A modular heating system of a solar phase-change energy storage heating ventilation partition wall, comprising a solar air collector (13), phase-change heat storage units (23) arranged modularly, and a partition wall, to achieve energy storage and heating, and the partition wall consisting of a solid partition wall (1), a thermal insulation layer (2), a decoration layer (3), frame of steel reinforcement (4), reflecting layers (5) and phase-change heat storage modules (6), wherein an internal air channel (7) is further arranged in each of the phase-change heat storage modules (6);
- the phase-change heat storage modules (6) are fixedly installed on the frame of steel reinforcement (4), and each phase-change heat storage unit (23) comprises a plurality of phase-change heat storage subunits (231);
- each phase-change heat storage subunit (231) consists of a plurality of meshed phase-change heat storage modules, and the phase-change heat storage subunits (231) are connected in parallel;
- wherein:
- a top and a bottom of each of the phase-change heat storage units (23) are correspondingly connected with a fourth air valve (15), a fifth air valve (16), a sixth air valve (17), a seventh air valve (18), an eighth air valve (19), a ninth air valve (20), a tenth air valve (21) and an eleventh air valve (22) to form an air inlet at the top and a ventilation port at the bottom of each of the phase-change heat storage units respectively;
- the phase-change heat storage units (23) are connected with a return air inlet of the solar air collector (13) through the third air valve (14), and connected with an air outlet of the solar air collector (13) through an axial flow fan (10) and a second air valve (12);
- hot air in the solar air collector (13) enters the phase-change heat storage units (23) from the tops thereof and return from the bottoms thereof;
- a first air valve (11) arranged on a bypass line is located between the second air valve (12) and the axial flow fan (10), and hot air in air ducts is communicated with indoor air by opening the first air valve (11);
- customized three-way or four-way valves are sealing connected with reserved connectors on tops and bottoms of the phase-change heat storage modules (6), the internal air channels (7) are connected with other phase-change heat storage units by the air ducts in parallel, and the air ducts after parallel connection are connected to the solar air collector;
- the system has three working conditions of daytime energy storage, natural convection heat transfer and heat release by forced ventilation:
- daytime energy storage:
- when weather conditions are good during the daytime, air in the solar air collector warms up, the second air valve and the third air valve are opened, and the fourth air valve, the fifth air valve, the sixth air valve, the seventh air valve, the eighth air valve, the ninth air valve, the tenth air valve, the eleventh air valve and the first air valve are closed;
- the axial flow fan is turned on;
- the high-temperature air in the solar air collector is compressed by the axial flow fan to store energy and provide heat for the phase-change heat storage modules in the solid partition wall;
- low-temperature air after heat exchange returns to the solar air collector from the bottoms of the phase-change heat storage units for circulation;
- natural convection heat transfer:
- when the indoor air temperature begins to drop at night, the first air valve, the second air valve and the third air valve are closed, the fourth air valve, the fifth air valve, the sixth air valve, the seventh air valve, the eighth air valve, the ninth air valve, the tenth air valve and the eleventh air valve are opened, and the axial flow fan is turned off;
- at this moment, air in the internal channels of the phase-change heat storage units in the solid partition wall is heated to rise naturally, and indoor cold air enters the phase-change heat storage units through the ventilation ports at the bottoms of phase-change heat storage units in the solid partition wall to heat the room through natural convection;
- and
- heat release by forced ventilation:
- when the heat provided for the room through natural convection is limited, the fourth air valve, the fifth air valve, the sixth air valve, the seventh air valve, the second air valve and the third air valve are closed, and the eighth air valve, the ninth air valve, the tenth air valve, the eleventh air valve and the first air valve are opened;
- the axial flow fan is turned on, and therefore the room is heated by the high-temperature air in the phase-change heat storage units in the solid partition wall through the ventilation ports at the bottoms of the phase-change heat storage units;
- and cold air at the top of the room is fed into the phase-change heat storage units in the solid partition wall to be heated and forcibly cycled for heating the room.