EVALUATION OF A SOIL HEAT EXCHANGER-STORAGE SYSTEM FOR A GREENHOUSE .2. ENERGY SAVING ASPECTS

被引：0

作者：

BERNIER, H

RAGHAVAN, GSV

PARIS, J

机构：

[1] MCGILL UNIV,MACDONALD COLL,DEPT AGR ENGN,ST ANNE BELLEVUE H9X 1C0,QUEBEC,CANADA

[2] ECOLE POLYTECH,DEPT GENIE CHEM,MONTREAL H3C 3A7,QUEBEC,CANADA

来源：

CANADIAN AGRICULTURAL ENGINEERING | 1991年 / 33卷 / 01期

关键词：

Economics - Analysis - Energy Conservation - Analysis - Greenhouses - Heat Exchangers - Heat Exchangers - Testing - Soils - Energy Storage;

D O I：

暂无

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

A soil heat exchanger-storage system consisting of 26 non-perforated, corrugated plastic drainage pipes, 102 mm in diameter, was installed in a commercial-type greenhouse. Two rows of 13 pipes, 12 m long, were buried at 450 mm and 750 mm depths, respectively. The pipes run parallel to the horizontal axis of the greenhouse, and are spaced 450 mm apart. Ambient air from the greenhouse is circulated through the pipes at a flowrate of 0.91 m3/s. The system performance is more influenced by greenhouse air temperature than by incident solar radiation. Results indicate that solar energy contributed to 58% of the heating requirements from February to June and from September to December 1986. This contribution represents approximately a 33% energy saving. The payback period for the system is from one to five years, depending on costs and crop productivity improvements.

引用

页码：99 / 105

页数：7