Forced flow and convective melting heat transfer of clathrate hydrate slurry in tubes

Ma, Zhiwei; Zhang, P.; Wang, Ruzhu; Furui, Shuji; Xi, Guannan

doi:10.1016/j.ijheatmasstransfer.2010.04.025

Cited by 108 publications

(42 citation statements)

References 25 publications

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“…Two different hydrates with different hydration numbers were observed, and the corresponding thermo-physical properties have been summarized by Ma et al [6], as shown in Density of TBAB aqueous solution was measured using a balance (FS: 2200g, accuracy: 0.01 g) and a graduated flask (FS: 50 mL, accuracy: 1 mL), while the heat capacity was measured based on the heat balance with water in a plate heat exchanger. Thereafter, these properties of TBAB CHS can be calculated by the corresponding values of TBAB solution we measured and that of TBAB hydrate crystal given in Table 1.…”

Section: Basic Thermo-physical Properties Of Tbab Chsmentioning

confidence: 99%

“…[1,2], and they also applied it to a real application [3]. Hayashi et al [1], Darbouret et al [4], Xiao et al [5] and Ma et al [6] all investigated the flow characteristics of TBAB CHS in straight tubes, nevertheless, the results reported were divergent. Moreover, Ma et al [6] reported the forced convective heat transfer characteristics.…”

Section: Introductionmentioning

confidence: 99%

“…Hayashi et al [1], Darbouret et al [4], Xiao et al [5] and Ma et al [6] all investigated the flow characteristics of TBAB CHS in straight tubes, nevertheless, the results reported were divergent. Moreover, Ma et al [6] reported the forced convective heat transfer characteristics. However, the application of TBAB CHS is still limited by the deficient studies, and the performance in an air-conditioning system is rarely reported.…”

Section: Introductionmentioning

confidence: 99%

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Performance of A Cold Storage Air-Conditioning Aystem Using Tetrabutylammonium Bromide Clathrate Hydrate Slurry

Zhang

Wang

2011

Linköping Electronic Conference Proceedings

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Abstract:A cold storage air-conditioning system was built to investigate the energy saving effect of using tetrabutylammonium bromide (TBAB) clathrate hydrate slurry (CHS) as cold storage medium, the corresponding COP during TBAB CHS generation and the pumping power during the cold release were measured. As the increase of the TBAB CHS mass fraction during the generation, the system COP generally decreased from about 1.92-2.95 to about 1.05-1.49, depending on TBAB CHS flow rate. To clarify the performance of this system, several cold storage strategy cases are studied, the corresponding electric power consumption and the cost saving, compared with water as the cold transportation medium, are shown in this work as well.

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Section: Basic Thermo-physical Properties Of Tbab Chsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Performance of A Cold Storage Air-Conditioning Aystem Using Tetrabutylammonium Bromide Clathrate Hydrate Slurry

Zhang

Wang

2011

Linköping Electronic Conference Proceedings

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“…Ma et.al. (2010) using tributhyl ammonium bromide (TBAB) also had higher viscosity and density compared to water [5]. Besides that, the use of PCM also has an impact in the increase in pressure drop.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Flow Characters of Salt Hydrate Slurry in Phase Change Temperature Range

Irsyad¹,

Indartono²,

Pasek³

et al. 2017

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Abstract.One of the efforts in minimizing energy consumption chiller type air conditioning system is the use of phase changing material in secondary refrigerant. Secondary refrigerant functions to obtain heat from the air to cool a room and to release heat in chiller evaporator. Based on working temperature of secondary refrigerant, the fluid can flow in liquid form, and can also be in fluid solid form or slurry at the temperature of its phase change. This research studies the effect of temperature toward flow characteristics, with the parameter analyzed being the pressure decrease and friction coefficient. Besides that, in order to support data analysis, it was initiated by viscosity testing, density and concentration of solid mass. Data taken were viscosity, density, solid mass concentrate, and pressure difference found in copper pipe. Data were taken for several fluid temperatures, and at pressure decrease was added by variation of flow speed. Hydrate salt tested were CaCl2 and Na2HPO4. Viscosity and density increased with the decrease in temperature. The formation of solid particles within phase change temperature range also gave an impact on the increase in the value of viscosity and density. Pressure drop increased when using hydrate salt fluid. The use of CaCl2 solution resulted in the highest pressure decrease. This salt hydrate has far higher viscosity and density compared to water. This has an effect toward an increase in pressure drop. This increase started to be significant in the phase change temperature area in which solid particle started to form. The same thing happened in the friction coefficient value.

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“…In addition, the particles agglomerate and disperse in the slurry, imparting non-Newtonian characteristics to the slurry. [5][6][7][8][9] To increase slurry fluidity, the addition of surfactants that form drag-reducing rod-like micelles [10][11][12][13][14][15] , polymers 3,16) , and some types of brines 1,9,17,18) have been tested to prevent particle agglomeration. These additives also enhance the non-Newtonian behavior of the slurries.…”

Section: Introductionmentioning

confidence: 99%

Crystal Growth and Viscosity Behaviors of Ammonium Alum Hydrate Solution with PVA in Shear Flow

Toyoda

Hidema

Suzuki

et al. 2014

J. Soc. Rheol., Jpn

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Forced flow and convective melting heat transfer of clathrate hydrate slurry in tubes

Cited by 108 publications

References 25 publications

Performance of A Cold Storage Air-Conditioning Aystem Using Tetrabutylammonium Bromide Clathrate Hydrate Slurry

Performance of A Cold Storage Air-Conditioning Aystem Using Tetrabutylammonium Bromide Clathrate Hydrate Slurry

Experimental Study on Flow Characters of Salt Hydrate Slurry in Phase Change Temperature Range

Crystal Growth and Viscosity Behaviors of Ammonium Alum Hydrate Solution with PVA in Shear Flow

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