Analytical and experimental studies into the processes of hydrodynamics and heat exchange in the channels of disk pulse devices

Valeriy Nikolsky,Oleksandr Alieksandrov,Viktor Ved,Vadim Yaris,Ivan Kuzyayev,Andrii Pugach,Valerii Lopatin,Serhiy Ptitsyn

doi:10.15587/1729-4061.2019.174629

Abstract

The paper reports an analytical study into the influence of basic parameters of channels in the pulse disk devices on the efficiency of processes of heat exchange and hydrodynamics under the pulse effect on a heat-carrier. A procedure has been proposed for determining basic parameters for the processes of heat exchange and hydrodynamics (flow rate, pressure, a heat-carrier’s temperature) when a liquid is exposed to the pulse effect. Mathematical models have been constructed for the influence of structural and technological parameters of channels in the disk pulse devices on the efficiency of processes of heat exchange and hydrodynamics. Adequacy of the mathematical models has been confirmed by a series of experimental studies involving devices with a single- and multi-step system of the pulse treatment of a heat-carrier. Based on this, we have designed, tested, and implemented industrial structures of the pulse disk heat generators for decentralized heating of buildings for industrial and residential purposes with the single- and two-step pulse influence. The constructed method for a multi-step pulse influence, taking into consideration the results from mathematical modeling, experimentally confirmed and implemented in the structural design of a working chamber in a disk pulse heat generator, has made it possible to improve its energy efficiency by 12 %. We have defined the most efficient geometry for a disk pulse heat generator aimed at its further integration into the system of decentralized heating. A series of experimental studies has been performed, which confirm energy efficiency of the designed devices. One of the designed heat generators with a multistep pulse influence on a heat-carrier has been integrated into a heating system for a shopping mall. Indicators of the heat generator operation meet modern standards of energy efficiency at the level of 0.86‒0.9.

Highlights

In current conditions, great attention is paid to finding new environmentally safe and effective ways to generate energy
A growing body of research related to improving energy efficiency of disk devices based on the pulse treatment of a heat-carrier using renewable environmentally-friendly sources of energy is one of the most important fields in the development of energy complex
Based on the performed analytical and experimental stu dies, we have proven the possibility of using the designed disk pulse heat generator for the systems of decentralized heating

Summary

Introduction

Great attention is paid to finding new environmentally safe and effective ways to generate energy. Emphasis in this case is on the affordability and reproducibility of energy raw materials, environmental safety, economic efficiency, industrial feasibility, reliability, easy fabrication and operation of the equipment. Intensification of the hydrodynamical and heat transfer processes in the disk pulse devices, as a consequence of the optimization of their workspace, is essential to improve existing, as well as construct new, energy-efficient thermal machines with high energy efficiency [3,4,5]. A growing body of research related to improving energy efficiency of disk devices based on the pulse treatment of a heat-carrier using renewable environmentally-friendly sources of energy is one of the most important fields in the development of energy complex

Literature review and problem statement

The aim and objectives of the study

Description of the design features of the experimental

Findings

Conclusions