Environmental Control System (CSM) - Revision history

imported>Tschachim: Procedure fixed

2006-12-19T23:56:08Z

Procedure fixed

← Older revision		Revision as of 23:56, 19 December 2006
Line 48:		Line 48:

	== Primary water-glycol coolant loop manual control ==		== Primary water-glycol coolant loop manual control ==

	~~{{Attention \| message=Because of the work-in-progress of the ECS this procedure is not working at the moment.}}~~

	In the previous procedure we changed the amount of heat the primary water-glycol coolant loop had to remove, the radiators and the evaporator were controlled automatically by the ECS with respect to the amount of thermal energy they had to remove from the coolant. But you also can control both systems manually in case the automatic control fails (but this is not possible at the moment) or you want a different behavior of these systems:		In the previous procedure we changed the amount of heat the primary water-glycol coolant loop had to remove, the radiators and the evaporator were controlled automatically by the ECS with respect to the amount of thermal energy they had to remove from the coolant. But you also can control both systems manually in case the automatic control fails (but this is not possible at the moment) or you want a different behavior of these systems:

	* ~~Set~~ the ~~HIGH GAIN ANTENNA PITCH POSITION switch to 0° to enable medium heating and wait a few minutes until~~ the ECS ~~is in a stable condition again~~.		* Make sure that no test heat is applied to the primary water-glycol coolant loop by using the ECS screen of the [[ProjectApolloMFD]]. Total heating should be about 2400 W.

	* The radiators are sufficient to remove all the heat, the ECS RAD TEMP INLET meter indicates a temperature of about 70 °F to 80 °F, the ECS RAD TEMP PRIM OUTLET meter shows about 20 °F to 40 °F. The evaporator is not necessary, the GLY EVAP TEMP OUTLET meter shows about 45 °F, the GLY EVAP STEAM PRESS meter is again a little bit under 0.15 psi indicating that the steam pressure control valve is closed.		* The radiators are sufficient to remove all the heat, the ECS RAD TEMP INLET meter indicates a temperature of about 70 °F to 80 °F, the ECS RAD TEMP PRIM OUTLET meter shows about 20 °F to 40 °F. The evaporator is not necessary, the GLY EVAP TEMP OUTLET meter shows about 45 °F, the GLY EVAP STEAM PRESS meter is again a little bit under 0.15 psi indicating that the steam pressure control valve is closed.

imported>Tschachim: /* Cooling with the primary water-glycol coolant loop */

2006-12-19T23:42:29Z

Cooling with the primary water-glycol coolant loop

← Older revision		Revision as of 23:42, 19 December 2006
Line 27:		Line 27:
	== Cooling with the primary water-glycol coolant loop ==		== Cooling with the primary water-glycol coolant loop ==

	The primary and secondary water-glycol cooling systems are used to control the suit and cabin temperature. The ~~suit is heated by the crew at about 10 W per crew member. Additionally the~~ primary water-glycol cooling system has to cool the IMU and the two BMAGs, which provide 800 W of heating each.		The primary and secondary water-glycol cooling systems are used to control the suit and cabin temperature and to cool some of the devices. The primary water-glycol cooling system has to cool the IMU and the two BMAGs, which provide 800 W of heating each. Additionally the suit is heated by the crew at about 10 W per crew member.

	To test and play with the primary and secondary water-glycol coolant loop you can use the [[ProjectApolloMFD]] in order to heat or cool the coolant loops manually. You can add or remove 3000 W of heating to or from each loop. With the following procedure you can discover the behavior of the primary water-glycol coolant loop during various heat loads:		To test and play with the primary and secondary water-glycol coolant loop you can use the [[ProjectApolloMFD]] in order to heat or cool the coolant loops manually. You can add or remove 3000 W of heating to or from each loop. With the following procedure you can discover the behavior of the primary water-glycol coolant loop during various heat loads:

imported>Tschachim: Procedure fixed

2006-12-19T18:19:07Z

Procedure fixed

← Older revision		Revision as of 18:19, 19 December 2006
Line 27:		Line 27:
	== Cooling with the primary water-glycol coolant loop ==		== Cooling with the primary water-glycol coolant loop ==

	~~{{Attention \| message=Because of the work-in~~-~~progress of~~ the ~~ECS this procedure~~ is ~~not working~~ at the ~~moment~~.}}		The primary and secondary water-glycol cooling systems are used to control the suit and cabin temperature. The suit is heated by the crew at about 10 W per crew member. Additionally the primary water-glycol cooling system has to cool the IMU and the two BMAGs, which provide 800 W of heating each.

	~~At the moment~~ the primary and secondary water-glycol ~~cooling systems are only used~~ to ~~control~~ the ~~suit and cabin temperature~~. ~~The suit is heated by the crew at about 10~~ W ~~per crew member. In reality the cooling system also has~~ to ~~cool all the electrical devices like the IMU~~ or ~~the BMAGs and so has to remove much more heat~~ from the ~~CSM. But~~ the ~~heating~~ of ~~these devices is not simulated at~~ the ~~moment, so the cooling systems are running quite idle in the initial state, all temperatures are very low.~~		To test and play with the primary and secondary water-glycol coolant loop you can use the [[ProjectApolloMFD]] in order to heat or cool the coolant loops manually. You can add or remove 3000 W of heating to or from each loop. With the following procedure you can discover the behavior of the primary water-glycol coolant loop during various heat loads:

	~~To test~~ and ~~play with~~ the ~~primary water-glycol coolant loop you can use~~ the ~~HIGH GAIN ANTENNA PITCH POSITION switch~~ to ~~heat~~ the coolant ~~loop with a boiler~~. ~~Of course this is not the realistic functionality of this of switch, but that way you can watch the behavior of the cooling system during different heat loads. If~~ the ~~HIGH GAIN ANTENNA PITCH POSITION switch is set to +90° (up) there's no additional~~ heating~~, each position adds 800 W of heating power, so in the -90° position~~ (~~down) the coolant loop is heated with a~~ heating ~~power of 4800 W, which~~ is about ~~the maximum heat the primary loop can deal with.~~		* Open the [[ProjectApolloMFD]] and click on the ECS. The ECS screen appears showing the current heating power applied to the two coolant loops. Press PRM and enter "-2400" to almost disable the heating (total heating is about 0W) of the primary loop, set the ECS INDICATORS switch to PRIM to make sure you're monitoring the primary loop and use time acceleration between 10 to 100 and wait until the ECS meters are in a stable condition.

	~~With the following procedure you can discover the behavior~~ of the primary ~~water-glycol coolant~~ loop ~~during various heat loads:~~

	* Set the HIGH GAIN ANTENNA PITCH POSITION switch to +90° to disable the heating, set the ECS INDICATORS switch to PRIM to make sure you're monitoring the primary loop and use time acceleration between 10 to 100 and wait until the ECS meters are in a stable condition.

	* The ECS RAD TEMP INLET meter indicates a temperature lower than 60 °F, the ECS RAD TEMP PRIM OUTLET meter shows about -10 °F maintained by the primary ECS radiators heater. The GLY EVAP TEMP OUTLET meter shows ca. 45 °F, the GLY EVAP STEAM PRESS meter is a little bit under 0.15 psi indicating that the evaporator steam pressure control valve is closed. Because the primary coolant loop has only to remove the small heat load caused by the crew the evaporator is not evaporating and the radiators have only a small amount of thermal energy to radiate, the outlet has to be heated to maintain the minimum temperature. If you switch the ECS RADIATORS HEATER PRIM switch to OFF (center) you can see the outlet temperature drop down. You get a GLYCOL TEMP LOW alarm, push the MASTER ALARM pushbutton/light to turn off the alarm. Switch the ECS RADIATORS HEATER PRIM switch to PRIM 1 (up) again, the GLYCOL TEMP LOW alarm goes away.		* The ECS RAD TEMP INLET meter indicates a temperature lower than 60 °F, the ECS RAD TEMP PRIM OUTLET meter shows about -10 °F maintained by the primary ECS radiators heater. The GLY EVAP TEMP OUTLET meter shows ca. 45 °F, the GLY EVAP STEAM PRESS meter is a little bit under 0.15 psi indicating that the evaporator steam pressure control valve is closed. Because the primary coolant loop has only to remove the small heat load caused by the crew the evaporator is not evaporating and the radiators have only a small amount of thermal energy to radiate, the outlet has to be heated to maintain the minimum temperature. If you switch the ECS RADIATORS HEATER PRIM switch to OFF (center) you can see the outlet temperature drop down. You get a GLYCOL TEMP LOW alarm, push the MASTER ALARM pushbutton/light to turn off the alarm. Switch the ECS RADIATORS HEATER PRIM switch to PRIM 1 (up) again, the GLYCOL TEMP LOW alarm goes away.

	* ~~Set the HIGH GAIN ANTENNA PITCH POSITION switch to 0°~~ to enable medium heating and wait a few minutes until the ECS meters are in a stable condition again.		* Press PRM again and enter "0" to enable normal, medium heating again and wait a few minutes until the ECS meters are in a stable condition again.

	* The ECS RAD TEMP INLET meter indicates now a temperature of about 70 °F to 80 °F, the ECS RAD TEMP PRIM OUTLET meter shows about 20 °F to 40 °F. The GLY EVAP TEMP OUTLET meter shows still about 45 °F, the GLY EVAP STEAM PRESS meter is still a little bit under 0.15 psi indicating that the evaporator is still not necessary. All the thermal energy is now removed and radiated to the space by the ECS radiators, as indicated by the higher radiator outlet temperature.		* The ECS RAD TEMP INLET meter indicates now a temperature of about 70 °F to 80 °F, the ECS RAD TEMP PRIM OUTLET meter shows about 20 °F to 40 °F. The GLY EVAP TEMP OUTLET meter shows still about 45 °F, the GLY EVAP STEAM PRESS meter is still a little bit under 0.15 psi indicating that the evaporator is still not necessary. All the thermal energy is now removed and radiated to the space by the ECS radiators, as indicated by the higher radiator outlet temperature.

	* ~~Set the HIGH GAIN ANTENNA PITCH POSITION switch to -60°~~ to enable a huge amount of heat and wait a few minutes until the ECS meters are in a stable condition again.		* Press PRM again and enter "1500" to enable a huge amount of heat and wait a few minutes until the ECS meters are in a stable condition again.

	* The ECS RAD TEMP INLET meter indicates now a temperature of about 90 °F, the ECS RAD TEMP PRIM OUTLET meter shows about 50 °F. Now the radiators are no longer capable removing all the thermal energy from the water-glycol coolant and the evaporator mode of cooling is initiated. The GLY EVAP TEMP OUTLET meter shows about 40 °F, the GLY EVAP STEAM PRESS meter is about 0.12 psi. That means that the steam pressure control valve is now partially open and the evaporator removes the remaining thermal energy by evaporating waste water to the space.		* The ECS RAD TEMP INLET meter indicates now a temperature of about 100 °F, the ECS RAD TEMP PRIM OUTLET meter shows about 50 °F. Now the radiators are no longer capable removing all the thermal energy from the water-glycol coolant and the evaporator mode of cooling is initiated. The GLY EVAP TEMP OUTLET meter shows about 40 °F, the GLY EVAP STEAM PRESS meter is about 0.12 psi. That means that the steam pressure control valve is now partially open and the evaporator removes the remaining thermal energy by evaporating waste water to the space.

	* ~~Set the HIGH GAIN ANTENNA PITCH POSITION switch to -90°~~ to enable maximum heating. Wait a few minutes and you will notice that the GLY EVAP STEAM PRESS meter is further decreasing. Wait and see if the evaporator (together with the still operating radiators) can remove all this heat from the coolant...		* Press PRM again and enter "3000" to enable maximum heating. Wait a few minutes and you will notice that the GLY EVAP STEAM PRESS meter is further decreasing. Wait and see if and how long the evaporator (together with the still operating radiators) can remove all this heat from the coolant. Also monitor the waste water quantiy, the evaporator uses that for cooling and when all the water is consumed the evaporator will fail.

	* ~~Set the HIGH GAIN ANTENNA PITCH POSITION switch back to 0°~~ to enable medium heating again. The temperatures will go back to normal readings.		* Press PRM again and enter "0" to enable normal, medium heating again. The temperatures will go back to normal readings.

	== Primary water-glycol coolant loop manual control ==		== Primary water-glycol coolant loop manual control ==

imported>Tschachim: Printing improved

2006-12-18T22:51:00Z

Printing improved

← Older revision		Revision as of 22:51, 18 December 2006
Line 1:		Line 1:
	[[Image:CSMECSDiagram.png\|thumb\|right\|CSM Environmental Control System]]		[[Image:CSMECSDiagram.png\|thumb\|right\|CSM Environmental Control System]]

	This section provides step-by-step examples and instructions how to use the '''Environmental Control System (ECS)'''. Hopefully this will help users to get a better understanding and feeling how to ~~work with~~ the spacecraft systems. In ~~these~~ procedures it is assumed that the spacecraft is in a "stable condition" without flying manoeuvers with ECS in "flight configuration", for example during Trans Lunar Coast and you can use time acceleration up to 1000 so that all of the internal systems have reasonable reaction times.		This section provides step-by-step examples and instructions how to use the '''Environmental Control System (ECS)'''. Hopefully this will help users to get a better understanding and feeling how to use the spacecraft systems. In the following procedures it is assumed that the spacecraft is in a "stable condition" without flying manoeuvers with ECS in "flight configuration", for example during Trans Lunar Coast and you can use time acceleration up to 1000 to assure that all of the internal systems have reasonable reaction times.

	== ECS monitoring check ==		== ECS monitoring check ==
Line 7:		Line 7:
	This is the part of the original Apollo documentation<cite>ASTP_AOH2</cite> used for regular checking the most important ECS components.		This is the part of the original Apollo documentation<cite>ASTP_AOH2</cite> used for regular checking the most important ECS components.

	[[Image:~~CSM_ECS_monitoring_check~~.gif]]		[[Image:CSM_ECS_monitoring_check1.gif]]

			[[Image:CSM_ECS_monitoring_check2.gif]]

	== Suit compressor shutdown and restart ==		== Suit compressor shutdown and restart ==
Line 13:		Line 15:
	During normal operations suit compressor 1 is turned on in order to drive the suit atmosphere regeneration systems, which remove CO<sub>2</sub>, water and other unwanted substances. Suit compressor 2 is redundant and turned off. The following procedure demonstrates the necessity of the suit compressor.		During normal operations suit compressor 1 is turned on in order to drive the suit atmosphere regeneration systems, which remove CO<sub>2</sub>, water and other unwanted substances. Suit compressor 2 is redundant and turned off. The following procedure demonstrates the necessity of the suit compressor.

	* ~~At the beginning the suit compressor should work normally so~~ the SUIT COMPRESSOR 1 switch is in AC1 position (that means on) and the SUIT COMPRESSOR 2 switch is in OFF position. The SUIT COMPR ΔP meter shows 0.3 - 0.4 psi, the PART PRESS CO<sub>2</sub> meter shows appox. 2 mmHg, which is far below the CO<sub>2</sub> PP HI value of 7.6 mmHg, so the suit compressor is working properly.		* Normally the SUIT COMPRESSOR 1 switch is in AC1 position (that means on) and the SUIT COMPRESSOR 2 switch is in OFF position. The SUIT COMPR ΔP meter shows 0.3 - 0.4 psi, the PART PRESS CO<sub>2</sub> meter shows appox. 2 mmHg, which is far below the CO<sub>2</sub> PP HI value of 7.6 mmHg, so the suit compressor is working properly.

	* Switch the SUIT COMPRESSOR 1 switch to OFF (center position). The SUIT COMPR ΔP meter drops to 0 psi within a few seconds indicating that the compressors stopped working. You get a SUIT COMPRESSOR alarm, push the MASTER ALARM pushbutton/light to turn off the alarm. The PART PRESS CO<sub>2</sub> meter begins to increase.		* Switch the SUIT COMPRESSOR 1 switch to OFF (center position). The SUIT COMPR ΔP meter drops to 0 psi within a few seconds indicating that the compressors stopped working. You get a SUIT COMPRESSOR alarm, push the MASTER ALARM pushbutton/light to turn off the alarm. The PART PRESS CO<sub>2</sub> meter begins to increase.

imported>Mark Grant: Link and system diagram.

2006-11-29T01:13:48Z

Link and system diagram.

← Older revision		Revision as of 01:13, 29 November 2006
Line 1:		Line 1:
			[[Image:CSMECSDiagram.png\|thumb\|right\|CSM Environmental Control System]]

	This section provides step-by-step examples and instructions how to use the '''Environmental Control System (ECS)'''. Hopefully this will help users to get a better understanding and feeling how to work with the spacecraft systems. In these procedures it is assumed that the spacecraft is in a "stable condition" without flying manoeuvers with ECS in "flight configuration", for example during Trans Lunar Coast and you can use time acceleration up to 1000 so that all of the internal systems have reasonable reaction times.		This section provides step-by-step examples and instructions how to use the '''Environmental Control System (ECS)'''. Hopefully this will help users to get a better understanding and feeling how to work with the spacecraft systems. In these procedures it is assumed that the spacecraft is in a "stable condition" without flying manoeuvers with ECS in "flight configuration", for example during Trans Lunar Coast and you can use time acceleration up to 1000 so that all of the internal systems have reasonable reaction times.

Line 68:		Line 70:
	#[[References]]		#[[References]]
	</biblio>		</biblio>

			==External Links==

			* [http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19720012252_1972012252.pdf Apollo experience report: Command and service module environmental control system]

	[[Category:CSM systems]]		[[Category:CSM systems]]

imported>Tschachim: CSM Environmental Control System moved to Environmental Control System (CSM)

2006-11-19T01:12:43Z

CSM Environmental Control System moved to Environmental Control System (CSM)

← Older revision	Revision as of 01:12, 19 November 2006
(No difference)

imported>Mark Grant at 16:14, 27 October 2006

2006-10-27T16:14:57Z

← Older revision		Revision as of 16:14, 27 October 2006
Line 70:		Line 70:

	[[Category:CSM systems]]		[[Category:CSM systems]]
	~~[[Category:CSM System Controls]]~~

imported>Mark Grant at 11:40, 27 October 2006

2006-10-27T11:40:19Z

← Older revision		Revision as of 11:40, 27 October 2006
Line 70:		Line 70:

	[[Category:CSM systems]]		[[Category:CSM systems]]
			[[Category:CSM System Controls]]

imported>Tschachim at 13:30, 13 October 2006

2006-10-13T13:30:44Z

← Older revision		Revision as of 13:30, 13 October 2006
Line 3:		Line 3:
	== ECS monitoring check ==		== ECS monitoring check ==

	This is the part of the original Apollo documentation used for regular checking the most important ECS components~~. These procedures are from the Apollo-Soyuz test project Operations handbook reference issue (see below)~~.		This is the part of the original Apollo documentation<cite>ASTP_AOH2</cite> used for regular checking the most important ECS components.

	[[Image:CSM_ECS_monitoring_check.gif]]		[[Image:CSM_ECS_monitoring_check.gif]]
Line 64:		Line 64:

	* Switch the GLYCOL EVAP STEAM PRESS AUTO MAN switch to AUTO, all ECS systems are back to automatic control.		* Switch the GLYCOL EVAP STEAM PRESS AUTO MAN switch to AUTO, all ECS systems are back to automatic control.

			<biblio force=false>
			#[[References]]
			</biblio>

	[[Category:CSM systems]]		[[Category:CSM systems]]

imported>Tschachim: Environmental Control System moved to CSM Environmental Control System

2006-10-13T10:16:29Z

Environmental Control System moved to CSM Environmental Control System

← Older revision	Revision as of 10:16, 13 October 2006
(No difference)