CONSTRUCTION
Heat Supply and Ventilation
DOI.org/10.5281/zenodo.896984
Kogal A., Shtym A.
ANNA KOGAL, Research Assistant, e-mail: kogal_aa@mail.ru
ALLA SHTYM, Candidate of Engineering Sciences, Professor, e-mail: shtym_alla@mail.ru
Department of Engineering Systems of Buildings and Constructions, School of Engineering
Far Eastern Federal University
8 Sukhanova St., Vladivostok, Russia, 690091
The influence of the thickness of the heat-insulating layer and the bulk of the cold source on the time of its storage
Abstract: The preservation of snow or ice to be used in air conditioning systems in countries with cold and snowy winters enables one to significantly save energy in summer. The main problem to be solved when using natural cold sources in cooling systems is to maintain the required amount of cold before the start of the operating period and in its course. The paper presents the ways to maintain renewable cold sources and the design of a cold generator. It contains the authors’ method to define the storage time for cold source depending on the amount of the cold and the heat-insulation layer of the cold generator. Determined are the operating mode of the cold store and the ways to preserve snow or ice. On the basis of the patent obtained by the authors, a pilot unit of a three-stage cold generator has been designed. Presented are the results of experimental studies on the storage of natural source of cold in the cold generator, the model of the distribution of cold losses, and the results of the calculation of the heat balance in the “three-step cold generator” unit. Determined are the degree of the effect which the bulk of the cold source has on the time of its storage as well as the dependence of the time of storage on the thickness of the heat-insulation layer. Basing on the research it is possible to determine the optimal thickness of the insulation and the storage time taking into account the amount of the cold source of and the period of operation.
Key words: solid snow, cold source, cold generator, air-conditioning system.
- Kokorin О.J. Modern air conditioning system. M., Publishing House of Physico-mathematical Literature, 2003, 272 p.
- Cold generator, Patent N 133265 Russian Federation, IPC F25D 3/02 N 2013130073/12; G.A. Zakharov, A.S. Shtym, A.A. Kogal, S.A. Chechetko, K.V. Tsygankova. Appl. 01.07.2013, publ. 10.10.2013, Bull. N 28.
- Kobiyama M., Kawamoto S., Kaneko Y., Anayama M., Hara F. Preservation of Snow until Summer by Groung-Level Storage Room. Proceedings of the Sixth Intern. Symposium on Cold Region Development, 2000. Hobert, Australia, p. 229-232.
- Skogsberg K., Nordell B. Snow cooling in Sweden. Thermal energy storage. 2006 EcoStock. 10th Intern. Conf. on Thermal Energy Storage, May 31–June 2, 2006, the Richard Stockton College of New Jersey; proceedings. Pomona, NJ, Richard Stockton College of NJ, 7 p.