1.1 GENERAL As in any application there is fluctuation in heat load, this fluctuation affects optimal values of efficiency which causes decrement in system's overall efficiency. 1.2 HISTORY AND BACKGROUND Heat exchangers are equipments that ease the exchange heat between two fluids which are at different temperatures while keeping them apart from mixing with each other. Heat exchangers in their purest sense have been around for as long as man has been cooking in pots and ovens. To understand this
ABSTRACT A Heat Exchanger is a device use for the heat transfer from one fluid to another, whether the fluids are separated by a solid wall so that they never mix or the fluids are directly in contact. The heat exchanger is widely used in different industries such as process, petroleum refining, chemicals and paper, power generation, chemical processing, A.C, refrigeration, and a food processing applications. Etc. Various Enhancement methods are used to increase performance of heat exchanger such as
analysis on heat pump. (J. U. Ahamed, 2011) It showed in study on prospect of hydrocarbon based on exergy analysis in vap... ... middle of paper ... ... air pumping device (such as blower or axial flow fan) is across the tube bundle which may be either forced draft or induced draft as shown in the Figure 2.2. A support structure that high enough to allow air to enter beneath the air cooled heat exchanger. 2.4.3 Shell and tube heat exchanger Figure 2.3 Shell and tube heat exchanger From the Figure
performance of a heat exchanger depends upon various parameters like inlet temperature of a hot fluid, type of hot fluid, type of cold fluid, shape of baffles, material of baffles, baffles angle and property of ribs. Basically fluid flow and heat transfer characteristics are largely depends upon the Reynolds number (Re). Reynolds number is basically the ratio of inertia force to viscous force. Re is only the factor by which we can decide whether the fluid is laminar or turbulent in shell and tube type of
Introduction: 2.1. Heat transfer: Heat transfer is the science that pursues to foresee the energy transfer that may take place among material bodies as an outcome of a temperature difference. Thermodynamics explains that this energy transfer is described as heat. The science of heat transfer pursues not only to explain how heat energy may be transfer, but also to foresee the rate at which the exchange will take place under certain quantified conditions. The fact that a heat-transfer rate is the
Cleaning is an important process in any production, especially in food and beverage industry. This is due to it have to keep the standard regulated by the Food and Drugs Administration (FDA) to make sure that the food from the production is safe to be consumed by the consumers and less case of poisoning occurs. In beer production, the cleaning process involved in maintaining a hygienic level of the equipment of the brewing process, especially the tank or vessel that is used during the fermentation
Chapter 1 Introduction Conventional refrigeration systems use Chlorofluorocarbons (CFCs) and Hydro Chlorofluorocarbons (HCFCs) as heat carrier fluids. Use of such fluids in conventional refrigeration systems has a great concern of environmental degradation and resulted in extensive research into development of novel refrigeration technologies. The current tendency of the world is to look at renewable energy resources as a source of energy. This is done for the following two reasons; firstly
work’. The origin of fire, heat and light is energy. It’s required to grow food grains which enable humans and animals to survive and work. The sun is the primary source of energy. The sun, which
be crudely represented by the following reactions: 2C3S + 6H = C3S2H3 + 3CH 2C2S + 4H = C3S2H3 + CH During the initial stage of hydration, the parent compounds dissolve, and the dissolution of their chemical bonds generates a significant amount of heat. Then, for reasons that are not fully understood, hydration comes to a stop. This quiescent, or dormant, period is extremely important in the placement of concrete. Without a dormant period there would be no cement trucks, pouring would have to be
column will run at a vapor velocity of 4.85 ft/hr and will have a HETP of 4.30 inches. This will result in a packing height of 38.7 feet. The reboiler will have an area of 113.52 ft2 and the area of the condenser will have a value of 45.54 ft2 in which heat exchange will take place. Introduction A chemical plant spends approximately 50 to 90% of capital investment on separation equipment (1,1) Therefore, the ability to utilize a small laboratory column and to scale-up a column is an important skill