NOVELTY - The system (100) has a ground-based solar energy receiver (106) adapted to contain a solar absorption material i.e. semi-transparent phase change material, for converting solar energy into heat. A set of hillside-mounted heliostats (102) directly reflects impinging solar radiation without reflecting into an interior of the receiver through an inlet aperture (112). The phase-change material in a liquid form includes a molten salt selected from a group of chloride, fluoride, carbonate and nitrite salts. The phase change material has hydroxide for reducing generation of hydrochloric acid.    USE - Small-scale concentrated solar power system for concentrating and storing solar energy at high temperature in a fluid-filled receiver i.e. ground-based solar energy receiver, to generate electricity by utilizing a solar energy conversion system (claimed).    ADVANTAGE - The system has the receiver utilizing the molten salt withstanding temperatures exceeding 1000 degree Celsius without decomposition of the salt, thus facilitating efficient and high-density solar-to-thermal energy conversion and high-density thermal energy storage. The salt has a heat capacity in between a peak receiver temperature and a power cycle temperature to store energy for a power cycle when sunshine is absent, thus increasing overall system efficiency. The system uses a high-temperature storage medium allowing a heliostat array to concentrate large amounts of solar energy in the receiver, thus improving energy efficiency of the system. The system facilitates usage of robust and continuous power supply at low capital cost.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for the following:    (1) a solar energy conversion system comprising a heat exchanger adapted to transfer thermal energy from liquefied solar absorption material to a working fluid    (2) a method for generating energy using a concentrated solar power system.    DESCRIPTION OF DRAWING(S) - The drawing shows a side view of a small-scale concentrated solar power system including a set of hillside-mounted heliostats and a ground-based energy receiver at a base of a hill.    Small-scale concentrated solar power system (100)    Hillside-mounted heliostats (102)    Ground-based solar energy receiver (106)    Receiver cover (110)    Inlet aperture (112)