The potential applications and advantages of powering solar air-conditioning systems using concentrator augmented solar collectors

D Nchelatebe Nkwetta, Mervyn Smyth

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

Non-concentrated evacuated tube heat pipe solar collectors have been reported to show higher fluid temperatures with improved thermal performance in the low to medium temperature range (⩽60 °C) due to low heat losses but suffer higher heat losses at the medium to higher temperature range (⩾80 °C) which reduces their efficiency compared to concentrated evacuated tube heat pipe solar collectors. To operate as stand-alone systems capable of attaining temperatures in the range of 70–120 °C, an innovative concentrator augmented solar collector can be an attractive option. The performance of a combined low-concentrator augmented solar collector in an array of evacuated tube heat pipe solar collectors defined as concentrator augmented evacuated tube heat pipe array (CAETHPA) and an array of evacuated tube heat pipe collectors (ETHPC) were tested and compared and results presented in this paper. The analysis of the experimental data allows concluding that the use of a CAETHPA is a more efficient alternative for integrating renewable energy into buildings with higher fluid temperature response, energy collection and lower heat loss coefficient compared to the use of evacuated tube heat pipe collector array (ETHPA).--------------------------------------------------------------------------------
LanguageEnglish
Pages380-386
JournalApplied Energy
Volume89
Issue number1
DOIs
Publication statusPublished - Jan 2012

Fingerprint

Solar collectors
Heat pipes
Air conditioning
Heat losses
Temperature
Fluids

Cite this

@article{0ca4852f0d0248c18bb560e3ab35cb34,
title = "The potential applications and advantages of powering solar air-conditioning systems using concentrator augmented solar collectors",
abstract = "Non-concentrated evacuated tube heat pipe solar collectors have been reported to show higher fluid temperatures with improved thermal performance in the low to medium temperature range (⩽60 °C) due to low heat losses but suffer higher heat losses at the medium to higher temperature range (⩾80 °C) which reduces their efficiency compared to concentrated evacuated tube heat pipe solar collectors. To operate as stand-alone systems capable of attaining temperatures in the range of 70–120 °C, an innovative concentrator augmented solar collector can be an attractive option. The performance of a combined low-concentrator augmented solar collector in an array of evacuated tube heat pipe solar collectors defined as concentrator augmented evacuated tube heat pipe array (CAETHPA) and an array of evacuated tube heat pipe collectors (ETHPC) were tested and compared and results presented in this paper. The analysis of the experimental data allows concluding that the use of a CAETHPA is a more efficient alternative for integrating renewable energy into buildings with higher fluid temperature response, energy collection and lower heat loss coefficient compared to the use of evacuated tube heat pipe collector array (ETHPA).--------------------------------------------------------------------------------",
author = "{Nchelatebe Nkwetta}, D and Mervyn Smyth",
year = "2012",
month = "1",
doi = "10.1016/j.apenergy.2011.07.050",
language = "English",
volume = "89",
pages = "380--386",
journal = "Applied Energy",
issn = "0306-2619",
publisher = "Elsevier",
number = "1",

}

The potential applications and advantages of powering solar air-conditioning systems using concentrator augmented solar collectors. / Nchelatebe Nkwetta, D; Smyth, Mervyn.

In: Applied Energy, Vol. 89, No. 1, 01.2012, p. 380-386.

Research output: Contribution to journalArticle

TY - JOUR

T1 - The potential applications and advantages of powering solar air-conditioning systems using concentrator augmented solar collectors

AU - Nchelatebe Nkwetta, D

AU - Smyth, Mervyn

PY - 2012/1

Y1 - 2012/1

N2 - Non-concentrated evacuated tube heat pipe solar collectors have been reported to show higher fluid temperatures with improved thermal performance in the low to medium temperature range (⩽60 °C) due to low heat losses but suffer higher heat losses at the medium to higher temperature range (⩾80 °C) which reduces their efficiency compared to concentrated evacuated tube heat pipe solar collectors. To operate as stand-alone systems capable of attaining temperatures in the range of 70–120 °C, an innovative concentrator augmented solar collector can be an attractive option. The performance of a combined low-concentrator augmented solar collector in an array of evacuated tube heat pipe solar collectors defined as concentrator augmented evacuated tube heat pipe array (CAETHPA) and an array of evacuated tube heat pipe collectors (ETHPC) were tested and compared and results presented in this paper. The analysis of the experimental data allows concluding that the use of a CAETHPA is a more efficient alternative for integrating renewable energy into buildings with higher fluid temperature response, energy collection and lower heat loss coefficient compared to the use of evacuated tube heat pipe collector array (ETHPA).--------------------------------------------------------------------------------

AB - Non-concentrated evacuated tube heat pipe solar collectors have been reported to show higher fluid temperatures with improved thermal performance in the low to medium temperature range (⩽60 °C) due to low heat losses but suffer higher heat losses at the medium to higher temperature range (⩾80 °C) which reduces their efficiency compared to concentrated evacuated tube heat pipe solar collectors. To operate as stand-alone systems capable of attaining temperatures in the range of 70–120 °C, an innovative concentrator augmented solar collector can be an attractive option. The performance of a combined low-concentrator augmented solar collector in an array of evacuated tube heat pipe solar collectors defined as concentrator augmented evacuated tube heat pipe array (CAETHPA) and an array of evacuated tube heat pipe collectors (ETHPC) were tested and compared and results presented in this paper. The analysis of the experimental data allows concluding that the use of a CAETHPA is a more efficient alternative for integrating renewable energy into buildings with higher fluid temperature response, energy collection and lower heat loss coefficient compared to the use of evacuated tube heat pipe collector array (ETHPA).--------------------------------------------------------------------------------

U2 - 10.1016/j.apenergy.2011.07.050

DO - 10.1016/j.apenergy.2011.07.050

M3 - Article

VL - 89

SP - 380

EP - 386

JO - Applied Energy

T2 - Applied Energy

JF - Applied Energy

SN - 0306-2619

IS - 1

ER -