In the present study, a numerical investigation of concave surface cavity receiver of non-imaging solar concentrator is carried out considering various operating and geometrical parameters such as mass flow rate of the fluid, solar radiation and receiver configuration. The fluid outlet temperature, pressure drop across the coil for different receiver configurations are studied along with the heat loss estimation of concave cavity surface receiver for non-imaging concentrating collector. The convective and radiative heat loss from the receiver surface is calculated based on 3-D numerical simulations. For helical receiver, the temperature rise is found to be 30°C (0.5kg/min) and 17°C (1kg/min) respectively; whereas for helical-spiral receiver, the temperature rise is found to be 27°C (0.5 kg/min) and 15°C (1 kg/min). The pressure drop across the coil ranges between 1kPa to 14kPa for different mass flow rate and solar radiation for two configurations of the receiver. The present model can be used for estimating the heat transfer and fluid flow characteristics of helical receiver for EHC. © 2016. The Authors. Published by International Solar Energy Society.