The suitability of the low-temperature cycle of a vapour power-plant based on an organic fluid for cooling technical equipment that requires cooling during operation, e.g. power transformers, has been presented. The stream of the intermediate fluid, usually oil, which removes heat from the equipment being cooled is the upper heat reservoir of a power plant based on the Clausius-Rankine cycle. The byproduct of the operation of such an installation is electricity, which can be used to drive the fan cooling tower of the power plant. The assumed working parameters of the cycle, and mainly the criteria for selecting the organic working-fluid, whose properties have a major impact on the operating effectiveness of the solution, are proposed. (c) 2007 Elsevier Ltd. All rights reserved.