Steam and Gas Turbine Power Plants: Types and Cycles
Steam Turbines
Types of Steam Turbines
Based on Outlet Vapor Pressure
Backpressure Turbines
In backpressure turbines, the steam is extracted at a pressure above atmospheric after being used. This steam can then be utilized for industrial processes. These turbines can be further classified into:
- Simple or Single Stage: These turbines have a single stage.
- Composite Single or Multistage: These turbines consist of two or more stages.
Based on Steam Flow Direction
Axial Turbines
In axial turbines, the steam flows
Read MoreConcrete and Steel: Properties and Types
Consistency of Fresh Concrete
Many trials have been designed to estimate the workability of fresh concrete mixtures to be placed and compacted on site. This is called the consistency property of fresh concrete. Without a doubt, the most used test is the Abrams’ slump test (IRAM 1536).
Slump Test
The test uses a metal mold, cone-shaped with a 20 cm higher base, 10 cm lower base, and 30 cm in height, and a smooth round steel rod 16 mm in diameter and 60 cm long with a rounded tip. The procedure is as
Read MoreTroubleshooting and Maintenance of Computer Hardware and Software
1. A computer can access devices on the same network but cannot access devices on other networks. What is the likely cause of this problem?
– The cable is not connected to the NIC correctly.
– The computer has an invalid IP address.
– The computer has an incorrect subnet mask.
– The computer has an invalid address input.
2.
Refer to the exhibit. What is the proper order of safety steps to remove one of several hot-swappable devices?
– 2, 3, 5, 6
– 1, 3, 5, 6
– 1, 4, 5, 6
– 2, 5, 6
3. Which power
Read MorePlastics: Properties, Classification, and Manufacturing Techniques
1. Plastics: Origin and Transformation
Plastics play a prominent role in the development of various sectors. They are materials made of polymers, which consist of long chains of carbon atoms. Depending on its source, plastic can be:
- Natural Plastics: Obtained directly from plant or animal materials.
- Synthetic or Artificial Plastics: Prepared from compounds derived from petroleum, natural gas, or coal.
The industrial processing of these raw materials into plastics is called polymerization. During manufacturing,
Read MoreInstallation Requirements for Electrical Receptors up to 440V
1. Introduction
This document outlines the general installation requirements for electrical receptors operating at voltages up to 440V RMS between phases (254V RMS between phase and earth), supplied from a foreign network. These requirements are in accordance with Article 6 of the Low Voltage Electrotechnical Regulations and do not supersede the Low Voltage Directive (73/23/EEC) and the Electromagnetic Compatibility Directive (89/336/EEC). This applies even to receptors not supplied fully assembled,
Read MoreElectrical Installations in Ports and Marinas for Recreational Boats
1. Purpose and Scope
These requirements apply to electrical installations in ports and marinas that supply power to recreational boats. Vessels using these facilities must meet the requirements of applicable European Directives as provided in Article 6 of the Low Voltage Regulation. Vessels affected by Directive 94/25/CEE are excluded from this scope.
For the purpose of this instruction, a pleasure boat is defined as any floating unit used exclusively for sports and leisure, such as boats, yachts,
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