Effective heat utilization for energy saving in food and beverage thermal isolated containers

Abstract

The purpose of this paper is to create a rapid temperature balancing container which can firstly absorb heat from the stored thing to change its temperature within minutes into a desired value set by the melting temperature and type of the used phase change materials (PCMs), and then keep that temperature last longer as the absorbed heat is later released. Models in different geometrical shapes using a commercial PCM, called PW-70, with melting temperature of 70 o C have been made and tested carefully in laboratory. The best results of the four tested models, derived from the multi-layer model, have shown that average temperature of the boiled water which was acting as the stored substance reached the desired range of 55 ~ 65 o C within only about 15 minutes and this temperature range lasted within nearly 5 hours. It is also shown that this period is even much longer if the desired temperature value is lower. This is a big advantage compared with the vacuum container without PCM in which the desired range was reached after about 4 hours but lasted for only more than 2 hours. With this good performance, the new design has shown much more effective utilization of heat energy in food or beverage preservation purpose.

Thermoplastic Polyurethane Blends With Thermal Energy Storage/Release Capability

“…This concept was successfully applied in power generation systems (Farid et al, 2004;Demirbas, 2006;Wang et al, 2015;Zhang et al, 2016) and building constructions (Kuznik et al, 2011), applications in which about one half of the energy consumption is in the form of thermal energy, and the energy request can markedly vary in time (Kenisarin and Kenisarina, 2012;Juozapaitis et al, 2013;Robaidi, 2013). TES systems were applied in the food storage (Gin and Farid, 2010;Chen et al, 2011) and for the construction of highly efficient solar plants (Lane, 1986;Norton, 1992;Bal et al, 2010). Some innovative applications in the textiles industry of TES technology are represented by "smart" fabrics able to keep constant the temperature of the body (Shim et al, 2001;Ren and Ruckman, 2004;Shin et al, 2005;Gao et al, 2011;Sarier and Onder, 2012;Borreguero et al, 2013).…”

Phase changing nanocomposites for low temperature thermal energy storage and release

“…TES technology have been also investigated in the textiles industry for the production of 'smart' fabrics able to maintain the right temperature of the body [9][10][11][12][13][14]. Other applications could be represented by the food storage [15,16] and the development of innovative solar plants [17][18][19]. Latent heat TES systems has recently attracted the attention of researchers, because these systems are characterized by a high energy storage density at constant temperature corresponding to the transition temperature of the phase change material (PCM) [18,20].…”