With the economizer enabled when the
outside air temperature is less than the return air temperature, we spend much of the winter in economizer mode.
Unfortunately,
outside air temperature, barometric pressure, throttle position, RPM and forward speed are a few of the variables that make it extremely difficult to achieve a quantitative assessment of one filter versus another, in terms of power gains.
At 38,000 feet -- the cruising altitude of the Hawaiian Airlines flight that the FBI says the 15-year-old took Sunday -- the
outside air temperature is about minus 85 degrees.
It is strongly recommended that these suits be used when the water temperature is 50 F or below, or when the
outside air temperature is below 32 F (corrected for wind-chill).
As well as providing the correct heat input under winter operating conditions, the burner systems are capable of a 'turndown' which is able to deliver an air temperature rise of only 1-2[degrees]C when the
outside air temperature is 19-20 [degrees]C."
Elapsed Time
Outside Air Temperature (F) Elapsed Time 70 75 80 85 90 95 0 minutes 70 75 80 85 90 95 10 minutes 89 94 99 104 109 114 20 minutes 99 104 109 114 119 124 30 minutes 104 109 114 119 124 129 40 minutes 108 113 118 123 128 133 50 minutes 111 116 121 126 131 136 60 minutes 113 118 123 128 133 138 > 1 hour 115 120 125 130 135 140
Temperatures inside buses can be higher than
outside air temperature, which is officially taken from readings in the shade, experts have said.
Engine and airplane manufacturers' data recommend preheating the engines when the '
outside air temperature is cold.
As anyone who has spent a night in the late fall or winter can attest, as soon as the lantern or stove is extinguished in a tent, the inside temperature drops immediately to the
outside air temperature. Recently I field-tested a great design that should have been thought of years ago--an insulated tent aptly named the Arctic Oven from Alaska Tent & Tarp.
This approach uses traditional styles of air cooling systems, such as DX Gas or water, but exploits outdoor plant to use the
outside air temperature to cool a secondary medium which is in turn used to cool the data centre.
Regarding the air conditioning, the system relies on
outside air temperature and humidity sensors to determine whether to bring in outside air to cool the facility or use chilled water to cool the facility.
A The computer in every fuel-injected car must know two things before it can figure out the correct cold-start air/fuel mixture: the engine coolant temperature and the
outside air temperature. Your symptoms are a dead ringer for a bad engine coolant temperature sensor (ECT).