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  1. INDEX:組織別
  2. 農研機構 野菜花き研究部門
  3. 研究報告
  4. 野菜茶研研報
  5. 10号

トマト栽培温室における空気熱源式ヒートポンプの冷房運転の動作特性とマルチによる夜間冷房負荷軽減効果

https://doi.org/10.24514/00001714
https://doi.org/10.24514/00001714
767662c4-02cf-4acb-a6ea-c41b575aafb2
名前 / ファイル ライセンス アクション
nivts_report_No10p95-104p.pdf nivts_report_No10p95-104p.pdf (1.4 MB)
Item type 紀要論文01 / Departmental Bulletin Original Article(1)
公開日 2019-03-22
タイトル
タイトル トマト栽培温室における空気熱源式ヒートポンプの冷房運転の動作特性とマルチによる夜間冷房負荷軽減効果
タイトル
タイトル Performance of Air-to-Air Heat Pump for Tomato Greenhouse Cooling and Reduction of Night-time Cooling Load by Mulch to Control Soil Heat Flux
言語 en
言語
言語 jpn
資源タイプ
資源タイプ識別子 http://purl.org/coar/resource_type/c_6501
資源タイプ departmental bulletin paper
ID登録
ID登録 10.24514/00001714
ID登録タイプ JaLC
著者 川嶋, 浩樹

× 川嶋, 浩樹

川嶋, 浩樹

ja-Kana カワシマ, ヒロキ

en KAWASHIMA, Hiroki

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高市, 益行

× 高市, 益行

高市, 益行

ja-Kana タカイチ, マスユキ

en TAKAICHI, Masuyuki

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安場, 健一郎

× 安場, 健一郎

安場, 健一郎

ja-Kana ヤスバ, ケンイチロウ

en YASUBA, Ken-ichiro

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抄録
内容記述タイプ Abstract
内容記述 We tested the performance of an air-to-air heat pump (HP) for both daytime and night-time cooling of a tomato greenhouse, and we investigated the effect of mulch on the night-time cooling load. After 1-1.5 h, when the power consumption of the HP became constant, the inside and soil temperatures were lowest in the treatment with flash-spun mulch (Dupont Tyvek), as the mulch decreased the soil heat flux (Q_s). The range of reductions in Q_s, enthalpy (h_in), absolute humidity, and relative humidity were largest in the white-black mulch (WB) treatment when the HP power consumption had stabilized. The differences in the enthalpy (△h_hp) and the absolute humidity between the outlet and inlet of the HP decreased in the order of Tyvek > white-black mulch (WB) > control, but the difference in the inside temperature decreased in the order of WB > control > Tyvek. Before cooling started, the soil temperature and Q_s decreased in the order of Tyvek > WB > control. Q_s was almost constant during the daytime in the mulch treatments. The mulch seemed to stop the daytime rise in soil temperature and the night-time Q_s from the soil to the greenhouse, thus reducing the night-time cooling load. The power consumption of the HP during cooling rose moderately as △h_hp increased and rose sharply when △h_hp exceeded about 14 kJ・kg'^1. Under continuous operation of the HP, the inside temperature and h_in were maintained at about 23℃ (cooling set point) and 58 kJ・kg'^1, respectively, when Q_s was between about -20 and -40 W・m^2 and solar radiation was between about 260 and 330 W・m^2. The inside enthalpy was about 71 kJ・kg'^1 when the inside temperature was 27℃ (set point for ventilation).
書誌情報 野菜茶業研究所研究報告
en : Bulletin of the National Institute of Vegetable and Tea Science

巻 10, p. 95-104, 発行日 2011-02-28
出版者
出版者 独立行政法人 農業・食品産業技術総合研究機構
ISSN
収録物識別子タイプ ISSN
収録物識別子 1346-6984
DOI
関連タイプ isIdenticalTo
識別子タイプ DOI
関連識別子 10.24514/00001714
著者版フラグ
出版タイプ VoR
出版タイプResource http://purl.org/coar/version/c_970fb48d4fbd8a85
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