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Horticultural composite phase change pipe and preparation method thereof

A technology of composite phase change and inorganic phase change materials, which is applied in the field of horticultural composite phase change pipes and its preparation, can solve the problems of supercooling humidity sensitivity and unfavorable application, achieve low price, improve supercooling and phase change separation, The effect of avoiding the risk of leakage

Inactive Publication Date: 2010-07-21
NORTHWEST A & F UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CaCl 2 ·6H 2 O has good heat storage, energy saving and dehumidification effects, but at the same time CaCl 2 ·6H 2 O has serious supercooling problems (its supercooling degree reaches 20 ℃) ​​and sensitivity to humidity, which is not good for application

Method used

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  • Horticultural composite phase change pipe and preparation method thereof
  • Horticultural composite phase change pipe and preparation method thereof
  • Horticultural composite phase change pipe and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The horticultural composite phase change pipe prepared in this embodiment specifically includes the following steps:

[0035] Step 1: Inorganic phase change material formulation

[0036] Mix the following inorganic phase change materials by mass ratio:

[0037] Na 2 SO 4 : 8.8%, Na 2 HPO 4 12H 2 O: 74%, CaCl 2 : 2.5%, H 2 O: 13.6%, borax (Na 2 B 4 o 7 10H 2 O): 1%, CMC: 0.1%; hereinafter referred to as formula-1.

[0038] Step 2: Heat the inorganic phase change hybrid material to 70°C, and then let it become liquid; stir fully during the heating process to make it a saturated solution;

[0039] Step 3: Use liquid filling equipment to encapsulate the saturated solution with polyethylene pipes. During the encapsulation process, the actual pipe diameter and length of the encapsulation need to be adjusted according to the different building wall bearing capacity and the required heat load. Generally, 0.3m each 3 Left and right, get horticultural composite phase ...

Embodiment 2

[0046] The horticultural composite phase change pipe prepared in this embodiment comprises the following steps:

[0047] Step 1: Inorganic phase change material formulation

[0048] Mix the following inorganic phase change materials by mass ratio: Na 2 SO 4 : 8.8%, Na 2 HPO 4 12H 2 O: 72%, CaCl 2 : 3.5%, H 2 O: 14.6%, borax (Na 2 B 4 o 7 10H 2 O): 1%, CMC: 0.1%; hereinafter referred to as blend-2.

[0049] Step 2: Heat the inorganic phase change hybrid material to 70 degrees Celsius, and then let it become liquid; stir fully during the heating process to make it a saturated solution;

[0050] Step 3: Use liquid filling equipment to encapsulate the saturated solution with polyethylene pipes. During the encapsulation process, the actual pipe diameter and length of the encapsulation need to be adjusted according to the different building wall bearing capacity and the required heat load. Generally, 0.3m each 3 Left and right, get horticultural composite phase change p...

Embodiment 3

[0057] The horticultural composite phase change pipe prepared in this embodiment comprises the following steps:

[0058] Step 1: Inorganic phase change material formulation

[0059] Mix the following inorganic phase change materials by mass ratio: Na 2 SO 4 : 10.6%, Na 2 HPO 4 12H 2 O: 72%, CaCl 2 : 1.5%, H 2 O: 14.9%, borax (Na 2 B 4 o 7 10H 2 O): 1%; hereinafter referred to as blend-3.

[0060] Step 2: Heat the inorganic phase change hybrid material to 70 degrees Celsius, and then let it become liquid; stir fully during the heating process to make it a saturated solution;

[0061] Step 3: Use liquid filling equipment to encapsulate the saturated solution with polyethylene pipes. During the encapsulation process, the actual pipe diameter and length of the encapsulation need to be adjusted according to the different building wall bearing capacity and the required heat load. Generally, 0.3m each 3 Left and right, a horticultural composite phase change pipe is obtai...

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Abstract

The invention discloses a horticultural composite phase change pipe and a preparation method thereof; the prepared horticultural composite phase change pipe takes inorganic phase change material as the main material and is sealed in a polyethylene pipe; and the inorganic phase change material is prepared from the inorganic phase change material in percentage by mass: 8.8 to 10.6 percent of Na2SO4, 72 to 74 percent of Na2HPO4.12H2O, 1.5 to 3.5 percent of CaC12, 1 percent of Na2B4O7.10H2O, 0 to 1 percent of CMC and the balance water, and the sum of the percentage of the inorganic phase change material is 100 percent. The preparation method comprises the following steps that: the inorganic phase change material is prepared and mixed according to different phase change temperature and latent heat requirements; and then the mixed inorganic phase change main material is inorganically heated to the temperature which exceeds the phase change temperature, and then the material is changed into liquid state; the liquid material becomes saturated solution; liquid filling equipment seals the saturated solution with the polyethylene pipe; and when in sealing, the actual pipe diameter and the length of sealing is adjusted according to the bearing capability of different building walls and the required heat load, and the horticultural composite phase change pipe is prepared.

Description

technical field [0001] The present invention relates to the field of building energy-saving materials, and relates to energy-saving thermal insulation materials used in the field of horticultural production, in particular to a horticultural composite phase-change pipe and a preparation method thereof. The horticultural composite phase-change pipe prepared in the present invention uses composite inorganic phase-change materials as The main material is packaged with polyethylene pipes and installed inside the greenhouse building. The horticultural composite phase change pipes are suitable for the growth of indoor plants under sufficient light conditions, and are suitable for meeting the requirements of most horticultural crops for the optimum growth temperature. . Background technique [0002] Utilizing the characteristics of substances absorbing or releasing energy in the process of solid-liquid and solid-solid phase transitions, temporarily unused energy can be stored and re...

Claims

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Application Information

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IPC IPC(8): C09K5/06F16L9/14
Inventor 张勇邹志荣陈红武
Owner NORTHWEST A & F UNIV
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