Heat calculation for the cover of an electrolytic bath

Zinc anode is electrodeposited from a 2-M zinc chloride electrolytic bath with varying ammonium chloride supporting electrolyte concentrations (0-5 M) and plating current density (0.1 – 0.6 A cm-2). The total charge quantity supplied during electrodeposition is fixed at 150 mAh. Alkaline zinc-air cell is fabricated using the electrodeposited zinc anode and characterized according to its discharge capacity at constant load current of 20 mA. The effect of various qualities of zinc electrodeposits on the cell discharge performance is discussed. It is found that zinc electrodeposits prepared from electrolytic bath of 5-M ammonium chloride and 0.5 A cm-2 plating current density produced zinc-air cell with the highest output energy i.e. 24 mWh. We observe that the influence of plating current density is more prominent than the plating bath formulation on the zinc anode performance in the cell.

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Theoretical Calculation and Experimental Study on the Forming Heat of Cement Clinker Made from Steel Slag

Materials Science Forum ◽

10.4028/www.scientific.net/msf.814.564 ◽

2015 ◽

Vol 814 ◽

pp. 564-568 ◽

Cited By ~ 1

Author(s):

Ya Li Wang ◽

Su Ping Cui ◽

Gui Ping Tian ◽

Ming Zhang Lan ◽

Zhi Hong Wang

Keyword(s):

Empirical Equation ◽

Raw Materials ◽

Steel Slag ◽

Great Influence ◽

Cement Clinker ◽

Chemical Components ◽

Forming Process ◽

Acid Dissolution ◽

Heat Efficiency ◽

Heat Calculation

When steel slag, a by-product of steel making in impurity catching process, is added, the forming process of cement clinker and the major reactions in that process are changed. Since there are dramatic differences between the chemical components and mineral compositions of steel slag and that of natural cement raw materials, the empirical equation for the calculating forming heats of cement clinker made of limestone and clay is no longer applied for those made of steel slag. In this paper, the empirical equation for forming heat calculation of steel slag added cement clinker was promoted, and testified by acid dissolution experiments. Results showed that the change of raw materials had great influence on the forming heat of cement clinker. When the traditional raw materials were replaced with steel slag, the forming heat of cement clinker reduced. Calculating the forming heat by our revised empirical equation can help reduce errors and bring great convenience for the calculation and evaluation of heat efficiency. This research provides theoretical underpinning for the study and calculation of forming heat of steel slag added cement clinker.

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EFFECT OF BORATES AND SILICATES ON WEARING PROPERTIES OF MAO COATINGS

Surface Review and Letters ◽

10.1142/s0218625x17500615 ◽

2016 ◽

Vol 24 (05) ◽

pp. 1750061

Author(s):

Yu ZHANG ◽

YAN-WEI ZHAO ◽

NAN XIANG ◽

REN-GUO SONG

Keyword(s):

Mechanical Properties ◽

Aluminum Alloy ◽

Treatment Time ◽

Microarc Oxidation ◽

Smooth Structure ◽

Electrolytic Bath ◽

Optimum Treatment ◽

The One ◽

Wear Tests

In the present study, microarc oxidation (MAO) coatings were formed on ZL101A aluminum alloy in an electrolytic bath containing 3[Formula: see text]g/L KOH [Formula: see text] 2[Formula: see text]g/L Na2WO[Formula: see text] 4[Formula: see text]g/L KF. The morphology and wearing behavior were investigated. In both electrolytes, the additives were borates (Na2B4O718[Formula: see text]g/L) and silicates (Na2SiO3 18[Formula: see text]g/L), respectively. It was found that the coating formed in borates-containing electrolyte was of compact and smooth structure than that of the one formed in silicates-containing electrolyte at the optimum treatment time. It was found that all the coatings were composed of á-Al2O3 and ã-Al2O3. The microhardness and wear tests proved that the coating formed in borates-containing electrolyte was having better mechanical properties than those of the coating formed in silicates-containing electrolyte.

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Methodology Applied for Thickness Selection and Stored Heat Evaluation in Non-producer Geothermal Wells in Order to Its Investment Rescue

Current Journal of Applied Science and Technology ◽

10.9734/cjast/2020/v39i1930796 ◽

2020 ◽

pp. 91-111

Author(s):

Alfonso Aragon- Aguilar ◽

Georgina Izquierdo- Montalvo ◽

Dominic A. Becerra- Serrato ◽

Victor M. Monrroy- Mar

Keyword(s):

Electric Energy ◽

Geothermal Field ◽

Geothermal Systems ◽

Drainage Radius ◽

Heterogeneous Behavior ◽

Water Recharge ◽

Geothermal Wells ◽

Using Data ◽

Heat Calculation ◽

Heat Store

An assessment methodology of stored heat in rock formation surrounding to wellbore in geothermal systems is shown. Due to geothermal systems generally are nested in volcanic rock, it is characteristic its heterogeneous behavior. Proposed methodology starts since zone selection with possibilities of heat store. This methodology is focused to be applied in geothermal reservoirs with tendency to production decline, due to low permeability and unbalance between exploitation and water recharge. Because the high costs of drilling geothermal wells, methodology shown in this work is proposed to be applied in those with production decline or non-producers, in order to rescue its investment. The objective is to select the thickness with heat, evaluate its storage, design the appropriate instrumentation for its recovery, its energy conversion and rescue its investment done. The different designs for energy recovery using non-conventional methods to those, used habitually are reviewed. Each one of the variables for stored heat calculation was determined using technical tools of reservoir engineering. A parametric analysis about variables sensitivity (porosity and drainage radius) for determining thermal energy and corresponding electric energy of analyzed rock volume is done. Practical application of this methodology was carried out using data of one of wells of Los Humeros Mexican geothermal field.

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