Heat receiver tube, method for manufacturing the heat receiver tube, solar collector with the heat receiver tube and method for producing electricity by using the solar collector

A heat receiver tube for absorbing solar energy and for transferring absorbed solar energy to a heat transfer fluid which can be located inside of at least one core tube of the heat receiver tube, wherein the at least one core tube comprises a core tube surface with at least one solar energy absorptive coating for absorbing solar radiation;

• the at least one core tube is enveloped by at least one enveloping tube;
• the enveloping tube comprises at least one enveloping tube wall which is at least partly transparent for the solar radiation;
• the enveloping tube wall comprises at least one inner enveloping tube surface;
• the at least one core tube and the enveloping tube are coaxially arranged to each other such that an inner heat receiver tube space is formed which is bordered by the core tube surface and the at least one inner enveloping tube surface;
• and
• the heat receiver tube comprises at least one pressure adapting device for adapting a space pressure of the inner heat receiver tube space compensating to an environmental pressure of an environment of the heat receiver tube.