Title: Process control strategy and its impact on performance of the cold box of guarded hot box test facility for U-value measurement
Authors: Debasish Chowdhury; Rajesh Chatterjee; Subhasis Neogi
Addresses: School of Energy Studies, Jadavpur University, Kolkata-700032, India ' School of Energy Studies, Jadavpur University, Kolkata-700032, India ' School of Energy Studies, Jadavpur University, Kolkata-700032, India
Abstract: Overall heat transfer coefficient or thermal transmission coefficient or U-value is an important tool for thermal characterisation of any building material. The guarded hot box test facility is used for evaluation of U-value of any material. In this paper a detailed insight has been given into the overall control strategy to be implemented for maintaining a constant low temperature inside the cold box of a guarded hot box test facility. Thereafter impacts of varying control parameters of the controller on the overall system performance have also been given.
Keywords: guarded hot box; test facility; cold box; proportional integral derivative; PID control; process control; U-value measurement; heat transfer coefficient; thermal characterisation; building materials; constant low temperature.
International Journal of Energy Technology and Policy, 2016 Vol.12 No.2, pp.181 - 196
Received: 27 Feb 2014
Accepted: 12 Mar 2015
Published online: 24 Mar 2016 *