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Title: Cold-Climate Solar Domestic Water Heating Systems: Life-Cycle Analyses and Opportunities for Cost Reduction

Abstract

Conference paper regarding research in potential cost-savings measures for cold-climate solar domestic water hearing systems.

Authors:
; ;
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
875330
Report Number(s):
NREL/CP-550-37748
TRN: US200603%%88
DOE Contract Number:
AC36-99-GO10337
Resource Type:
Conference
Resource Relation:
Conference: Presented at the ISES Solar World Congress, 6-12 August 2005, Orlando, Florida
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; LIFE CYCLE; SOLAR WATER HEATING; WATER; BUILDINGS; SOLAR DOMESTIC WATER HEATING; COLD-CLIMATE SOLAR DOMESTIC WATER HEATING; COLD-CLIMATE SOLAR WATER HEATING; Buildings

Citation Formats

Burch, J., Salasovich, J., and Hillman, T. Cold-Climate Solar Domestic Water Heating Systems: Life-Cycle Analyses and Opportunities for Cost Reduction. United States: N. p., 2005. Web.
Burch, J., Salasovich, J., & Hillman, T. Cold-Climate Solar Domestic Water Heating Systems: Life-Cycle Analyses and Opportunities for Cost Reduction. United States.
Burch, J., Salasovich, J., and Hillman, T. Thu . "Cold-Climate Solar Domestic Water Heating Systems: Life-Cycle Analyses and Opportunities for Cost Reduction". United States. doi:. https://www.osti.gov/servlets/purl/875330.
@article{osti_875330,
title = {Cold-Climate Solar Domestic Water Heating Systems: Life-Cycle Analyses and Opportunities for Cost Reduction},
author = {Burch, J. and Salasovich, J. and Hillman, T.},
abstractNote = {Conference paper regarding research in potential cost-savings measures for cold-climate solar domestic water hearing systems.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Dec 01 00:00:00 EST 2005},
month = {Thu Dec 01 00:00:00 EST 2005}
}

Conference:
Other availability
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  • To determine potential for reduction in the cost of saved energy (COSE) for cold-climate solar domestic hot water (SDHW) systems, COSE was computed for three types of cold climate water heating systems. For each system, a series of cost-saving measures was considered: (1) balance of systems (BOS): tank, heat exchanger, and piping-valving measures; and (2) four alternative lower-cost collectors. Given all beneficial BOS measures in place, >50% reduction of COSE was achievable only with selective polymer collectors at half today's selective collector cost. In all three system types, today's metal-glass selective collector achieved the same COSE as the hypothesized non-selectivemore » polymer collector.« less
  • The Solar Heating and Lighting Sub-program has set the key goal to reduce the cost of saved energy [Csav, defined as (total cost, $)/(total discounted savings, kWh_thermal)] for solar domestic water heaters (SDWH) by at least 50%. To determine if this goal is attainable and prioritize R&D for cold-climate SDWH, life-cycle analyses were done with hypothetical lower-cost components in glycol, drainback, and thermosiphon systems. Balance-of-system (BOS, everything but the collector) measures included replacing metal components with polymeric versions and system simplification. With all BOS measures in place, Csav could be reduced more than 50% with a low-cost, selectively-coated, glazed polymericmore » collector, and slightly less than 50% with either a conventional selective metal-glass or a non-selective glazed polymer collector. The largest percent reduction in Csav comes from replacing conventional pressurized solar storage tanks and metal heat exchangers with un-pressurized polymer tanks with immersed polymer heat exchangers, which could be developed with relatively low-risk R&D.« less
  • A simplified design procedure is examined for estimating the storage capacity and collector area for annual-cycle-storage, community solar heating systems in which 100% of the annual space heating energy demand is provided from the solar source for the typical meteorological year. Hourly computer simulations of the performance of these systems were carried out for 10 cities in the United States for 3 different building types and 4 community sizes. These permitted the use of design values for evaluation of a more simplified system sizing method. Results of this study show a strong correlation between annual collector efficiency and two major,more » location-specific, annual weather parameters: the mean air temperature during daylignt hours and the total global insolation on the collector surface. Storage capacity correlates well with the net winter load, which is a measure of the seasonal variation in the total load, a correlation which appears to be independent of collector type.« less
  • (1) Eight single-family-sized solar domestic water heaters and a conventional elecric water heater have been installed in Alabama Solar Energy Center's Test Facility for the purpose of acquiring comparative performance and operational data under identical operational and climatic conditions. The systems employ three examples of freeze protection typically encountered in the Tennessee Valley, (e.g. oil, antifreeze, and drainback).
  • Maintenance and repair (M and R) cost estimates are needed during planning, design, and operations/maintenance of Army facilities. During planning, life cycle costs are needed to evaluate alternative ways of meeting requirements (e.g., lease, new construction, renovate existing facilities). During design, M and R requirements for various types of components, such as built-up or shingle roofs, are needed so that the total life cycle cost of different designs can be minimized. Finally, once the facility has been constructed, outyear predictions of maintenance and repair costs are needed so that enough funds can be programmed to ensure that Army facilities aremore » maintained properly and do not deteriorate due to lack of maintenance.« less