What's the Temperature of Outer Space? on twitter. In block 220 a determination is made whether the heat pump is providing the desired level of heat. The load on the first temperature modification source can be determined in a number of ways, including, but not limited to, measuring the percent output or measuring the duty cycle. FIG. 1, the furnace 110 is located within the enclosure 10, and the heat pump 120 is located outside of the enclosure 10. Controlling the level of temperature of equipment, payloads, satellites and launchers is essential during all phases of a space mission to protect flight hardware and to guarantee the optimum performance and success of the mission. a fossil fuel furnace and/or air conditioning system) and at least selectively activate the first temperature modification source (e.g. Assignors: SCHNELL, ROBERT J., STONER, MARCUS D. Assigned to JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT, JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT. Its working fluid is CFC-12, similar to freon that is used in older automobile air conditioners. The ISS experiences a wide range of temperatures. The ongoing development of space-based communications, sensors, and experiments, as well as the evolution of spacecraft electronics, are driving demand for tighter thermal control and more efficient heat removal in low temperature microgravity environments. not meeting the current load) the heat pump is locked out and the furnace is turned on, as shown in block 230. International Space Station temperature control is a good deal more important than keeping things inside comfortable. For example, on a windy night the heat load of the building may exceed the heating capacity of the heat pump even though the outside air temperature is above the heat pump lockout temperature. Thermal control is what allows maintaining the satellite‘s (or another space system) temperatures within set parameters during its lifetime. Many heating systems utilize both a heat pump as the first temperature modification source and a fossil fuel furnace as the second temperature modification source. The system monitors the inside temperature and determines that the inside temperature is moving away from the set point during the heating cycle, indicating a failure to heat condition. As used herein, the terms âdisabledâ and âlocked outâ are used to describe a situation in which the temperature modification source is inoperable due to an override by the control system, and âactivatedâ is used to describe a situation in which the temperature modification source is enabled and may or may not be currently running. A method for controlling an environmental control system that services an inside space of a building, the environmental control system having a first temperature modification source and a second temperature modification source, both for modifying the temperature of the inside space of the building, the environmental control system further having a temperature set point, the method comprising: disabling the first temperature modification source; and. What is the Total Amount of Money in the World? The propellant lines and tanks and thrusters are maintained at appropriate temperatures by classic approaches: thermal blankets known as multi-layer insulation and thermostatically controlled heaters. The highly reflective gold finish effectively isolates the rover body from emitting heat energy out to the cold, sky temperature. The controller has a temperature set point, generally provided by the user, below which a call for heat is made. In some illustrative embodiments, once the second temperature modification source is activated, the system switches back to the first temperature modification source when the outside air temperature changes by a predetermined amount. They also use thermal blankets and heaters. The aeroshell and lander also have critical equipment that must be temperature-controlled. It is a critical system that keeps the station livable and enables important scientific equipment to conduct the microgravity research that is the station’s primary reason for being. This is only a very small amount above absolute zero, the lowest temperature at which the movement of matter is believed to cease, at -459.67°F (-273.15°C). If the inside temperature does not reach the set point, the heat pump is again disabled and the furnace is reactivated. 1-16, Honeywell, Copyright 2001. %���� heat pump) and at least selectively activate the second temperature modification source (e.g. In fact, the life expectancy of the rover would fall short of its requirement by nearly 70 Mars days. @Infogrades One illustrative method is shown in FIG. Thermal control is also what keeps the specified temperature stability for delicate electronics or optical components so as to ensure that they perform as efficiently as possible. Variation in the temperature of space near the Earth is primarily based on location and time: Temperatures are drastically different on the light and shaded sides of the planet, which gradually … 3 0 obj Many components have their lifetimes reduced by sustained high temperatures. In this situation the heat pump may not have the capacity to maintain the desired inside air temperature. Thermal control is absolutely essential for both the physical integrity of the satellite and for its efficient operation because electronic equipment have their optimum performance within a certain temperature range. A subsequent determination is then made regarding whether the inside temperature has a predetermined relationship with the temperature set point, and if so, the furnace is disabled and the heat pump is at least selectively activated. @��o4�˗���i7}��__���vs��.>^~�?����������{h�n�����.���7L�Ҩ������UQ��M�����˷���Vo���|�ͫ�����UY��� �@�Y!j�� -������7W��Ň?~���|�`Wo�r�o��갖+�%Vm�+���B��]���> �w�~ݬn�zU|����5�-|G �����Z�aj���o����^����g�s���}�= C-\W[�{w��&�g(M]�&��)��4�*5/j&���^�=Nq��[�������*�M���k�j ���ٯ/j� ��W����d��U)�)�R)������?�ҿ]_4���:.�lq�? Just as a light bulb gives off heat or a car engine produces excess heat that can be felt through the hood, the rover can run the risk of working too hard and overheating. The present invention generally relates to methods and systems for controlling the operation of multiple temperature modification sources that service a building or other enclosed space, and more specifically, to methods and systems for controlling which temperature modification source or system should be used at any given time for increased energy efficient operation.
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