User contributions for Fredrosse
A user with 199 edits. Account created on 19 September 2006.
26 February 2024
- 20:3920:39, 26 February 2024 diff hist +1,112 User:Fredrosse Updated from 2008 Bio, added request for discussion with potential editors of my inputs. current
- 17:2217:22, 26 February 2024 diff hist +36 Thermal power station →Feed water heating: added "usually" & "typically" as several plants deviate from the normal recent configurations.
29 August 2023
- 13:4913:49, 29 August 2023 diff hist +340 Load cell Original text only refers to electrical signal type of load cell, added other common types of signal indicators (pneumatic, etc.) Added most common spring scale statement, technically a load cell, and a common historically popular form of load cell.
2 June 2023
- 20:2320:23, 2 June 2023 diff hist −2 Thermal power station →Generator cooling: Pressurizing the cooling hydrogen actually increases parasitic drag (higher density H2 = higher friction loss) thus NOT an efficiency improvement, but actually more cooling capacity.
8 August 2022
- 22:5822:58, 8 August 2022 diff hist +67 Thermal power station →Generator cooling: In the business for 50 years, large utility generatore have always been labyrinth sealed.
- 22:5322:53, 8 August 2022 diff hist +10 Thermal power station →Steam condensing: Copper bearing alloys have been outlawed (due to toxic nature) for decades in the USA and throughout the world.
- 22:4922:49, 8 August 2022 diff hist −18 Thermal power station →Steam condensing: Statement that vacuum "pulls" flow out of turbine is technically incorrect. Fundamental property in fluid flows, cannot "pull" on a fluid, fluids will not support tensile stress..
- 22:4322:43, 8 August 2022 diff hist +25 Thermal power station →Steam condensing: Corrected "low vacuum", obviously should indicate "High Vacuum" , also added absolute pressure statement for clarification
7 April 2021
- 16:1716:17, 7 April 2021 diff hist +275 Heat of combustion →Usage of terms: clarification of engine heat rates using LHV vs. HHV
- 16:1016:10, 7 April 2021 diff hist +73 Heat of combustion Only HHV is measured by Calorimeter, common engineering knowledge.
26 December 2020
- 18:1218:12, 26 December 2020 diff hist +102 Thermal power station →Generator cooling: added well known details
- 17:5517:55, 26 December 2020 diff hist +8 Thermal power station →Boiler and steam cycle: added clarification
- 17:5317:53, 26 December 2020 diff hist +48 Thermal power station →Thermal power generation efficiency: added clarification about actual wind turbines
- 17:4817:48, 26 December 2020 diff hist +11 Thermal power station →History: Added "almost all, since reciprocating units continued to a limited extent after 1905 https://www.nycsubway.org/wiki/The_Interborough_Power_Plant
- 16:3116:31, 26 December 2020 diff hist −1 Thermal power station all natural gas stations are thermal, using heat to produce power
27 November 2020
- 16:3716:37, 27 November 2020 diff hist +12 m Thermal power station →Thermal power generation efficiency: Virtually all power stations operate at supercritical temperatures, "supercritical pressure" is the proper terminology actually to define a "supercritical power plant"
- 16:1716:17, 27 November 2020 diff hist +5 m Water-tube boiler →Stirling boiler: Changed "horizontal type of boiler" to: "horizontal drum type of boiler" for clarification
24 November 2020
- 17:4617:46, 24 November 2020 diff hist +95 Prony brake No edit summary
21 November 2020
- 18:5618:56, 21 November 2020 diff hist +36 Water-tube boiler Clarified actual Baldwin 60,000 locomotive location in a museum.
- 18:4618:46, 21 November 2020 diff hist +70 Water-tube boiler Clarified reference to a solar power station having "D" type fossil fueled boilers.
- 18:4118:41, 21 November 2020 diff hist +52 Water-tube boiler Replaced incorrect statement that imply use of watertube boilers is due to their ability to produce superheated steam, simply not true.
- 18:1818:18, 21 November 2020 diff hist +532 Water-tube boiler General clarifications, added Nuclear steam generators description
23 June 2020
- 20:2520:25, 23 June 2020 diff hist +275 Cutoff (steam engine) →Explanation: The explanations previously given were simply incorrect.
- 20:0620:06, 23 June 2020 diff hist −128 Cutoff (steam engine) Removed statement that about this type engine as the only one with maximum torque at zero speed. A completely wrong statement.
- 19:4719:47, 23 June 2020 diff hist +179 m Valve gear →Corliss valve gear: Added statement about multi-valve arrangement improving engine efficiency, beyond precise control of cutoff.
- 19:3719:37, 23 June 2020 diff hist −5 m Copper units of pressure Pressure was incorrectly stated to be a "thermodynamic property", corrected to indicate Pressure as a physical property
3 February 2020
- 07:0307:03, 3 February 2020 diff hist −1 Honda CB350F Honda made many "multi-cylinder" (twin cylinder) models previous to this model, which is the smallest 4 cylinder model.
1 December 2019
- 16:3516:35, 1 December 2019 diff hist +33 m Live steam Added clarification
14 November 2019
- 06:4706:47, 14 November 2019 diff hist +393 Internal ballistics →History: elaborated on pressure measurement methods, "CUP" and "LUP" industry standards.
24 October 2019
- 06:2206:22, 24 October 2019 diff hist −1 Steamboat →Steam turbines: Changed "was" to "is" as past tense is incorrect, many turbine ships still ply the oceans
28 May 2019
- 17:3317:33, 28 May 2019 diff hist +9 Seasonal energy efficiency ratio Text incorrectly stated in the example that a 5000 BTU/hr air conditioner is 1500 Watts cooling capacity, 1465 is correct, and this conversion is correctly stated later on this page, 3412 BTU/hr = 1000 Watts
11 February 2018
- 03:3103:31, 11 February 2018 diff hist +552 The Hurt Locker →Response among veterans: added information about technical correctness in long range condition, Fiennes scene.
14 January 2018
- 16:2216:22, 14 January 2018 diff hist +168 Craven Hall →Significance: Added Fitch Steamboat Museum
- 15:5915:59, 14 January 2018 diff hist +245 Steam engine →Multiple-expansion engines: Added Liberty Ships comment, also minor edit clarifying "exhaust to atmosphere"
- 15:4715:47, 14 January 2018 diff hist +18 m Steam engine →Compound engines
- 15:4615:46, 14 January 2018 diff hist +8 Steam engine →Compound engines: In 50 years of study I have not seen increased stroke as an actual method for increasing LP volume. It could work, but actual practice it is not..
- 15:4015:40, 14 January 2018 diff hist +109 Steam engine →Compound engines: Clarified explaination of why compound engines are more efficient.
- 15:2715:27, 14 January 2018 diff hist +846 Steam engine →Simple engine: Clarified efficiency loss statements. "long stroke" is actually not the real technical issue here.
21 November 2017
- 01:3801:38, 21 November 2017 diff hist +24 Robert Fulton →Work: Revised - Fitch is first commercial steamboat operation, Fulton is first successful commercial steamboat
13 November 2017
- 16:4816:48, 13 November 2017 diff hist +65 Steamboat →Images
- 16:3316:33, 13 November 2017 diff hist +181 Steamboat →20th century: Added comment, 2708 total Liberty ships built, and stated reason steam turbines not used for Liberty ships
- 16:2616:26, 13 November 2017 diff hist +19 Steamboat →United States
- 16:2516:25, 13 November 2017 diff hist +98 Steamboat →United States: Added Fitch as first regular scheduled commercial marine transport using steam propulsion.
- 16:2116:21, 13 November 2017 diff hist +31 Steam engine →Efficiency: Clarifications, engine efficiency (typically over 50%), also named "expander efficiency", vs. overall power cycle efficiency (typically never over 50%), far different definitions
- 16:1516:15, 13 November 2017 diff hist +20 Steam engine →Efficiency: Steam cycle efficiency is far lower, and different from the "engine efficiency" or "expander efficiency", engineering terms which are typically well above 50%.
- 16:0416:04, 13 November 2017 diff hist −1 Steam engine →Reciprocating piston: A counterflow engine has steam flow in/out of the same end of the cylinder, but not necessarily the same admission / exhaust port
6 February 2017
- 18:3218:32, 6 February 2017 diff hist +134 Steam engine →Simple engine: clarification, many readers thought "only one cylinder." implied that a simple engine had to be a single cylinder engine.
- 18:2818:28, 6 February 2017 diff hist +32 Steam engine Statement that exhaust steam is "condensed and returned to the boiler" is only partial method, virtually all steam locomotives exhaust to atmosphere.
- 18:2018:20, 6 February 2017 diff hist +7 Marine steam engine →Vertical, horizontal, inclined, inverted: Clarified definition, previous description relied on the reader's opinion as to the meaning of "upside down"
- 16:4816:48, 6 February 2017 diff hist +40 Naphtha launch Some clarifications to text, statements were not technically correct in the strict sense, now they are.
