Rachael Stirling Rachael Stirling Rachael Atlanta Stirling (born 30 May 1977) is an English stage, film and television actress. She has been nominated twice for the Laurence Olivier Award for her stage work. She played Nancy Astley in the BBC drama "Tipping the Velvet", and Millie in the ITV series "The Bletchley Circle". She has also appeared in programmes such as "Lewis", and the long-running BBC One science fiction drama "Doctor Who". Stirling is the daughter of actress Diana Rigg and theatre producer Archibald Stirling. Her parents married in 1982 and divorced in 1990. Through her father, she has a long line
Applications of the Stirling engine be the only widely deployed commercially successful Stirling devices. A Stirling heat pump is very similar to a Stirling cryocooler, the main difference being that it usually operates at room temperature. At present, its principal application is to pump heat from the outside of a building to the inside, thus heating it at lowered energy costs. As with any other Stirling device, heat flow is from the expansion space to the compression space. However, in contrast to the Stirling "engine", the expansion space is at a "lower" temperature than the compression space, so instead of producing work, an "input" of