NOVELTY - A phase change solar energy storage heater (1) comprises solar energy collector consisting of reflecting plate (3) set up with vacuum tubes (2) with 1 end of each tube inserted into phase change energy storage heater connected with heat exchanger coil and heat conducting pipe, supporting phase change thermal storage heater, solar energy collector bracket (4), insulating box body installed with heat conducting pipe and heat exchanger coil, and phase change energy storage material in which remaining empty space is filled with insulation.    USE - A phase change solar energy storage heater for biodiesel oil production (claimed).    ADVANTAGE - Phase change solar energy storage heater reduces non-regenerative energy consumption.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for:    (1) a system producing biological diesel oil which comprises phase change solar energy storage heater, oil storage container, biodiesel oil device, circulating pump, control device, and solar energy power supply, where phase change solar energy storage heater heats oil feedstock, oil storage container with liquid level gauge and thermometer is installed with 2 inlet ports and 2 outlet ports, in which inlet port 1 is for feeding unheated raw oil, inlet port 2 installed with solenoid valve type 131 is connected to phase change solar energy storage heater and heat exchanger coil, outlet port 1 for heated oil output which meets temperature requirements is connected to circulating pump which is connected to phase change solar energy storage heater and heat exchanger coil, and outlet port 2 is installed with solenoid valve type 132 which is connected with the 1st inlet port, control device which is connected to 1st inlet port receives signal from liquid level gauge and thermometer in oil storage tank, in which liquid level gauge signals solenoid valve type 131 whether to open or close feeding of unheated oil and circulating pump operates according to temperature signal which signals solenoid valve type 132 which controls whether to discharge heated oil, and solar energy power supply which controls production of biodiesel by operating biodiesel oil device, circulating pump, and control device by introducing oil to oil storage tank, heating, and circulating;    (2) producing biological diesel oil using solar energy which involves starting solar energy power supply and controlling device, transporting unheated oil to oil storage tank using circulation pump, heating component to 50-70 degrees C, shutting down circulating pump after meeting temperature requirements of processed material, sending to biodiesel oil device and opening oil storage tank using solenoid valve 132, adding methanol and calcium oxide as catalyst to biodiesel oil device in which mole ratio methanol:unheated oil is 6:1 and mass of calcium oxide is 2-6% of unheated oil, reacting and stirring components under atmospheric pressure at 50-70 degrees C for 3-6 hours, and separating glycerol to obtain biodiesel oil; and    (3) preparation of catalyst used for producing biodiesel oil through solar energy involves calcining calcium hydroxide under normal pressure at 700-900 degrees C for 1-2 hours, cooling to room temperature, and grinding and sieving to 80-mesh screen.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of a phase change solar energy storage heater.    Phase-transition energy-accumulating heater (1)    Vacuum tube (2)    Reflecting plate (3)    Bracket (4)