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Definition sketch of the V-notch weir (after Bos, 1976) í µí± í µí±í µí±¡í µí± = 8 15 2í µí± * í µí¼ 2 * í µí° ¶ í µí± * ℎ í µí±¢ + í µí± ℎ 2.5 * í µí¼ … … … … (11) Where : W atm : Water Mass Rate (kg/s) C e : Effective Free Flow discharge coefficient (m 0.5 ) h u : Water Head Measurement (m) k h : Head Correction (m) í µí¼ : Central Angle of V-notch (m) g : The Gravity Force (m/s 2 ) The effective discharge coefficient (C e ), and the head correction (k h ), both are functions of notch angle (í µí¼).
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![Figure 1. Longitudinal Section, Flow Over a Sharpcrested Weir [1]](profile/Ali-Ashat/publication/332060750/figure/fig1/AS:741485939011598@1553795432780/Longitudinal-Section-Flow-Over-a-Sharpcrested-Weir-1_Q320.jpg)
To assess a two-phase well capacity in early well testing stage, James Lip Pressure for horizontal discharge is generally applied. The objective of the measurement is to calculate total mass flow rate and enthalpy in order to estimate well capacity. During measurement, two-phase fluid from well is directed horizontally to silencer (atmospheric sepa...
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Context 1
... designed angle could range from 20 o -100 o . For standard application, 90 o Vnotch is commonly used as shown in Figure 6. The general equation for water flow rate calculation at any angle is: In field application, the simplified equation is commonly used by assuming C e = 0.578 m 0.5 and water temperature 98 o C, while k h value is ignored. ...
Citations
... Ji (2007) and Ramamurthy et al. (2013) experimentally investigated TPWs with several triangular notches. A comparison of TPWs with rectangular, trapezoidal and triangular notches, supplemented with measurement error determination, was performed by Martikno et al. (2013). Chanson and Wang (2012; investigated the calibration of TPWs with a triangular notch under unsteady flow. ...
The paper deals with the determination of the discharge coefficient, effective head and newly the limit head in the Kindsvater-Shen formula for the determination of a relatively small discharge of clear water using a thin-plate weir with a triangular notch. The determination of the discharge coefficient, effective head and limit head is based on extensive experimental research and is verified by previous measurements by other authors. The experimental research was characterised by a large range of notch angles (from 5.25° to 91.17°), weir heights (from 0.00 m to 0.20 m), and water temperatures (from 15 °C to 45 °C), as well as a focus on relatively small heads (from 0.02 m to 0.18 m), which is where the strengths of the Kindsvater-Shen formula stand out. The experimental research supplemented existing knowledge about the overflow occurring with small heads and small weir notch angles. The newly determined dependencies in the Kindsvater-Shen formula extended its applicability to weirs with small notch angles and newly enabled the determination of the limit head, which restricts its applicability in the determination of small discharges.
... The discharge was started on day 43. Calculation on production parameters with James lip method has been validated by PTS flowing and TFT result, leading to weirbox height calibration by adding +1.5 cm to the field data reading [6]. The resulting discrepancy on calculated enthalpy is 5% and 6% on total mass flow. ...
This paper describes the implementation of comprehensive well testing programs during the 2014-2015 exploration drilling in Rantau Dedap Geothermal Field. The well testing programs were designed to provide reliable data as foundation for resource assessment as well as useful information for decision making during drilling. A series of well testing survey consisting of SFTT, completion test, heating-up downhole logging, discharge test, chemistry sampling was conducted to understand individual wells characteristics such as thermodynamic state of the reservoir fluid, permeability distribution, well output and fluid chemistry. Furthermore, interference test was carried out to investigate the response of reservoir to exploitation.
