What is claimed is:
1. An information handling system, comprising:
a housing having first and second sides;
a light source for emitting light for indicating a status of said information handling system, said light source being positioned within said housing;
a combined lens adjacent said light source, said combined lens having:
a first luminescent surface and a first concave surface for conducting light emitted from said light source to said first luminescent surface, such that light is emitted from said first luminescent surface in a first direction when said light source is activated, wherein light emitted from said first luminescent surface is visible from said first side of said housing; and;
a second luminescent surface and a second concave surface for conducting light emitted from said light source to said second luminescent surface, such that light is emitted from said second luminescent surface in a second direction when said light source is activated, wherein light emitted from said second luminescent surface is visible from said second side of said housing.
2. A combined lens for use with a light source, said combined lens comprising:
a first luminescent surface and a first concave surface for conducting light emitted from the light source to said first luminescent surface, such that light is emitted from said first luminescent surface in a first direction when the light source is activated; and;
a second luminescent surface and a second concave surface for conducting light emitted from the light source to said second luminescent surface, such that light is emitted from said second luminescent surface in a second direction when the light source is activated.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A gas turbine for a gas and steam turbine plant comprising a cooling system for cooling inlet air taken from compressor extractions or compressor discharge and introduced to the turbine(s) andor combustor(s) of the gas turbine which is adapted for flexible operation in a combined cycle application as well as a simple cycle application, wherein the cooling system includes at least a watersteam cooled cooling air cooler for use in a normal combined cycle application, wherein the gas turbine is provided with at least one second cooling air system arranged in a bypass which is operable instead of or parallel to the watersteam cooled cooling air cooler for use in particular in a simple cycle application operation of the gas turbine.
2. The gas turbine according to claim 1, further comprising means are provided for completely shutting off the watersteam cooled cooling air cooler of the cooling system when said second cooling air system is operated.
3. The gas turbine according to claim 1, wherein the gas turbine is adapted to being operable without a watersteam cycle being built up.
4. The gas turbine according to claim 1, further comprising a control device for automatically switching between said watersteam cooled cooling air cooler and said second cooling air system is provided, in which data concerning the turbine inlet temperature, operation mode settings, compressor inlet guide vane(s), lifetime counter for different operation modes is stored.
5. The gas turbine according to claim 1, wherein said second cooling air system is realized in form of either a quench cooler, an air to air cooler, a once through cooler with a dump condenser connected to a heat recovery steam generator and a gas turbine exhaust system, or a combination therefrom.
6. The gas turbine according to claim 1, further comprising a flow division with valves and blind flanges for an installation of said watersteam cooled cooling air cooler is provided.
7. The gas turbine according to claim 1, further comprising a switching device is provided for switching said cooling system from said watersteam cooled cooling air cooler to said second cooling air system and vice versa depending on the construction phase of the gas turbine andor the operation modus.
8. A method for operating a gas turbine for a gas and steam turbine plant having a cooling system for cooling inlet air taken from compressor extractions or compressor discharge and introduced to the turbine(s) andor combustor(s) of the gas turbine which is adapted for flexible operation in a combined cycle application as well as a simple cycle application, wherein the cooling system includes at least a watersteam cooled cooling air cooler for use in a normal combined cycle application, the method comprising:
a.) switching the operation of the gas turbine to at least one second cooling air system arranged in a bypass which is operable instead of or parallel to the watersteam cooled cooling air cooler in case of the requirement of a simple cycle application operation of the gas turbine or in case of a construction phase in which a watersteam cycle is not yet completed or installed; and
b.) automatically switching in case of step a.) the operation modus of the gas turbine to another gas turbine operation concept adapted to said at least one second cooling air system andor settings concerning a simple cycle operation modus.
9. The method according to claim 8, further comprising operating the gas turbine at different settings regarding in particular the turbine inlet temperature(s), the compressor inlet guide vane(s), the lifetime counter in a simple cycle operation modus as compared to a combined cycle operation modus.
10. The method according to claim 8, further comprising opening said bypass and completely shutting off said watersteam cooled cooling air cooler in step a.).