AI Article Synopsis
- - The research presents findings on a hybrid drive system that enhances combustion engines using a pneumatic-hydraulic motor, focusing on a specially designed heat exchanger to utilize waste heat for air heating.
- - The key innovation in the heat exchanger design is the use of copper foam, which increases the heat exchange surface area, thus improving efficiency significantly under various testing conditions.
- - Experimental results show that the heat exchanger can reduce air consumption in the drive system by 11% to 58% and boost air expansion efficiency by 16% to 30%, achieving a maximum efficiency of 96%.
Article Abstract
The results of the first stage of work aimed at improving a hybrid drive system in which the combustion engine is supported by a pneumatic-hydraulic motor are presented. The purpose of the described work was to show that a heat exchanger with a design adapted to the operating conditions of a pneumatic-hydraulic motor would allow sufficient air heating at the expense of waste heat from the combustion engine, thus increasing the efficiency of the drive system. It was assumed that the key component of the heat exchanger would be copper foam in order to increase the heat exchange surface. A prototype modular heat exchanger was designed and tested. An open-cell copper foam with a porosity of 0.9 and a pore density of 40PPI was placed in the heat exchanger. Experimental and numerical air heating studies were carried out under various heat exchanger operating conditions. The tests were conducted at initial air temperatures of -123 °C, -71 °C, and 22 °C and air pressures of 2.5 × 10 and 7.0 × 10 Pa. The air mass flux was in the range of 3.6-1644 kg/(ms). It was found that the tested heat exchanger allows a reduction in air consumption in the drive system of 11% to 58% and increases the efficiency of the air expansion system by 16% to 30%. The maximum efficiency of the heat exchanger is 96%. The results of the work carried out will help to improve the pneumatic-hydraulic drive systems of work machines and vehicles.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11595429 | PMC |
| http://dx.doi.org/10.3390/ma17225557 | DOI Listing |
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