reynolds number based on an equivalent circular diameter are within 0 ≤ α ≤ 360˚ and 2 x 104 < Reeq < 3.4 x 104, respectively. The pressure drag features are clarified in relation to the flow behavior around t...