Novel design of central dual-receiver for solar power tower

Abstract

A novel dual-receiver with a surrounding solar field was proposed to improve the efficiency of solar power tower (SPT). The new design combined an external and a cavity receiver, corresponding to the boiling and superheating sections respectively, and provided a simple yet controllable heat flux distribution on both sections. A case study of a 11MW solar power plant was conducted. It was demonstrated that the present dual-receiver could produce superheat steam of 515ºC and 10.7MPa at the solar heat absorbing efficiency of 86.55%. By considering various heat losses, the surface heat flux, the surface temperature, as well as the heat transfer fluid distributiuon were obtained for the dual-receiver. A comparison with two external cylindrical receivers showed that the present design could improve the global thermal efficiency by 3.2%. Off-design performance of the dual-receiver was obtained, which indicated that the plant performance was affected significantly by the incident solar fluxes at different time of a day. The influence of heat transfer tube size suggested that an optimized tube diameter for the superheating section of the present dual-receiver should be used. .

Concentrating Solar Power Advances in Geometric Optics, Materials and System Integration

“…Naturally, the flux will fluctuate depending on passing clouds from 29 kW/m 2 /s corresponding to power gradients of 1.7 MWth/s [82]. Dual receivers have also been reported [83,84], however benefits should compensate for the added complexity. Higher temperatures can be achieved in particle receivers.…”

Energy analysis of a particle suspension solar combined cycle power plant

“…For an isentropic turbine, the related output enthalpy is found for the steam tables [63]. The output enthalpy of the turbine can be calculated using equation (19), and subsequently used for calculating the theoretical power generated by the steam turbine (equation 20). The real power depends on the mechanical and electrical efficiency of the turbine.…”

“…The total efficiency of the turbine is given by equation (22), using the amount of heat loss by the air and hence also taking the efficiency of the boiler into account. The flow rate of steam does not influence the efficiencies because it cancels out in equations (19) and (20). The power will however be influenced by the mass flow of steam.…”

Data on combination of parabolic solar system with CH4 cycle and power tower solar system with Cu–Cl cycle for hydrogen production in the city of Ghardaia (Algeria)

“… Thermal solar technology for hydrogen production Energy efficiency Temperature Solar parabolic trough collector system [2] . 42.21% >826.85 Power tower [1] . 86.55% 515 °C …”