Division 4.1.11 Calculation of TC characteristics

For each measurement point, the following calculations shall be applied to the measurement data:

• The torque ratio of the TC shall be calculated by

  $$\mu =\frac{T_{\mathrm{c,tur}}-{\mathrm{\Delta U}}_{\mathrm{T,tur}}}{T_{\mathrm{c,pum}}+{\mathrm{\Delta U}}_{\mathrm{T,pum}}}$$

• The speed ratio of the TC shall be calculated by

  $$v=\frac{n_{\mathrm{tur}}}{n_{\mathrm{pum}}}$$

• The reference torque at 1 000 rpm shall be calculated by

  $$T_{\mathrm{pum}1000}=\left(T_{\mathrm{c,pum}}-{\mathrm{\Delta U}}_{\mathrm{T,pum}}\right)\times {\left(\frac{1000\mathrm{rpm}}{n_{\mathrm{pum}}}\right)}^2$$

where: