ADDENDUM NO. 01. Include this signed and dated addendum to your proposal.

Transcription

1 ADDENDUM NO. 01 To City of College Park RFP FIN LEASE ADVERTISEMENT for LEASE for TAX-EXEMPT FINANCING Please note the following additions/changes to this bid. Include this signed and dated addendum to your proposal. RFP FIN LEASE (for TAX-EXEMPT FINANCING) PLEASE NOTE: Questions received by , and the City s responses listed herein. PLEASE NOTE: The Purchasing Department strives to maintain consistently fair and equitable dealings with all vendors, therefore the City prohibits communications with respect to this bid opportunity initiated by a bidder to any City official, consultant or employee for the period of time from the closing of the tender up to and including the date that the contract has been awarded (the Blackout Period ). Any communication between the bidder and the City during the Blackout Period will be initiated by the City s Purchasing Department for the sole purpose of obtaining information or clarification necessary in order to ensure a proper and accurate evaluation of the bid. Any communication initiated by a bidder during the Blackout Period may be grounds for disqualifying the offending bidder from consideration for the contract award. COMPANY NAME SIGNATURE DATE PRINT NAME RFP FIN LEASE (for TAX-EXEMPT FINANCING) Page 1

2 ADDENDUM NO. 01 To City of College Park RFP FIN LEASE Please note the following additions/changes to this bid. Include this signed and dated addendum to your proposal. Please note that questions were copied from received. City s responses are shown in red. Q. Could you describe the mix of equipment the City anticipates financing over the course of the lease term? Also could you describe in more detail the amount and what type of equipment will be financed in 2016? A. Please see attached 4-page GICC Project Scope of Work. Q. Are the City's 2015 certified audited financials are available. If not, when are they expected to be available. A. The CAFR information requested is now on the web-site. Attachment follows. Remainder of this page left blank. RFP FIN LEASE (for TAX-EXEMPT FINANCING) Page 2

3 ECM Descriptions: GICC-1: Cooling Tower Control and Flow Optimization This project includes adopting and implementing operating practices to optimize the heat transfer effectiveness and performance of the cooling towers. One such practice includes distributing more water to currently unused cells within the limitations set forth by the tower manufacturer to reduce scale and corrosion. GICC-2: Variable Frequency Drives on Cooling Tower Fans This project includes an add-alternate to install variable frequency drives (VFD) on each of the four, two-speed, 30- hp electric motors for increased energy savings. The simple payback is higher but in the quest for energy savings to meet LEED criteria, the project is presented and will provide additional/marginal energy savings and better setpoint control. This ECM also will require new cooling tower motors as the existing ones are not inverter-duty rated. GICC-3 Condenser Water Supply Temperature Reset Improvement This project includes a more energy efficient wet bulb reset strategy for the chiller entering condenser water temperature (ECWT). Existing programming will be modified to allow the ECWT setpoint to be reset on wet bulb to an absolute user adjustable minimum (i.e. 60 F) as long as the leaving condenser water and chilled water temperature difference does not exceed a user adjustable setpoint (i.e. 15 F) determined through field testing and experience. With this flexibility in control, a more optimal sequence can be established based on the operator s first-hand experience and any field or functional testing. GICC-4 Chilled Water Supply Temperature Resets This project includes an automated reset strategy for the chiller leaving chilled water supply temperature (CHWST) as an energy conservation measure. The proposed strategy utilizes both ambient dry bulb and dewpoint temperature to ensure proper moisture removal is accomplished through HVAC equipment and relative humidity levels are maintained within the facility. GICC-5 Chilled Water Differential Pressure and Minimum Flow Control Optimization This project is to include several measures to optimize the variable chilled water pump operation through the maintenance of a differential pressure (DP) setpoint and the chillers or pumps minimum flow. This project also addresses the design and control discrepancies associated with this system s control. GICC-6 Chilled Water Pump Control Optimization This project recommends a functional field test to determine the lowest pump power associated with the primary chilled water pumps operating in parallel. Theoretically, operating two pumps in tandem at higher loads appears to minimize pump energy; but a field test will determine definitively. If the test proves favorably to the tandem pump operation, then modifications to and verifications of the current pump control sequence will be implemented. GICC-7 Cooling Plant Reduced Operation This project is to implement several measures and operating/scheduling practices to reduce the total runtime of the cooling plant. These measures may include: (1) replacing or re-calibrating the chilled water system flowmeter; (2) modifying the chiller staging control logic to allow for more loading of the lead chiller prior to enabling the lag chiller; and (3) as applicable, the use of duty cycling during the early AM hours of the facility during the wintertime and if partial airside economizers can be utilized on those AHUs that are requiring cooling and some higher temperatures in the lighting dimmer control rooms can be tolerated. Based on several unknown operational conditions; this ECM is presented herein as reference only with zero savings and a cost allowance and will be investigated further in any future investment grade development. 1

4 GICC-8 Variable Frequency Drives (VFDs) Condenser Water Pumps This project is to install 100-hp variable frequency drives (VFDs) without bypasses on each 100-hp condenser water pump motor. Potential application of the VFDs would include, but not be limited to, the following: Manual Balancing - Fully open the butterfly valves and use the VFD to slow the pump speed until the desired flow rate is achieved. Capacity Control for Waterside Economizer - Utilize the VFD to slow pump speed to maintain the chilled water supply temperature setpoint during free cooling (there are no control valves). Head pressure control during transition from waterside economizer to mechanical cooling. Dual Pump Operation at Reduced Speed Utilize both pumps in tandem at reduced speed based on laws of parallel pumping and if saves electrical energy. A simple field test can determine which operating sequence is best. The best application yielding the most energy savings would be simply manually balancing the pump. If excess flow is best to be distributed across additional cells (GICC-1) then the VFD would not save as much energy but would allow different flow rates for different cooling plant modes. This is the basis of this ECM. GICC-9 AHU Static Pressure Setpoint Optimization This project proposes establishing the static pressure control setpoints based on a more formal commissioning procedure involving critical-zone VAV damper position for each VAV AHU. In so doing, the turndown of the supply air fans will be increased at part load and less supply fan energy will be consumed while still providing adequate static pressure for required flows. Note that this optimization is currently being done through the AEM program; however, this ECM is presented to provide documentation and a test procedure to confirm. GICC-10 Partial AHU Airside Economizer Operation This project proposes implementing a partial economizer sequence on select AHUs during mild periods to further reduce the cooling plant load; both mechanical cooling and waterside economizer. Operation will be within the limitations of the chiller and based on commissioning procedures verifying space pressurization concerns. The partial economizer mode will be user selected or automated. Only units with predominant (interior, roof only) cooling loads are considered. GICC-11 Individual Zone Scheduling (VAV AHUs) This ECM proposes modifying the BAS programming to allow and compensate for individual zone scheduling. The proposed programming will ensure that the supply air fan remains at a stable operating point, and system static pressure is maintained (ensuring proper airflow to all zones). This programming is proposed on three of the four AHUs; Administration, Meeting Room 1, and Meeting Room 2. GICC-12 Supply Air Temperature Resets (VAV AHUs) This project recommends implementing an automatic supply air reset sequence for the four VAV AHUs. There are several methods to accomplish this control but based on the current points, the following sequence (subject to GICC approval) is recommended: If the outside air dewpoint (calculated or look-up value) is less than a user adjustable setpoint value (i.e. 55 F), reset the supply air temperature (SAT) setpoint through an user adjustable but limited range based on average cooling output of the thermostatic zones. Due to the predominant interior location of these zones, a reset based on outside air is not recommended. The use of OA dewpoint is to allow for SAT resets only when the outside air moisture content is low enough not to contribute to increase relative humidity within the conditioned space. Based on several unknown operational conditions; this ECM is presented herein with a programming cost allowance and no energy usage or cost savings. This will serve as a safety factor in overall energy savings estimations as well as providing the operator flexibility to implement SAT resets if known to save energy in the future based on trend analysis. 2

5 GICC-13 Install Condensing Boiler and Hot Water Pump Balancing This project proposes installing a single new condensing boiler in place of one of the four existing non-condensing models. The proposed new boiler has a net output of approximately 2,800,000 Btu/hr. The maximum flow rate for this particular model appears to be upwards of 350 gpm. The boiler has a gross nominal efficiency of 92% to as high as 99% based on entering water and part-load conditions. Condensing boilers have other benefits including the ability to reset the heating hot water supply temperature as low as 70 F without damage to the boiler. Given the milder conditions in Atlanta, condensing boilers are a suitable application and will yield significant natural gas energy savings. The project includes the replacement of one boiler only with the additional scope items: New condensing boiler must be capable of flow rates accommodating operation of a single hot water pump. Install or use existing balancing valves to balance each pumps for stable single pump operation and to prevent maximum flow through existing boilers with two pumps/boilers in operation. Balance each pump for a total system head of about 155 feet of head. This will allow any one boiler pump to operate alone at about 359 gpm. Given the limitations to the existing boilers, the pump associated with the condensing boiler must always be the lead boiler. When the load is high enough for two boilers then any two hot water pumps can provide about 250 gpm each. Total system head may have to be increased slightly over 155 feet. New Category IV venting to reuse existing roof penetration with existing flue being used as a sleeve with appropriate sealing and flashing. Reuse of existing electrical and control connections. Other existing controls to remain and be reprogrammed accordingly regarding boiler staging. Integrate other boiler controller communication points via BAS. Manually balance the bypass circuits on hot water coil loads closest to the pumps to allow for some pump throttling and to ensure hot water gets to loads at the end of the system. Although this project is based on immediate replacement, it is recommended to install these boilers as late as possible in the LEED certification process and certainly prior to the winter season. The boiler that is in the worst condition or has not yet undergone major maintenance should be replaced. Minor revisions in the boiler control sequence are also recommended and included in this ECM. GICC-14 Four-Foot T8 Fluorescent Lamp Upgrade This project proposes replacing the existing 32-watt T8 lamps with comparable new 28-watt T8 lamps. The proposed lamp is a Philips F32T8/ADV841/EW/LL ALTO 28W. It should be noted that these lamps may reduce light levels slightly and can be more expensive than the typical 32-watt lamp. This project is based on the existing ballasts being compatible with the 28-watt lamps and that the 28-watt lamps can be retrofitted into the existing fixtures. This appears to be the case after site investigations and the 28-watt lamp exhibits the lowest life-cycle cost. GICC-15 Par 38 LED Lamp Retrofit This project proposes replacing the various PAR lamps with LED equivalents. The proposed lamps will replace the existing lamps one-for-one and will simply screw-in the existing fixture. GICC-16 Recessed Can (4 and 6 ) LED Retrofit This project proposes replacing the two recessed can fixtures utilizing tungsten halogen lamps with LED equivalents. The proposed lamps will replace the existing lamps one-for-one and will include a retrofit kit located within the ceiling and will use the existing ceiling penetration and mounting. GICC-17 High Bay Metal Halide Fixture LED Retrofit This project proposes replacing the two metal halide lighting fixtures in the Exhibit Hall area with LED equivalents. The high bay fixtures will be replaced with equivalent fixtures with 156W LED lamps. Note that based on the existing nominal wattage of 400; LED equivalent range from 150W to 240W depending on the desired light levels and the mean lumen rating of the existing lamp/fixture. Given the fact that the current lamp produces more lumens than the specified lamp and to ensure light levels at or above 30 FC; the 240W lamp can be considered. However, based 3

6 on the lower mean lumen output (18,000 mean lumens) of the existing fixture, the 160W replacement is the basis of the ECM. Final photometric analysis can confirm the wattage and accommodate GICC preferences. One of four of the fixtures will need to be wired to the existing emergency lighting circuits. The 100W surface mounted fixtures will be retrofitted with 43W equivalent LED fixtures. The existing ballast will have to be disconnected. GICC-18 Surface Parking Lot and Exterior Lighting Retrofit This project proposes replacing various exterior lighting fixtures/lamps with energy savings retrofits; primarily LED. The parking lot fixture manufacturer has a direct LED replacement for the existing metal halide types. The loading dock high bay fixtures will be replaced with a 100W LED equivalent fixture. The loading dock flood lights will be replaced with similar LED types. The 175W wall packs will be replaced by equivalent nominal 60W LED fixtures. The 250W surface/grade floodlight replacement is more complex. The high light output of the existing metal halide lamp is matched by a 166W equivalent LED. The same fixture manufacturer has a LED replacement; however, the replacement fixture is wider. The existing fastener spacing of the existing ballast box is and it is mounted on a concrete pad only an inch or two wider. The new replacement fixture is just over 24 wide yet its mounting plate should fit on the existing concrete pad. GICC-19 Miscellaneous Lighting Retrofits This project proposes replacing or retrofitting various light fixtures/lamps with more energy efficient types. GICC-20 High Performance Lamp (HPL) Fixture Retrofits This project proposes an architectural lighting re-design of these areas to utilize current LED lighting technology in studio/stage type fixtures which will maintain the overall design concept of the areas. Alternatively, fixtures and arrangements could be chosen that alter the original design concept based on direction from GICC. Due to the many variables involved in this type of project, it is presented for reference only. If feasible, the extent of maximum energy savings (included below) is significant. Conversely, any lighting redesign with this type of advanced LED technology would yield very high paybacks. Note that to meet certain energy reduction goals, certain areas or certain fixtures could be replaced in lieu of a full replacement (i.e. reduced scope). These replacements could architecturally blend into the existing décor. An example of this would be a line of fixtures to illuminate or accent a particular wall, or a particular space such as meeting room pre-functions. 4