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We constrain cosmological parameters using only Hubble parameter data andquantify the impact of future Hubble parameter measurements on parameterestimation for the most typical dark energy models. We first constraincosmological parameters using 52 current Hubble parameter data including theHubble constant measurement from the Hubble Space Telescope. Then we simulatethe baryon acoustic oscillation signals from WFIRST (Wide-Field Infrared SurveyTelescope) covering the redshift range of $z\in [0.5, 2]$ and the redshiftdrift data from E-ELT (European Extremely Large Telescope) in the redshiftrange of $z\in [2,5]$. It is shown that solely using the current Hubbleparameter data could give fairly good constraints on cosmological parameters.Compared to the current Hubble parameter data, with the WFIRST observation the$H(z)$ constraints on dark energy would be improved slightly, while with theE-ELT observation the $H(z)$ constraints on dark energy is enormously improved.

Prospect for cosmological parameter estimation using future Hubble parameter measurements