A loop heat pipe (1, 1A, 1B, 1C) comprising: a first loop heat pipe including a first evaporator configured to vaporize a first working fluid into vapor, a first condenser configured to liquefy the vapor of the first working fluid, a first liquid pipe configured to connect the first evaporator and the first condenser, and a first vapor pipe configured to connect the first evaporator and the first condenser, and to form a first loop together with the first liquid pipe; a second loop heat pipe including a second evaporator configured to vaporize a second working fluid into vapor, a second condenser configured to liquefy the vapor of the second working fluid, a second liquid pipe configured to connect the second evaporator and the second condenser, and a second vapor pipe configured to connect the second evaporator and the second condenser, and to form a second loop together with the second liquid pipe; wherein the first loop and the second loop are separate and independent from each other; characterized in that the loop heat pipe further comprises a connecting part (30, 30A) connecting the first condenser of the first loop heat pipe and the second evaporator of the second loop heat pipe, said connecting part being configured to transfer heat from the first condenser of the first loop heat pipe to the second evaporator of the second loop heat pipe, and wherein the first loop heat pipe, the second loop heat pipe, and the connecting part are integrally formed by a metal. a first loop heat pipe including a first evaporator configured to vaporize a first working fluid into vapor, a first condenser configured to liquefy the vapor of the first working fluid, a first liquid pipe configured to connect the first evaporator and the first condenser, and a first vapor pipe configured to connect the first evaporator and the first condenser, and to form a first loop together with the first liquid pipe; a first evaporator configured to vaporize a first working fluid into vapor, a first condenser configured to liquefy the vapor of the first working fluid, a first liquid pipe configured to connect the first evaporator and the first condenser, and a first vapor pipe configured to connect the first evaporator and the first condenser, and to form a first loop together with the first liquid pipe; a second loop heat pipe including a second evaporator configured to vaporize a second working fluid into vapor, a second condenser configured to liquefy the vapor of the second working fluid, a second liquid pipe configured to connect the second evaporator and the second condenser, and a second vapor pipe configured to connect the second evaporator and the second condenser, and to form a second loop together with the second liquid pipe; wherein the first loop and the second loop are separate and independent from each other; characterized in that the loop heat pipe further comprises a connecting part (30, 30A) connecting the first condenser of the first loop heat pipe and the second evaporator of the second loop heat pipe, said connecting part being configured to transfer heat from the first condenser of the first loop heat pipe to the second evaporator of the second loop heat pipe, and a second evaporator configured to vaporize a second working fluid into vapor, a second condenser configured to liquefy the vapor of the second working fluid, a second liquid pipe configured to connect the second evaporator and the second condenser, and a second vapor pipe configured to connect the second evaporator and the second condenser, and to form a second loop together with the second liquid pipe; wherein the first loop and the second loop are separate and independent from each other; characterized in that the loop heat pipe further comprises a connecting part (30, 30A) connecting the first condenser of the first loop heat pipe and the second evaporator of the second loop heat pipe, said connecting part being configured to transfer heat from the first condenser of the first loop heat pipe to the second evaporator of the second loop heat pipe, and wherein the first loop heat pipe, the second loop heat pipe, and the connecting part are integrally formed by a metal.