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Efficiency Curves

Pressure Efficiency Curve

Checks the worse of input and waste pressures, before the step of removing air from input. 90% efficiency at 1atm, linearly scales to 0% at 0kPa. 100% efficiency is achieved when both are at or above 112.583 kPa.

Temperature Differential Efficiency Curve

Evaluates against the difference between waste and input temperatures. Negative values work against the gradient. 0% against a 200°C temperature difference, 10% when the air conditioner is working against a 100°C temperature difference, 100% at a 0°C difference, and 200% working with a 2000°C assistance.

Curve Values

"TemperatureDeltaEfficiency": {
			"m_Curve": [
				{
					"time": -500,
					"value": 0,
					"inSlope": 0,
					"outSlope": 0,
					"tangentMode": 0,
					"weightedMode": 0,
					"inWeight": 0.33333334,
					"outWeight": 0.33333334
				},
				{
					"time": -200,
					"value": 0,
					"inSlope": 0,
					"outSlope": 0,
					"tangentMode": 0,
					"weightedMode": 0,
					"inWeight": 0.33333334,
					"outWeight": 0.33333334
				},
				{
					"time": -100,
					"value": 0.1,
					"inSlope": 0.002,
					"outSlope": 0.002,
					"tangentMode": 0,
					"weightedMode": 0,
					"inWeight": 0.33333334,
					"outWeight": 0.33333334
				},
				{
					"time": 0,
					"value": 1,
					"inSlope": 0.00092857145,
					"outSlope": 0.0005,
					"tangentMode": 0,
					"weightedMode": 0,
					"inWeight": 0.33333334,
					"outWeight": 0.33333334
				},
				{
					"time": 2000,
					"value": 2,
					"inSlope": 0.0005,
					"outSlope": 0.0005,
					"tangentMode": 0,
					"weightedMode": 0,
					"inWeight": 0.33333334,
					"outWeight": 0.33333334
				}
			],
			"m_PreInfinity": 2,
			"m_PostInfinity": 2,
			"m_RotationOrder": 4
		}

Operational Temperature Efficiency Curve

Evaluated on both internal temperature (pre-heatpumping) and waste network temperature. Worst value of the two is picked.
0% at 100K, 100% between 223-373 K, 50% at 600 K, 30% at 800 K, 5% at 1000 K, 0% at 1200 K.

Curve Values

"InputAndWasteEfficiency": {
			"m_Curve": [
				{
					"time": -1,
					"value": 0,
					"inSlope": 0,
					"outSlope": 0,
					"tangentMode": 0,
					"weightedMode": 0,
					"inWeight": 0.33333334,
					"outWeight": 0.33333334
				},
				{
					"time": 0,
					"value": 0,
					"inSlope": 0,
					"outSlope": 0,
					"tangentMode": 0,
					"weightedMode": 0,
					"inWeight": 0.33333334,
					"outWeight": 0.33333334
				},
				{
					"time": 100,
					"value": 0,
					"inSlope": 0,
					"outSlope": 0,
					"tangentMode": 0,
					"weightedMode": 0,
					"inWeight": 0.33333334,
					"outWeight": 0.33333334
				},
				{
					"time": 223,
					"value": 1,
					"inSlope": 0,
					"outSlope": 0,
					"tangentMode": 0,
					"weightedMode": 0,
					"inWeight": 0.33333334,
					"outWeight": 0.33333334
				},
				{
					"time": 373,
					"value": 1,
					"inSlope": 0,
					"outSlope": 0,
					"tangentMode": 0,
					"weightedMode": 0,
					"inWeight": 0.33333334,
					"outWeight": 0.33333334
				},
				{
					"time": 600,
					"value": 0.5,
					"inSlope": -0.0016393443,
					"outSlope": -0.0016393443,
					"tangentMode": 0,
					"weightedMode": 0,
					"inWeight": 0.33333334,
					"outWeight": 0.33333334
				},
				{
					"time": 800,
					"value": 0.3,
					"inSlope": -0.001125,
					"outSlope": -0.001125,
					"tangentMode": 0,
					"weightedMode": 0,
					"inWeight": 0.33333334,
					"outWeight": 0.33333334
				},
				{
					"time": 1000,
					"value": 0.05,
					"inSlope": -0.0005000001,
					"outSlope": -0.0005000001,
					"tangentMode": 0,
					"weightedMode": 0,
					"inWeight": 0.33333334,
					"outWeight": 0.33333334
				},
				{
					"time": 1200,
					"value": 0,
					"inSlope": 0,
					"outSlope": 0,
					"tangentMode": 0,
					"weightedMode": 0,
					"inWeight": 0.33333334,
					"outWeight": 0.33333334
				}
			],
			"m_PreInfinity": 2,
			"m_PostInfinity": 0,
			"m_RotationOrder": 4
		}

Optimization

Because of the disparity between the amount of gas the air conditioner can take (750 kPa*100L) is much larger than the amount of gas required to achieve full input pressure efficiency (112.583 kPa * 10L), it's possible to cool less gas by a greater margin by limiting the air conditioner's input to that and replenishing it every tick. This significantly increases the temperature difference an air conditioner is capable of achieving.

Example

Venus atmosphere can be approximated as 100% carbon dioxide at 250 kPa and 750 K. The air conditioner's efficiency can be assumed to be 30% if input temperature is the same as waste. This results in 4200 J of cooling available per tick assuming input and waste are at the same temperature. Connecting a single pipe cowl (10L volume) to the input means an input quantity of 0.2938776 moles at that pressure and temperature. With a sensible heat of 28.2 J/mol*K, the 4200 J of cooling result in a temperature drop of 506.79 K, bringing it down to a respectably cold 243 K.

Actual venus atmosphere is cooled down to approximately -1°C in testing.

Even Lower temperatures can be achieved by restricting the input pressure further, although care must be taken to avoid freezing or even reduced cooling caused by the output gases reaching temperatures below absolute zero and being forced back to it.