Learn about the remarkable heat pump technology built into Tesla Models S, 3, the passenger compartment, battery and electronic components of the powertrain.

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POST-VIDEO ADDITIONS:
1. The system's air conditioning compressor is a high-volume Denso 41 cc, while Teslas equipped with a PTC cabin heater use a Hanon 33 cc air conditioning compressor.

FIXES:
1. I am corrected regarding the six electronic expansion valves (EXV) of the supercollector. They actually use precision stepper motors instead of pulse width modulated solenoids. I appreciate Engineerix for pointing out my error.

CHRONOLOGY:
00:00 Presentation
0:46 Cabin heating method 1. The PTC coolant heater
3:30 p.m. Cabin heating method 2. The PTC air heater
5:07 Cabin heating method 3. The heat pump
6:45 How to determine if your Tesla has a heat pump
7:25 The benefits of using a heat pump
8:26 Coefficient of performance (COP)
9:55 a.m. Operation above 10 degrees C (50 F) with 16 different heat sources
11:15 a.m. Heat source 1. The cabin condenser
14:23 Heat source 2. The fan motor
15:51 Heat source 3. The radiator
18:46 Heat source 4. The high voltage battery
7:50 p.m. Heat source 5. The DC-DC converter inside the power conversion system
20:48 Heat source 6. The charger converter built inside the power conversion system
8:48 p.m. Heat source 7. The autopilot computer
10:58 p.m. Heat source 8. The cooler
25:43 Heat sources 9 and 10. The front and rear drive unit inverters
26:58 Heat sources 11 and 12. The front and rear drive unit stators
28:52 Heat source 13. Cabin air
30:18 Heat source 14. The liquid cooled condenser (LCC)
33:19 Heat source 15. The air conditioning compressor
35:03 Heat source 16. High pressure hot steam recirculated into the receiving dryer through a mister.
37:11 Operation below 10 degrees C (50 F) with 6 additional heat sources
37:30 Additional heat source 1. A/C compressor operates in lossy mode
39:00 Additional heat source 2. Fan motor operates in lossy mode
39:27 Additional heat sources 3 and 4. Front and rear drive unit inverters operate in lossy mode
39:58 Heat sources 5 and 6. The front and rear drive unit stators operating in lossy mode
43:22 Understand the coolant side and refrigerant side of the supercollector.
43:40 Visualizations of the four supermanifold coolant flow modes in Service mode.
44:08 Visualization of flow, pressure and temperature of the refrigerant supercollector in Service mode.
44:50 The basic air conditioning refrigerant loop and supercollector.
47:34 The three pressure-temperature sensors.
48:40 The receiver/dryer/accumulator with a desiccant bag.
51:02 The three one-way check valves for refrigerant (evaporator, LCC, cabin condenser (CC)).
53h00 The six stepper motors of the electronic expansion valves (EXV) (chiller, evaporator, left DC, right DC, LCC, recirculation).
56:26 The LCC shut-off valve solenoid (on/off)
58:04 The cooler
58:38 The liquid cooled condenser (LCC)
59:36 The components of the coolant control portion of the supermanifold.
1:00:35 Both coolant pumps (HV Battery and Powertrain)
1:01:50 The octovalve
1:03:01 The coolant circulates in parallel mode through the octovalve.
1:03:50 Coolant flows in radiator bypass mode in series through the octovalve.
1:04:31 The coolant circulates in Ambient Source mode through the octovalve.
1:04:56 The coolant flows in series mode through the octovalve.
1:06:48 Connect the two sections of the supercollector together
1:07:58 The coolant reservoir
1:09:45 Heat pump summary

ABOUT US
Weber State University (WSU) Davis Campus – Department of Automotive Technology – Advanced Vehicle Laboratory. A technical description and operational demonstration of the Tesla heat pump system.

We teach current automotive technologies to our automotive students at Weber State University and online. For more information, visit: http://www.weber.edu/automotive

This video was created and edited by WSU Professor John D. Kelly. For a full biography, see http://www.weber.edu/automotive/J_Kelly.html

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