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Spacecraft Equipment Environmental Control
- Aerospace Standard
- AIR1168/13A
- Stabilized
Downloadable datasets available
Annotation ability available
Sector:
Issuing Committee:
Language:
English
Scope
This part of the manual presents methods for arriving at a solution to the problem of spacecraft inflight equipment environmental control. The temperature aspect of this problem may be defined as the maintenance of a proper balance and integration of the following thermal loads: equipment-generated, personnel-generated, and transmission through external boundary.
Achievement of such a thermal energy balance involves the investigation of three specific areas:
-
1
Establishment of design requirements.
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2
Evaluation of properties of materials.
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3
Development of analytical approach.
The solution to the problem of vehicle and/or equipment pressurization, which is the second half of major environmental control functions, is also treated in this section. Pressurization in this case may be defined as the task associated with the storage and control of a pressurizing fluid, leakage control, and repressurization. Although secondary to the thermal energy balance, the function of pressure control is nevertheless an important aspect of the overall environmental problem.
Rationale
This document has been determined to contain basic and stable technology which is not dynamic in nature.
Topic
Data Sets - Support Documents
Title | Description | Download |
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Unnamed Dataset 1 | ||
TABLE 1 | Types of Automatic Controllers for Temperature Control Systems | |
TABLE 2 | Temperature Sensors and Thermoswitches | |
TABLE 3 | Thermal Properties of Some Heat Storage Materials | |
TABLE 4 | Heats of Solution of Representative Substances | |
TABLE 5 | Comparative Thermal and Electrical Resistances of Various Electrical Insulating Materials (Washers) | |
TABLE 6 | Effect of Electrical Insulators on Thermal Resistance of Typical Component Mounting Joint (refer to ) | |
TABLE 7 | Effect of Air Removal Upon Thermal Conductivity of Various Materials at 100 °F Mean Temperature | |
TABLE 8 | Absorptance and Emittance of Materials Found in Explorer VII Satellite Vehicle | |
TABLE 9 | Variation of Thermal Conductivity at 100 °F of Various Insulating Materials with Interstitial Pressure | |
TABLE 10 | Properties of Some Substances Suitable as Expendable Coolants | |
TABLE 11 | Liquid Properties and Trouton's Rule | |
TABLE 12 | Comparison of Water Method to Ammonia Method (see ) | |
TABLE 13 | Weight Comparison of Expendable Coolants (Q = 1000 W, t = 130 °F, Δτ = 1 h) | |
TABLE 14 | Comparison of Liquids for Semipassive Closed Loop Cooling | |
TABLE 15 | Comparison of Gases for Semipassive Closed Loop Cooling | |
TABLE 16 | Comparison of Artificial Atmospheres | |
TABLE 17 | Physical Properties and Absorption Characteristics of Wick Materials | |
TABLE 18 | Typical Vapor Velocities N and N | |
TABLE 19 | Minimum Ratios for Condensing Side to Radiating Side Heat Transfer Coefficients for Integral Condenser-Radiators | |
TABLE 20 | Summary of Properties of Selected Refrigerants | |
TABLE 21 | Vapor Cycle System Weight and Performance Characteristics | |
TABLE 22 | Vapor Cycle System Weight and Performance Characteristics | |
TABLE 23 | Range of Suitable Specific Speeds for Various Compressor Types | |
TABLE 24 | Range of Suitable Specific Speeds for Turbines | |
TABLE 25 | Weight and Performance Characteristics of a Gas Cycle Refrigeration System | |
TABLE 26 | Leakage Rates of Vehicles |
Issuing Committee
AC-9 Aircraft Environmental Systems Committee
Furthers the advancement of technology related to the research, design, test and utilization of aircraft environmental and anti-icing/deicing systems. Develops and updates standards, recommended practices, and information reports contributing to the quality, economy, and safety of commercial and military aircraft.
Reference
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