Control method and device for phase-change energy storage type cold and heat combined supply system with multi-heat source heat pump

A control method for a phase-change energy storage type cold and heat combined supply system with a multi-heat source heat pump, wherein the phase-change energy storage type cold and heat combined supply system comprises a solar panel, a water source, an air source, a geothermal source, and a phase change material, and wherein the multi-heat source heat pump are selected from solar energy in combination with one or more of the water source, the air source, and the geothermal source, the control method comprises the following steps of:

• step a:
• recording the temperature of the solar panel at a certain moment as tt, the temperature of the water source to be taken as ts, the temperature of the geothermal source as td, the temperature of the air source as tk, and the temperature of the phase change material before heat storage as t1, the temperature of the phase change material of the heat pump system after heat storage only under the solar energy in combination with the water energy as t2, the temperature of the phase change material of the heat pump system after heat storage only under the solar energy in combination with the air source as t3, and the temperature of the phase change material of the heat pump system after heat storage only under the solar energy in combination with the ground source as t4;
• step b:
• calculating heat storage efficiencies ζs, ζk and ζd of the phase change material respectively under the solar energy in combination with the water energy, under the solar energy in combination with the air source, and under the solar energy in combination with the ground source, specifically:
• ζ
• s
• =
• ρ
• 1
• ⁢
• ❘
• "\[LeftBracketingBar]"
• t
• 2
• -
• t
• 1
• t
• t
• -
• t
• s
• ❘
• "\[RightBracketingBar]"
• ζ
• k
• =
• ρ
• 2
• ⁢
• ❘
• "\[LeftBracketingBar]"
• t
• 3
• -
• t
• 1
• t
• t
• -
• t
• k
• ❘
• "\[RightBracketingBar]"
• ζ
• d
• =
• ρ
• 3
• ⁢
• ❘
• "\[LeftBracketingBar]"
• t
• 4
• -
• t
• 1
• t
• t
• -
• t
• d
• ❘
• "\[RightBracketingBar]"
• wherein, ρ1, ρ2, and ρ3 are respectively referred to as a water source heat regulation coefficient, an air source heat regulation coefficient, and a geothermal source heat regulation coefficient;
• step c:
• calculating an hourly heat storage capacity of the multi-heat source heat pump Qrb according to the following formula:
• Q
• r
• ⁢
• b
• =
• ζ
• s
• (
• n
• s
• ⁢
• p
• s
• ⁢
• Q
• p
• ′
• )
• +
• ζ
• k
• (
• n
• k
• ⁢
• p
• k
• ⁢
• Q
• w
• ′
• )
• +
• ζ
• d
• ⁢
• I
• γ
• (
• n
• d
• ⁢
• p
• d
• ⁢
• Q
• r
• ′
• )
• +
• Q
• W
• ⁢
• A
• wherein ns is the number of water intake pipes, ps is a flow area per water collecting pipe, and Q′p is a normalized hourly heat collecting capacity per unit flow area for the water source;
• nk is the number per gas collecting pipe, pk is an effective gas collecting area of the gas collecting pipes, and Q′w is a normalized hourly heat collecting capacity per unit effective gas collecting area for the air source;
• nd is the number of geothermal source collection devices, pd is an effective heat collecting area per geothermal source collection device, Iγ is a solar radiation intensity, Q′r is a normalized hourly ground heat collecting capacity per unit effective heat collecting area for the ground source;
• QWA is an hourly heat output of the heat pump;
• and
• comparing the calculated hourly heat storage capacity of the multi-heat source heat pump Qrb with a total hourly heat consumption of the system Qtol, and if Qrb<1.45 Qtol, regulating use of various heat sources through a heat storage integrated regulation system until Qrb≥1.45 Qtol.