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Home My WebLink About2001-02-22 Council Packet - Work SessionKenai City Council Work Se~ion February 22, 2001 Hockey Rink Refrigeration CITY OF KENAi ~'~ '/ 210 FIDALGO AVE., SUITE 200 KENAI, ALASKA 99611-7794 TELEPHONE 907-2811-7535 FAX 907-283-3014 ~ M emoranClum Date: To: From.' February 15, 2001 Mayor and City Council Richard A. Ross, City Manager Refrigeration Alternative Attached is a memorandum submitted by Mr. Frates and Mr. La Shot. This will be placed on the March 1 st Parks and Recreation Commission agenda as a discussion item. As you will note, the alternatives proposed represent a major investment in the facility. The most costly alternative is also the one that provides the greatest flexibility in usage. Attachment CITY OF KENA! KENAI PARKS & RECREATION 227 CAVIAR ST. KENAI, ALASKA 99611-7794 TELEPHONE 907-283-3855 / 907-283-7926 FAX 907-283-4675 KENAi MEMORANDUM TO- FROM: Richard A. Ross, City Manager Robert J. Frates, Parks & Recreation Dir. ecto~ Jack LaShot, Public Works Manager DATE: January 18, 2001 Refrigeration Alternatives and Considerations The most critical aspect of a project such as this is the conceptual planning stage. This type of planning is imperative in order to achieve the most cost effective and long-term facility possible, while at the same time serving ,the broad recreation needs of the community. The ultimate question that begs to be answered involves knowing what the long term function of the facility is projected to be. This report will outline some basic refrigeration options along with relative cost estimates. Also included are some important considerations that should be taken, into account while different alternatives are examined. The following areas were researched: Ae Refrigeration systems. Rink floor- asphalt, sand-base, concrete surfaces, and dasherboards. Operating costs. A. REFRIGERATION SYSTEMS There are two types of systems used to extract heat from ice: industrial and commercial. Industrial systems include high-grade equipment (pump, chiller, compressor, condenser), and are typically installed for permanency, have much higher construction costs and include both direct and indirect refrigeration systems. Industrial systems have a lifespan of approximately 30 or more years and are typically installed in conjunction with a concrete-floor, thus, achieving a multi-purpose rink floor that can be exploited during the off season. Commercial systems on the other hand, include refrigeration equipment (chiller, compressor, brine pump, and condenser) that is less expensive and usually incorporatea a portable matt system to extract heat from ice. The portable matt is temporary in nature and is typically installed in a sand-based surface or can rest on a concrete slab. Thi~ system has an estimated lifespan of 10-15 years and is less efficient'to operate. Storage for the matting is a major consideration and it is labor intensive to set-up and take-down each season (3 days work for staff of 10). Direct vs Indirect: Direct refrigeration employs one (1) primary liquid refrigerant called R-22 (dichlorodifluouromethane) which is a type of fi'eon that absorbs heat from the ice by directly traversing approximately 10 miles of pipe. Indirect refrigeration uses two (2) types of refrigerants, including a primary liquid (R-22 or R717 ammonia) and a secondary liquid (calcium chloride, glycol, or other), called a brine. In this system, the secondary brine is cooled by the primary in a heat exchanger and circulated back through pipes evenly spaced below the ice. Indirect systems have become the most preferred choice today due to the fact that the hazardous refdgerants (R-22 or R717) are contained in a mechanical room and not flowing through 10 miles of pipe. Direct systems, on the other hand, employ R-22 through nearly ten miles of pipe beneath the ice, thu~, making leak potential greater, detection more difficult and repairs costly. For these reasons, a direct system is not included in this report. The Central Peninsula Sports Center convened over to an indirect system approximately eleven years ago. Furthermore, the following facilities throughout Alaska also employ indirect systems' Ft. Wainwright, McGlinchie, Dempsey 2, BenBOeke, O'malley Ice Rink, Bonnie Cusack. B. RINK FOOR AND DASHERBOARDS Two options are available: concrete and sand-base. Asphalt is not a recommended surface due to it's low heat transfer qualities. An industrial refrigeration system typically involves a concrete ~urface, whereas, the tubing throughout the rink is protected beneath a slab of concrete. Concrete offers the advantage of a flat surface, thus, making it easy to install and maintain ice. Due to the consistent end-to-end ice thickness of approximately an inch and a quarter over a concrete slab, it becomes possible to operate much more efficiently. A concrete slab also protects the nearly 10 miles of pipe. Lastly, concrete provides a multi-use floor for other activities needing a hard surface, i.e., basketball, skateboarding/bike riding, in-line hockey, etc. A sand-base medium is often chosen in order to reduce the initial construction cost. A permanent piping system may be installed and buffed beneath the sand, or a portable matt system can be placed on top of the sand. In either case, the sand surface may not be consistent from end-to-end, and thus, the ice surface has to be built to accommodate the highest poim, making installation and maimenance more difficult. Permanent piping would exclude other uses since protection for the pipes would not exist. A portable matt system, on the other hand, may be rolled up and Stored out of the way thus allowing other uses during the off-season. In this scenario, off-season use of the facility would Only be restricted, rather than excluded. Moreover, if concrete is a consideration, this would be an appropriate time to discuss dasherboards. The existing dasherboards would mostly likely have to be replaced at-this stage. New installation could include base plates and removable boards and posts, thus allowing the option to remove panels for special activities. C. OPERATING COSTS: Currently, the 12 month high for heating and electricity at the multi-purpose facility is $213.93 and $1,546.40 respectfully. Water costs are currently $40.00 per month. One would reason that if a mechanical room was added heat costs would go up accordingly. Furthermore, a dependable refrigeration system coupled with a marketable program would contribute to a longer season and increased use, and thus account for higher electrical and maintenance cost. However, user fees could offset the additional expense. Furthermore, the refrigeration unit would only be used during ice installation and throughout warming spells, otherwise the natural temperature would be used to maintain ice. The Central Peninsula Sports Center spends approximately $9,000 to $10,000 per month for utilities; however, much of this cost is directly related t° heating a large facility and continuous operation of the refrigeration unit. MULTI-PURPOSE FACILITY REFRIGERATION SYSTEM COST ESTIMATE Commercial System (labor included) Indirect Refrigeration Equipment Porta-matt Mechanical Room - Temporary Electrical NE Fees & Contingency Total (Sand-Based) Concrete Slab- 4" entire building Total (Concrete) $180,000 65,000 50,000 30,000 $325,000 80,000 $100,000 $405,000 $505,000 Industrial System (labor included) Indirect Refrigeration System Mechanical Electrical 6"Concrete Slab with Piping, Insulation, Vapor Bamer, etc. A/E Fees & Contingency Total $25O,OOO 100,000 40,000 250,00O 640,000 $ 6o,ooo $800.000 Additional Elements - either system New Dasher Boards Additional Storage Building Restmoms A.C. Parking - (see estimate) $ 80,000 50,000 70,00O 90,000 $290,000 MEMORANDUM . CITY OF KENAI 210 FIDALGO AVE.. SUITE 200 KENAI, ALASKA 99611-7794 TELEPHONE 907-283-7535 FAX 90T-283-3014 ~ TO: FROM: DATE' SUBJECT: Rick Ross, City Manager Jack La Shot, Public Works Manager/~,/~- Apdi 26, 2000 Paving Costs- Challenger & Multi-Purpose Facilities ,, it , I had Wince, Cortheli, Bryson prepare a rough estimate to do the paving at the reforenced facilities. The attached drawing shows the area divided into possible areas to pave based on which entity would pay the costs and best use of the paving. The actual costs will vary, especially if we choose to do less than the entire project. I based the percentages on the entire project. Area 1 Area 5 Challenger Parking Service Entrance 24% $30,627 7% 8,933 Total Challenger $39,560 Area 2 MPF Parking 28% $ 35,731 Area 3 MPF Parking 31% 39,559 Area 4 Access Road 10% ! 2,761 Total City $ 88,051 Grand Total $127,611 Possible future additions to both facilities will affect Areas No. 3 and No. 5. Areas No. 1,2, & 4 would seem to benefit both parties the most with the least loss when future additions are done. JL/jet Attachment COST ESTIMATE For CHALLENGER & MULTIPURPOSE FACILITY SITE PAVING ITEM QUANTITY UNIT COST A--'~'alt Pavement 8645 S Y- - Leveling Course 8813 SY $10.00/SY- 2.00/SY Excavation 528 CY 10.00/CY Adjust Manhole 1 Ea 250.00/Ea Adjust Valve Box 2 Ea 250.00/Ea Construction Total Contingency (5%) Design Inspection Total COST $8 oo 7,626.00 5,280.00 250.00 500.00 $110,106.00 5,505.00 2,000.00 10,000.00 $127,611.00. '1'. 3.. ~ 1~.<~0~3S . t g -- ] - --'~' ..... --I \ I \I \I \~ \I \ ! \ I MULTI-PURPOSE FACILITY REFRIGERATION SYSTEM COST ESTIMATE Commercial System (labor included) Indirect Refrigeration Equipment Porta-matt Mechanical Room - Temporary Electrical NE Fees & Contingency Total (Sand-Based) Concrete Slab- 4" entire building Total (Concrete) $180,000 65,000 50,000 30,000 $325,OOO 80,000 $100,000 $405,000 $505,000 Industrial System (labor included) Indirect Refrigeration System Mechanical Electrical 6"Concrete Slab with Piping, Insulation, Vapor Bamer, etc. NE Fees & Contingency Total $25O,OOO 100,000 40,000 250,000 640,000 $ 6o,ooo $800,000 Additional Elements - either system New Dasher Boards Additional Storage Building Restmoms A.C. Parking - (see estimate) $ 8O,OOO 50,000 70,000 9o,ooo $290,000 MEMORANDUM CITY OF KENAI 210 FIDALGO AVE.. SUITE 200 KENAI, ALASKA 99611-7794 TELEPHONE g07-283-753S FAX 907-283-3014 TO: FROM: DATE. SUBJECT: Rick Ross, City Manager Jack La Shot, Public Works Uanager~~ 'Apdi 26, 2000 Paving Costs - Challenger & Multi-Purpose Facilities I had Wince, Corthell, Bryson prepare a rough estimate to do the paving at the reforenced facilities. The attached drawing shows the area divided into possible areas to pave based on which entity would pay the costs and best use of the paving. The actual costs will varg, especially if we choose to do less than the entire project. I based the percentages on the entire project. Area 1 Area 5 Challenger Parking Service Entrance 24% $30,627 7% 8,933 Total Challenger $39,560 Area 2 MPF Parking 28% $ 35,731 Ama 3 MPF Parking 31% 39,559 Ama 4 Access Roacl 10% 12,761 Total City $ 88,051 Grand Total $127,611 Possible future additions to both facilities will affect Areas No. 3 and No. 5. Areas NO. 1,2, & 4 would seem to benefit both parties the most with the least loss when future additions are done. JL/jet Attachment F ..... ~ ..... -3 I I / I I I Z COST ESTIMATE For CHALLENGER & MULTIPURPOSE FACILITY SITE PAVING ITEM QUANTITY UNIT COST Asphalt Pavement 8645 SY $10.00/Sy Leveling Course 8813 SY 2.00/SY Excavation 528 CY 10.00ICY Adjust Manhole 1 Ea 250.00lEa Adjust Valve Box 2 Ea 250.00lEa Construction Total Contingency (5%) Design Inspection Total COST $86,450.00 .17,626.00 5,280.00 250.00 500.00 $110,106.00 5,505.OO 2,000.00 10.000.00 $127,611.00 · Ph Enclose Facility Indoor Modification Buyout Phase I L LC Stable ice $1,012,000 TO DAY Possible i