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Heat Transfer

Log Mean Temperature Difference Calculator

Use our online Log Mean Temperature Difference Calculator: LMTD Formula: LMTD = [ΔT1- ΔT2]/[lnΔT1 / lnΔT2 ] where ΔT1 and  ΔT2 as defined below for the LMTD counter-current flow and LMTD parallel flow: LMTD Counter-current flow exchanger LMTD Parallel flow Exchanger  We used the equations shown above in our calculator Log Mean Temperature Difference Calculator. Why…

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Heat Transfer

Prandtl Number Calculator

Prandtl Number Calculator Use our online Prandtl Number Calculator: Prandtl Number Equation The Prandtl Number (Pr) called also Prandtl group is a dimensionless number, introduced by the physicist Ludwig Prandtl. The Prandtl Number equation/formula is the ratio of two transport properties, the kinematic viscosity and the thermal diffusivity. The first propritie affect the the velocity…

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pump sizing calculators

Suction Specific Speed Calculator at BEP – Online Calculator

Online Suction Specific Speed Calculator at Best Efficiency point . Suction Specific Speed at BEP Formulas: Imperial Units: Ns = ( N  *  (Q)1/2 ) / (NPSH)3/4. where: Ns = specific speed. N = pump speed, rpm. Q = flow, gpm. NPSH = net positive suction head, ft. Values are taken at best efficiency point (BEP). Pump flow is…

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pump sizing calculators

Pump Specific Speed Calculator

Online Pump Specific Speed Calculator at Best Efficiency point . Pump Specific Speed  at Best Efficiency Point Formulas: Imperial Units: Ns = ( N  *  (Q)1/2 ) / (H)3/4. where: Ns = specific speed. N = pump speed, rpm. Q = flow, gpm. H = head, ft. Values are taken at best efficiency point (BEP). Pump flow is taken…

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pump sizing calculators

Fluid Velocity Calculator – Pipe Line Velocity Calculator

Online Fluid Velocity Calculator. Fluid Velocity Formulas: Imperial Units: V = ( 0.409 * Q ) /  d2. where: V = velocity, ft/s. Q = flow, gpm. d = pipe inside diameter, in. SI Units: V = ( 354 * Q ) /  d2. where: V = velocity, m/s. Q = flow, m3/h. d = pipe…

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pump sizing calculators

Pump Temperature Rise Calculator – Online Calculator

Online Pump Temperature Rise calculator. Pump Temperature Rise Formulas: Imperial Units: ΔT = (H * (1 – η ) )/(778 * U* η). where: ΔT = temperature rise, °F. H = total head, ft. η = pump efficiency, decimal. U = fluid specific heat, BTU/(lbm-°F). SI Units: ΔT = (H * (1 – η ) )/(102 * U* η). where:…