Heating system and method for a jointed wind rotor turbine blade

1. A jointed wind turbine rotor blade, comprising:

a first blade segment;

a second blade segment;

each of the first and second blade segments comprising a pressure side shell member and a suction side shell member;

a chord-wise joint separating the first and second blade segments;

internal joint structure joining the first and second blade segments across the chord-wise joint;

a first heating system mounted within the first blade segment;

a second heating system mounted within the second blade segment;

a disconnectable coupling configured between the first and second blade segments at the chord-wise joint, the coupling configured to supply a fluid medium from the first blade segment across the chord-wise joint for use by the second heating system in the second blade segment, the coupling comprising a member in the first blade segment that mates with a member in the second blade segment at the chord-wise joint in a connected state of the coupling, wherein in a disconnected state of the coupling, the members are separated and the fluid medium is separated at the interface at the chord-wise joint; and

wherein the first heating system comprises a hot air heating system configured within the first blade segment, and the second heating system comprises a hot air heating system within the second blade segment, the coupling comprising disconnectable ducting that supplies hot air as the fluid medium across the chord-wise joint and into the second blade segment.

2. The jointed wind turbine rotor blade of claim 1 , wherein the first blade segment is adjacent a root end of the wind turbine rotor blade, and the second blade segment is adjacent a tip end of the wind turbine rotor blade.

3. The jointed wind turbine rotor blade of claim 1 , wherein the first and second heating systems are independently controllable.

4. The jointed wind turbine rotor blade of claim 1 , wherein the internal joint structure comprises a beam structure extending span-wise from one of the first or second blade segments into a receiving section formed in the other of the second or first blade segment, the coupling configured across an external surface of the receiving section and an external surface of the beam structure at the chord-wise joint.

5. The jointed wind turbine rotor blade of claim 1 , wherein the internal joint structure comprises a beam structure extending span-wise from one of the first or second blade segments into a receiving section formed in the other of the second or first blade segment, the coupling configured through the receiving section and into the beam structure, wherein the fluid medium is conveyed through an internal conduit in the beam structure.

6. The jointed wind turbine rotor blade of claim 1 , wherein the internal joint structure comprises one or more chord-wise walls separating the first and second blade segments at the chord-wise joint, the coupling comprising one or more disconnectable conduits for the fluid medium through the chord-wise walls.

7. The jointed wind turbine rotor blade of claim 1 , wherein the internal joint structure comprises a beam structure extending span-wise from one of the first or second blade segments into a receiving section formed in the other of the second or first blade segment.

8. The jointed wind turbine rotor blade of claim 1 , further comprising a lightning strike conductor that bridges the chordwise joint and connects blade tip receptors to a blade root grounding system, the lightning strike conductor comprising an in-line disconnectable connector at the chordwise joint.

9. A wind turbine, comprising one or more of the jointed wind turbine blades according to claim 1 .

10. A method for supplying heat for deicing in a jointed wind turbine rotor blade, wherein the blade includes a first blade segment adjacent a root end of the wind turbine rotor blade, a second blade segment adjacent a tip end of the wind turbine rotor blade, and internal joint structure joining the first and second blade segments across a chord-wise joint that separates the first and second blade segments, the method comprising:

mounting a first heating system within the first blade segment;

mounting a second heating system within the second blade segment;

configuring a disconnectable coupling between the first and second blade segments at the chord-wise joint, the coupling comprising a member in the first blade segment that mates with a member in the second blade segment at the chord-wise joint in a connected state of the coupling, wherein in a disconnected state of the coupling, the members are separated and a fluid medium is separated at the interface at the chord-wise joint;

supplying the fluid medium from the first blade segment, through the coupling, and across the interface at the chord-wise joint for use by the second heating system in the second blade segment; and

wherein the first heating system is configured as a hot air heating system, the second heating system is configured as a hot air heating system within the second blade segment, and the coupling is configured as disconnectable ducting that supplies hot air as the fluid medium across the chord-wise joint and into the second blade segment.

11. The method of claim 10 , wherein the internal joint structure includes a beam structure extending span-wise from the second blade segment into a receiving section formed in the first blade segment, comprising configuring the coupling with the receiving section and the beam structure.

12. The method of claim 11 , comprising conveying the fluid medium across the chord-wise joint and into the second blade segment through an internal conduit in the beam structure.

13. The method of claim 11 , comprising conveying the fluid medium across the chord-wise joint and into the second blade segment external to the beam structure.

14. The method of claim 10 , wherein the internal joint structure includes a beam structure extending span-wise from the second blade segment into a receiving section formed in the first blade segment, the beam structure and receiving section defining a blockage to hot air being conveyed through the beam structure and the receiving section into the second blade segment, and configuring the ducting to define a bypass around the blockage and into the second blade segment.

15. The method of claim 14 , comprising configuring the ducting to define a path for the hot air into a spar structure within the second blade segment, wherein the beam structure is an extension of the spar structure.