Techshore Inspection Services -Kochi-Kerala | Vapour Compression Refrigeration System

Techshore Inspection Services -Kochi-Kerala | Vapour Compression Refrigeration System

Mechanical Engineering, Mechanical Engineering, Uncategorized
Techshore Inspection Services -Kochi-Kerala | Vapour Compression Notes Introduction Vapor compression refrigeration cycle is the basic working cycle of a refrigeration system. The vapor-compression refrigeration system uses a circulating medium called refrigerant is the medium which absorbs heat from the space to be cooled and subsequently rejects that heat from the room to outside. Figure describes a typical, single-stage vapor-compression refrigeration system. It have primarily four components: compressor, condenser, thermal expansion valve (also called a throttle valve), and evaporator. Circulating refrigerant enters the compressor in the saturated vapor state and is compressed to a higher pressure, higher temperature vapor. The high temperature, high pressure vapor is then in the superheated vapor and it is at a temperature and pressure at which it can be condensed with cooling water or cooling air flowing across the condenser coil…
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Techshore : Flow

Techshore : Flow

Civil Engineering, Civil Engineering
Introduction Measurement of flow rate and quantity is the oldest of all measurement of process variable in the field of instrumentation. It is made for determining the proportions and quantity of materials flowing in and out of a process. These values are necessary for plant material balancing, quality control, operation of the process and for cost accounting. But flow is the most difficult parameter to measure. In process pressure level temperature are controlled by controlling the flow itself. Flow measurements are made for gases, liquids and solids. Definition: The displacement of any volumetric quantity of fluids from higher potential to lower potential in a particular time period is called flow. Units of flow: gallion/min, litre/hour, tons/hour, pound/minute, kg/sec, cubic foot/hour. Physical Properties Of Flowing Fluids. DENSITY All substances have density.…
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Techshore : Procedure Of Liquid Penetrant Test

Civil Engineering, Civil Engineering, Uncategorized
Introduction Preparing the metal surface This step determines the effectiveness in getting the final result of defects. the surface of the metal to be inspected may contain a lot of impurities such as oil ,water, grease, dust and many other impurities that prevents the penetrant which is applied onto the surface in the coming step. These impurities may prevent the penetrant to get into any defects .so usually the metal surface is cleaned off by using a liquid called as solvent. The solvent is usually available in pressurized spray can which is to be sprayed at an angle of 45 degrees keeping a one feet distance from the metal surface, hence the diluted impurities are cleaned off using a lint free towel in a single direction. Application of penetrant The…
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Techshore : Stress – Strain curve for ductile materials

Techshore : Stress – Strain curve for ductile materials

Civil Engineering, Civil Engineering
Ductile materials Ductile materials, in which includes structural steel and alloys of other metals, are regarded as their ability to yield at normal temperatures. Refer to the Fig.1&2, illustrates the stress-strain relationship and pointed out the deformation of material under stress and regions. The different regions in the curve are, Ultimate strength Yield strength or yield point Rupture Strain hardening region Necking region Apparent stress Actual stress Low carbon steel generally demonstrates a very linear stress–strain relationship up to yield point. The linear portion of the curve is the elastic region and the slope is called the Young’s Modulus or modulus of elasticity. Young's Modulus is defined as the ratio between the compressive stress and longitudinal strain. After the yield point, the curve typically decreases slightly because of dislocations escaping from Cottrell atmospheres. As deformation…
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Techshore : Split Air Conditioning System

Techshore : Split Air Conditioning System

Mechanical Engineering, Mechanical Engineering
Air Conditioning Introduction Air conditioning is the process of altering the properties if air (primarily temperature, pressure and humidity) to more favorable condition.The control of these above conditions should be desirable to maintain the health and comfort of the residents, or to meet the requirements of industrial process irrespective of the external climatic conditions. The split air conditioner The split air conditioner comprises of two parts: the outdoor unit and indoor unit. The outdoor unit, fitted outside the room, houses components like the compressor, condenser and expansion valve. The indoor unit comprises the cooling coil or evaporator and the cooling fan. For this unit no need to make any slot in the wall of the room. Further, the present day split units have artistic looks and add to the prettiness…
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Techshore : Oil And Gas Storage

Techshore : Oil And Gas Storage

Mechanical Engineering, Mechanical Engineering
INTRODUCTION On most of the production units, oil and gas are directly piped to a refinery or tank terminal. It is difficult to store gas locally, but in certain cases underground mines, caverns or salt deposits can be used to store gas. On production units without a pipeline, oil is stored in onboard storage tanks to be transported by shuttle tanker. The oil is stored in storage cells above the shafts on concrete platforms, and in tanks on floating units. On some floaters, a separate storage tanker is used. To balance the buoyancy in both cases when the oil volume varies, the usage of ballast handling is very important. For onshore, fixed roof tanks are used for crude, floating roof for condensate. Special tank gauging systems such as pressure, level…
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Improving Circuit Breaker Maintenance Management Tasks By Applying Mobile Agent Software Technology

Improving Circuit Breaker Maintenance Management Tasks By Applying Mobile Agent Software Technology

Electrical & Electronics Engineering, Electronics & Communication Engineering
INTRODUCTION Circuit breakers play a crucial role in switching for the reasons of both the routine network operation and protection of other devices in power systems. To ensure circuit breakers are in healthy condition, periodical inspection and preventive maintenance are typically performed. The maintenance schedules and routines usually follow the recommendation of circuit breaker vendors, although the recommended schedules may be conservative.New maintenance techniques and methodologies are emerging, while the circuit breakers keep improving in their designs and functions. As an example, some new circuit breakers have embedded monitoring instruments available to measure the coil current profiles and the operation timing. The recorded information can be used to monitor the condition of breakers during each operation. In this case, it may be more appropriate to replace the time directed maintenance…
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Large Scale Power Generation Using Fuel Cell

Large Scale Power Generation Using Fuel Cell

Electrical & Electronics Engineering, Electronics & Communication Engineering
INTRODUCTION A fuel cell is an electrochemical device that converts the chemical energy of Fuel directly into electrical energy. Intermediate conversions of the fuel to thermal and mechanical energy are not required. All fuel cells consist of two electrodes (anode and cathode) and an electrolyte (usually retained in a matrix). They operate much like a battery except that the reactants (and products)are not stored, but continuously fed to the cell.Fuel cells were first invented in 1839, but the technology largely remained dormant until the late 1950s. During the 1960s, NASA used precursors to today’s fuel cell technology as power sources in spacecraft.Figure 1 shows the flows and reactions in a simple fuel cell. Unlike ordinary combustion, fuel (hydrogen-rich) and oxidant (typically air) are delivered to the fuel cell separately. The…
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Design And Development Of Microcontroller Based Mppt And Inverter For Small Power Applications

Electrical & Electronics Engineering, Electronics & Communication Engineering
INTRODUCTION In the present world of increasing demand for energy resources, it is crucial to come up with innovatory ideas to reduce and conserve usage of energy. The word Photovoltaic is a combination of the Greek word for Light and the name of the physicist Volta. It identifies the direct conversion of sunlight into energy by means of solar cells [1].Though the utilization of solar energy is little at present, it is going to double in upcoming days, even though it today this type of energy is not widely used as other available resources like thermal, wind, or hydroelectric. Solar power has many advantages over other nonrenewable energy sources. It has even advantages over renewable energy sources like wind and water. However the drawback here is that it produces energy…
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Protection Of Transmission System Using Global Positioning System

Protection Of Transmission System Using Global Positioning System

Electrical & Electronics Engineering, Electronics & Communication Engineering
INTRODUCTION An electric power system comprises of generation, transmission and distribution of electric energy. Transmission lines are used to transmit electric power to distant large load centres. The rapid growth of electric power systems over the past few decades has resulted in a large increase of the number of lines in operation and their total length. These lines are exposed to faults as a result of lightning, short circuits, faulty equipments, misoperation, human errors, overload, and aging. Many electrical faults manifest in mechanical damages, which must be repaired before returning the line to service. The restoration can be expedited if the fault location is either known or can be estimated with a reasonable accuracy. Faults cause short to long term power outages for customers and may lead to significant losses…
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