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Energies 2017, 10(2), 219; doi:10.3390/en10020219

Thermal Analysis of a Thermal Energy Storage Unit to Enhance a Workshop Heating System Driven by Industrial Residual Water

1
Department of Thermal Engineering, School of Metallurgy, Northeastern University, Shenyang 110819, China
2
State Environmental Protection Key Laboratory of Eco-Industry, Northeastern University, Shenyang 110819, China
3
Power Section, Zhejiang Guobang Pharmaceutical Co., Ltd., Shaoxing 311115, China
*
Author to whom correspondence should be addressed.
Academic Editor: Kamel Hooman
Received: 17 December 2016 / Revised: 7 February 2017 / Accepted: 8 February 2017 / Published: 14 February 2017
View Full-Text   |   Download PDF [2663 KB, uploaded 14 February 2017]   |  

Abstract

Various energy sources can be used for room heating, among which waste heat utilization has significantly improved in recent years. However, the majority of applicable waste heat resources are high-grade or stable thermal energy, while the low-grade or unstable waste heat resources, especially low-temperature industrial residual water (IRW), are insufficiently used. A thermal energy storage (TES) unit with paraffin wax as a phase change material (PCM) is designed to solve this problem in a pharmaceutical plant. The mathematical models are developed to simulate the heat storage and release processes of the TES unit. The crucial parameters in the recurrence formulae are determined: the phase change temperature range of the paraffin wax used is 47 to 56 °C, and the latent heat is 171.4 kJ/kg. Several thermal behaviors, such as the changes of melting radius, solidification radius, and fluid temperature, are simulated. In addition, the amount of heat transferred, the heat transfer rate, and the heat storage efficiency are discussed. It is presented that the medicine production unit could save 10.25% of energy consumption in the investigated application. View Full-Text
Keywords: industrial residual water (IRW); thermal energy storage (TES); phase change material (PCM); paraffin wax; workshop heating industrial residual water (IRW); thermal energy storage (TES); phase change material (PCM); paraffin wax; workshop heating
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Sun, W.; Zhao, Z.; Wang, Y. Thermal Analysis of a Thermal Energy Storage Unit to Enhance a Workshop Heating System Driven by Industrial Residual Water. Energies 2017, 10, 219.

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