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

摘要

Heat receiver tube (1) for absorbing solar energy and for transferring absorbed solar energy to a heat transfer fluid (111) which can be located inside of at least one core tube (11) of the heat receiver tube (1). The core tube (11) comprises a core tube surface (112) with at least one solar energy absorptive coating (1121) for absorbing solar radiation (2). The core tube (11) is enveloped by at least one enveloping tube (10). The enveloping tube (10) comprises at least one enveloping tube wall (101) which is at least partly transparent for the solar radiation (2). The enveloping tube wall (101) comprises at least one inner enveloping tube surface (102). The core tube (11) and the enveloping tube (10) are coaxially arranged to each other such that an inner heat receiver tube space (3) is formed which is bordered by the core tube surface (112) and the inner enveloping tube surface (102). The inner heat receiver tube space (3) comprises an inert gas (5). The heat receiver tube (1) comprises at least one dimension adapting device (6) with a flexible adapting device wall (60) for compensation of a thermally induced change of at least one dimension of the heat receiver tube (1). The enveloping tube (10) and the dimension adapting device (6) are joined together by at least one heat receiver tube skirt (103) with at least one heat receiver tube skirt wall (1031). The heat receiver tube skirt wall (1031) comprises at least one inlet port (4) for pouring in of at least one inert gas (Xe or Kr) into the inner heat receiver tube space (3). The inlet port (4) is sealed by an inlet port sealing (40) for inhibiting a leakage of the inert gas (5) out of the inner heat receiver tube space (4). The inlet port sealing (4) comprises at least one metal (41).