(Daily Question) Coal-to-Oil and Olefins Forum, 2018.2.14
Thread Content
This post was last edited by Northwest Solitary Goose on 2018-2-16 at 20:28. 3.jpg Participants: Prize of 5 Wealth； Correct answer: Reward of 10 wealth points ； Note: This post is valid for 48 hours. Question: (DMTO) Olefin Separation Unit: What is the cold start of a turbine? The cold start of a turbine refers to the process by which the turbine gradually transitions from a stationary, normal-temperature state to its normal operating condition. The cold start of a turbine unit is the most complex and comprehensive process in operation. The turbine must go through all kinds of changes: from rest to its rated speed, from room temperature to high temperatures, from no load to rated load, from low flow rates to rated flow rates, and from low pressure to high pressure. During this process, the various components are subjected to changes in temperature, acceleration, and force! Note: The answers will be released automatically in two days!
It means that the steam engine has not been started for a long time, at least not for a day; in such cases, it becomes a bit harder to start it again, especially during the cold winter months. Hot start refers to the situation where the turbine has just been started not long ago, usually within 10 hours; the cylinder is still warm, which makes it easier to start it again.
Based on the level of metal temperature before the turbine is started, it can be further divided into cold start and hot start. Generally, when maintaining the turbine at idle during its cold start, the two types of startup are distinguished by the temperature level of the cylinder at the regulating stage chamber (around 150°C). If the temperature of the turbine metal is below this value at startup, it is called a cold start; if it is above this value, it is called a hot start.
The cold start of a turbine refers to a situation where the turbine has not been started for a long time, at least one day. In such cases, it becomes slightly more difficult to start it again, especially during the cold winter months. Hot start refers to the situation where the turbine has just been started not long ago, usually within 10 hours; the cylinder is still warm, which makes it easier to start it again.
Based on the level of metal temperature before the turbine is started, it can be further divided into cold start and hot start. Generally, when maintaining the turbine at idle during its cold start, the two types of startup are distinguished by the temperature level of the cylinder at the regulating stage chamber (around 150°C). If the temperature of the turbine metal is below this value at startup, it is called a cold start; if it is above this value, it is called a hot start.
Based on the level of metal temperature before the turbine is started, it can be further divided into cold start and hot start. Generally, when maintaining the turbine at idle during its cold start, the two types of startup are distinguished by the temperature level of the cylinder at the regulating stage chamber (around 150°C). If the temperature of the turbine metal is below this value at startup, it is called a cold start; if it is above this value, it is called a hot start.
Before startup, a cold start is defined as a situation in which the metal temperature at the regulating stage of the turbine’s lower cylinder is below 180°C
It means that the steam engine has not been started for a long time, at least not for a day; in such cases, it becomes a bit harder to start it again, especially during the cold winter months. Hot start refers to the situation where the turbine has just been started not long ago, usually within 10 hours; the cylinder is still warm, which makes it easier to start it again.
The cold state refers to a condition in which, with no power applied, the temperature difference between an electrical appliance or its components and the temperature of the surrounding air is no more than 3°C. Cold start is the first or initial startup of machines, equipment, instruments, etc., at ambient temperature.
Based on the level of metal temperature before the turbine is started, it can be further divided into cold start and hot start. Generally, when maintaining the turbine at idle during its cold start, the two types of startup are distinguished by the temperature level of the cylinder at the regulating stage chamber (around 150°C). If the temperature of the turbine metal is below this value at startup, it is called a cold start; if it is above this value, it is called a hot start.
Based on the level of metal temperature before the turbine is started, it can be further divided into cold start and hot start. Generally, when maintaining the turbine at idle during its cold start, the two types of startup are distinguished by the temperature level of the cylinder at the regulating stage chamber (around 150°C). If the temperature of the turbine metal is below this value at startup, it is called a cold start; if it is above this value, it is called a hot start.