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Design: Solar Heating of Buildings and Domestic Hot Water

MIL-HDBK-1003/13A

Generally mesh screens are not recommended. Collectors and mounts must

withstand expected wind and snow loads. Collector design should allow for

rapid replacement of glass covers. Pumps, pipes, and controls should be

reasonably accessible to allow repair or replacement. Water pumps should be

located so that leakage does not cause serious damage.

As of the date of this report, the Navy has installed solar heating systems

at many of its bases including family housing units, BEQ's, cafeterias, and

miscellaneous buildings. As solar designs move from theory to practice, a

knowledge of reliability, durability, and maintainability is desired to

achieve maximum system performance. To achieve this information NCEL has

initiated an on-site evaluation of solar systems installed at these bases.

These evaluations have resulted in a compilation of "lessons learned" which

in turn has resulted in suggestions as to how to do a preventative

maintenance program to avoid these common problems. The list of "lessons

learned" can be used as a pre-design checklist as well as a guide for a

preventative maintenance program. After the program is complete details may

be included in this handbook or perhaps as a separate document. Preliminary

information is available from the reference section (Durlak, 1983).

2.10.4 Contract submittals required. In soliciting a bid from a proposed

contractor, the worksheets in the following sections will provide the

necessary information to evaluate each proposal. It is urged that there be

close coordination between the different design disciplines at all stages of

design and preparation of construction drawings. Whether or not these

worksheets are used, the following list provides the information that should

be obtained from any proposed contractor:

Introduction (briefly state scope, project description, references,

method used, etc.).

Study summary (much of this information would be contained on

completed worksheet A).

(1)

FY Year, P-Number and project location.

(2)

Type of solar system (domestic hot water, space heating, space

cooling).

(3) Type and area of collectors.

(4) Estimate solar system installed costs (exclusive of SIOH and

contingency).

(5) Average annual energy savings and fuel used.

(6) Average energy savings in barrels of oil equivalent (BOE).

(7) Percent energy contribution from solar systems.

(8) Savings/investment ratios.

(9) Solar system design cost (study and design costs separate).

(10) DEIS fuel costs that are used in study.

(11 Description of freeze and high temperature and pressure

protection.

(12) Description of control sequence.

(13) Initial year O&M costs and requirements.