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S60 & V60 '18> / XC60 '17> / S90 & V90 '16> / XC90 '15> General Forum for the SPA-platform 60- and 90-series models |
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HUD or heated windscreenViews : 59167 Replies : 286Users Viewing This Thread : |
View Poll Results: Which option would you sekect | |||
HUD | 205 | 46.91% | |
Heated windscreen | 232 | 53.09% | |
Voters: 437. You may not vote on this poll |
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Oct 30th, 2020, 09:13 | #171 | |
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To be clear. I am pretty certain that there is NOT any form of electric heating for the HVAC system on SPA cars. I'm happy to admit I'm wrong if proven otherwise. |
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Oct 30th, 2020, 10:43 | #172 | |
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Oct 30th, 2020, 11:12 | #173 | |
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You just need to read your handbook where it says : Electric additional heater Cars used in cold climates have an electric additional heater integrated into the car's climate control system. In a semi-cold climate zone cars have an electric additional heater instead of a fuel-driven version. The heater cannot be controlled manually but is instead activated automatically after the engine has been started in outside temperatures below 14 °C and is switched off after the set passenger compartment temperature has been reached. In practice it is in UK cars what do you think those heavy duty Red and black wires are for in the passenger footwell under the carpet hear the heater ? That is why I say that a heated front screen is a marketing tool and so would anyone else who has experienced the remarkable defrosting properties of volvos without heated screens . PTC element (Positive Temperature Coefficient) On some markets with a cold climate the vehicle uses a PTC element as an extra heater. Even four cylinder engines, in some cold markets, use a PTC element. The PTC element is also available as an option. The PTC element heats the passenger compartment quicker at lower outdoor temperatures. This is essential as the coolant does not emit sufficient heat, especially during the initial minutes after the engine has been started. The PTC element is placed in the climate unit after the heat exchanger. It is accessible from the front. The air that flows past the hot PTC element, on its way into the passenger compartment, is heated directly. Typical characteristics of a PTC element: fast heating directly after start high degree of efficiency lightweight, compact design cannot be overheated maintenance free. The PTC element consists of small metal coated ceramic plates (1) sandwiched with radiator elements (2) of aluminium. These layers are held together in a frame (3) of a spring element. The aluminium element has the task of conducting current at the same time as it transfers heat to the air flow. The maximum output of the PTC element is 1250W. The PTC element has a positive thermal coefficient. This means that the resistance value is relatively small at low temperatures and increases with the rising temperature. When the cold PTC element is voltage fed, the current is high during the initial stage and heats up the element. With a rising temperature the ceramic's resistance value also increases whereupon power consumption drops. It takes approximate 20 seconds until the stabilisation current is reached. The ceramic temperature is dependent on the heat output and the ambient temperature. With good thermal dissipation the temperature drops and with that the resistance. This results in an increase in power consumption and with that an increase in temperature. If a small amount of heat is emitted to the surroundings, the temperature of the ceramic rises and with that the resistance. Through this cycle the heating element is regulated with its own power consumption. The result is an equilibrium between the supplied electrical energy and the emitted thermal energy. The Climate control module (CCM) controls, via the Central electronic module (CEM), the function of the PTC element. For more information, see Design and Function, Climate control module (CCM) and Design and Function, Central electronic module (CEM).
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Oct 30th, 2020, 12:13 | #174 | |
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Again... there is no evidence of PTC heaters in SPA cars. Please provide your sources to prove otherwise |
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Oct 30th, 2020, 16:11 | #175 |
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sorry i didn't realise we were talking about the latest models although I see no reason to think they would have deleted it , You look both sides of the heater behind the side panels and see if there are heavy red and black cables going to it ... You could put a thermometer to measure the temperature of the air coming out the vents from a cold start on an icy day ..
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Oct 30th, 2020, 20:27 | #176 |
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This is a forum for SPA models......
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Currently:- - MY24 EX30 Ultra, Long Range, Single Motor, Black, Mist - MY17 V60 T4 Power Blue. Previously:- 1997 V70 T5 exPolice; 2005 V50 2.0D; 2013 XC70 D5; 2016 XC90 T8 |
Oct 30th, 2020, 20:34 | #177 | |
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Perhaps there was some sort of early prototype in the 60s as you say, but the current technology of fully heated screens with tiny almost see through lines was brought to market by Ford in the mid 90s.
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Currently:- - MY24 EX30 Ultra, Long Range, Single Motor, Black, Mist - MY17 V60 T4 Power Blue. Previously:- 1997 V70 T5 exPolice; 2005 V50 2.0D; 2013 XC70 D5; 2016 XC90 T8 |
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Oct 30th, 2020, 20:53 | #178 |
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You have put the problem with the heated windscreens when you mention the fine lines if the sun or headlights are in the wrong direction its like looking through bars thats why I would never buy a car with a heated windscreen if the choice is head up display it would be my choice every time.
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Oct 30th, 2020, 21:04 | #179 |
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To answer your question Yes you DO have a PTC electric element in the heater on SPA cars as I thought , the XC90 also has them in the rear side ducts .
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Oct 30th, 2020, 21:10 | #180 | |
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I suggest you search for Triplex Electrically headed windscreens . I have spent more than enough time on you today trying to educate you .
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