MEETING AGENDA. Project Administrator:

Transcription

1 MEETING AGENDA Project Administrator: To: Ann Green M. Baker, SLCS C. Bullinger, SLCS R. Clark, SLCS Board C. Cox, SLCS S. Dotinga, Granger J. Graham, SLCS J. Gusick, SLCS, Board C. Hanshaw, SLCS Board A. McCusker, SLCS M. Nowosad, Granger A. Green, IDS C. Lewis, IDS Project Name: SLCS-Bond 2015 Facility Planning Committee (FPC) Meeting IDS Project No.: Date and Time: Location: August 4, :00-10:30 am SLCS Superintendent s Conference Room 1. Review New Elementary plan options and site layout 2. Mechanical concept recommendation for existing elementary buildings (Bartlett, Sayre, Salem, Dolsen) ec: File J. Weimer Document2

2 July 28, 2015 Ms. Melissa Baker Superintendent South Lyon Community Schools 345 South Warren South Lyon, MI Project Name: South Lyon Community Schools 2015 Bond Elementary School Remodeling IDS Project No.: Dear Ms. Baker: Integrated Design Solutions has performed an evaluation of several heating, ventilating and air conditioning renovation options for the existing classrooms at Dolsen Elementary, Bartlett Elementary, Salem Elementary and Sayre Elementary Schools. The systems evaluated in the analysis included the following: 1. Vertical unit ventilator with hot water heating and chilled water cooling. 2. Vertical unit ventilator with hot water heating and DX cooling; reuse existing how water heating piping. 3. Vertical unit ventilator with hot water heating and DX cooling; provide new how water heating piping. 4. Above ceiling variable refrigerant flow (VRF) with roof mounted energy recovery unit. 5. Vertical unit ventilator with air-source heat pump. 6. Vertical unit ventilator with hot water heating and chilled water cooling. The analysis included the estimated cost of construction, annual energy and maintenance costs, sound power levels and simple payback, as well as a list of pros and cons for each system. Of the systems evaluated, the above-ceiling variable refrigerant flow (VRF) with roof-mounted energy recovery unit provided the lowest annual owning and operating cost with a slight premium over the lowest first cost system. The estimated construction cost is less than the system budgeted in the bond. On July 15, 2015, IDS, along with representatives from the South Lyon School District, visited the Daikin Training Facility in New Hudson, Michigan to review the VRF system components, options and basic operation, and to become familiar with its operation. Based on the HVAC analysis and site visit, IDS recommends that the above-ceiling variable refrigerant flow (VRF) with roof-mounted energy recovery unit system be implemented at the above elementary schools. A copy of the Classroom HVAC Analysis is attached for reference w. long lake road, ste. 200 troy, mi I N T E G R A T E D design S O L U T I O N S architecture engineering interiors & technology

3 Ms. Melissa Baker IDS Project No July 28, 2015 Page 2 If you have any questions and/or comments, please contact me. Sincerely, Integrated Design Solutions, LLC David M. DiCiuccio, PE Executive Vice President Attachment cc: File F:\2015\15137\2014\Corr\Design\ltr001.docx

4 SOUTH LYON COMMUNITY SCHOOLS SOUTH LYON, MICHIGAN CLASSROOM HVAC ANALYSIS July 30, 2015

5 TABLE OF CONTENTS PURPOSE AND ASSUMPTIONS... TAB 1 VERTICAL UNIT VENTILATOR WITH CHILLED WATER COOLING AND HOT WATER HEATING... TAB 2 VERTICAL UNIT VENTILATOR WITH DX COOLING AND HOT WATER HEATING (EXISTING)... TAB 3 VERTICAL UNIT VENTILATOR WITH DX COOLING AND HOT WATER HEATING (NEW)... TAB 4 ABOVE-CEILING VARIABLE REFRIGERANT FLOW (VRF)... TAB 5 VERTICAL UNIT VENTILATOR WITH AIR-SOURCE HEAT PUMP... TAB 6 VERTICAL UNIT VENTILATOR WITH WATER-SOURCE HEAT PUMP... TAB 7 CLASSROOM HVAC COMPARISON... TAB 8 CLASSROOM HVAC SUMMARY... TAB 9 f:\2015\15137\2014\reports\design\rpt001final docx Page i

6 PURPOSE AND ASSUMPTIONS PURPOSE The purpose of this analysis is to compare six different classrooms HVAC options for the existing elementary schools at South Lyon Community Schools. These schools include Bartlett Elementary, Sayre Elementary, Salem Elementary and Dolsen Elementary. The analysis includes estimated cost of installation, annual energy and maintenance costs, sound power levels, simple payback as well as a list of pros and cons for each system analyzed. The systems included in the analysis are as follows: Vertical Unit Ventilator with Chilled Water Cooling and Hot Water Heating Vertical Unit Ventilator with DX Cooling and Hot Water Heating (Existing) Vertical Unit Ventilator with DX Cooling and Hot Water Heating (New) Above-Ceiling Variable Refrigerant Flow (VRF) Vertical Unit Ventilator with Air-Source Heat Pump Vertical Unit Ventilator with Water-Source Heat Pump ASSUMPTIONS A virtual building model was created for this analysis. o The model consists of 10 classrooms. o Each classroom is 728 sqft. o The classrooms were oriented to account for the diversity of peak loads individual classrooms due to solar heat gain. o The model includes heat gains and losses through walls, windows and roofs of typical construction. o The model includes internal loads from people, lights and equipment per ASHRAE 90.1 guidelines. o The model underwent a computer simulation of 10 months assuming standardized weather data for Michigan. o The building was assumed to be unoccupied between June 15th and August 15th per owner direction. Energy recovery of the ventilation air was assumed across all options. All options include above-ceiling ducting of supply air to ceiling mounted diffusers in classrooms. In most options it is assumed that the existing hot water heating distribution system is beyond its useful life and requires replacement. One option with the (EXISTING) designation explores the implications of reusing the existing piping. All existing Unit Ventilators will be removed. f:\2015\15137\2014\reports\design\rpt001final docx Page 1.1

7 VERTICAL UNIT VENTILATOR WITH CHILLED WATER COOLING AND HOT WATER HEATING SYNOPSIS Classrooms Thru-wall unit ventilator in each classroom; heating and cooling, blower fan. Integral energy recovery wheel. Exterior louvers provided by unit manufacturer. Integrated hot water coil provided by unit manufacturer. Integrated chilled water coil provided by unit manufacturer Remotely mounted room controller furnished by unit manufacturer; hard wired in field to unit with surface mounted wire molding or above ceiling. Room controller controls chilled water and hot water heating control valve. New hot water heating distribution to serve integral heating coil. New chilled water distribution to serve integral cooling coil. Moderate amount of architectural repair for the existing unit ventilator louver opening. Moderate amount of architectural renovation for the new unit ventilator louver opening. Ceiling and lights will be replaced. Existing casework will be revised to accommodate new unit ventilator. Distribution and Central Systems Replacement of hot water heating distribution piping. New chilled water distribution piping. New chilled water plant equipment; 30-Ton air-cooled chiller, pumps, air separator and chemical treatment. Reuse existing boilers and pumps. Significant amount of architectural demolition and repair to accommodate new hot water heating and chilled water piping. f:\2015\15137\2014\reports\design\rpt001final docx Page 2.1

8 VERTICAL UNIT VENTILATOR WITH DX COOLING AND HOT WATER HEATING (EXISTING) SYNOPSIS NOTE: This option reuses the existing hot water heating distribution piping. The condition of the existing piping in the buildings being considered in this study may be considered POOR to ADEQUATE. This option would be applied to a building where the existing hot water heating piping is considered ADEQUATE. Classrooms Thru-wall unit ventilator in each classroom; integral refrigerant circuit, compressor, thru-wall condensing unit, blower fan. Integral energy recovery wheel. Exterior louvers provided by unit manufacturer. Integrated hot water coil provided by unit manufacturer. Self-contained DX cooling refrigerant circuit (No remote condensing unit). Remotely mounted room controller furnished by unit manufacturer; hard wired in field to unit with surface mounted wire molding or above ceiling. Room controller controls DX cooling and hot water heating control valve. Reuse existing hot water heating distribution piping to serve integral heating coil. Moderate amount of architectural repair for the existing unit ventilator louver opening. Moderate amount of architectural renovation for the new unit ventilator louver opening. Ceiling and lights will be replaced. Existing casework will be revised to accommodate new unit ventilator. Distribution and Central Systems Reuse existing hot water heating distribution piping. Reuse existing boilers and pumps. f:\2015\15137\2014\reports\design\rpt001final docx Page 3.1

9 VERTICAL UNIT VENTILATOR WITH DX COOLING AND HOT WATER HEATING (NEW) SYNOPSIS NOTE: This option includes the replacement of the existing hot water heating distribution piping. The condition of the existing piping in the buildings being considered in this study may be considered POOR to ADEQUATE. This option would be applied to a building where the existing hot water heating piping is considered POOR. Classrooms Thru-wall unit ventilator in each classroom; integral refrigerant circuit, compressor, thru-wall condensing unit, blower fan. Integral energy recovery wheel. Exterior louvers provided by unit manufacturer. Integrated hot water coil provided by unit manufacturer. Self-contained DX cooling refrigerant circuit (No remote condensing unit). Remotely mounted room controller furnished by unit manufacturer; hard wired in field to unit with surface mounted wire molding or above ceiling. Hot water heating control valve provided by unit manufacturer. Room controller controls DX cooling and hot water heating control valve. New hot water heating distribution to serve integral heating coil. Moderate amount of architectural repair for the existing unit ventilator louver opening. Moderate amount of architectural renovation for the new unit ventilator louver opening. Ceiling and lights will be replaced. Existing casework will be revised to accommodate new unit ventilator. Distribution and Central Systems Replacement of hot water heating distribution piping Reuse existing boilers and pumps. Moderate amount of architectural demolition and repair to accommodate new hot water heating piping. f:\2015\15137\2014\reports\design\rpt001final docx Page 4.1

10 ABOVE-CEILING VARIABLE REFRIGERANT FLOW (VRF) SYNOPSIS Classrooms Heating and cooling, above-ceiling unit in each classroom; integral refrigerant circuit, condensate pump, blower fan. Integral energy recovery wheel. Five (5) rooms per 15-ton condensing unit. Branch selector unit at each terminal above ceiling. Remotely mounted room controller furnished by unit manufacturer; hard wired in field to unit with surface mounted wire molding or above ceiling. Moderate amount of architectural repair for the existing unit ventilator louver opening. Ceiling and lights will be replaced. Distribution and Central Systems Moderate amount of refrigerant piping in above classroom ceilings. Two (2) 15 Ton condensing units on roof utilizing energy recovery. Demolish or abandon existing hot water heating system; boilers, piping, pumps, etc.. Cabinet unit heaters are replaced with cabinet unit heaters with electric heat. Packaged rooftop unit (3500 cfm) with DX Cooling, Indirect gas-fired heating and total energy recovery wheel provides ventilation air to classroom terminal units. Significant amount of architectural demolition and repair to accommodate new refrigerant lines and ventilation ductwork. f:\2015\15137\2014\reports\design\rpt001final docx Page 5.1

11 VERTICAL UNIT VENTILATOR WITH AIR-SOURCE HEAT PUMP SYNOPSIS Classrooms Thru-wall unit ventilator in each classroom; integral refrigerant circuit, compressor, blower fan. Reversible heat pump provides heating and cooling to classrooms. Integral energy recovery wheel. Exterior louver provided by unit manufacturer. Unit mounted or remotely mounted room controller furnished by unit manufacturer; hard wired in field to unit with surface mounted wire molding or above ceiling. Room controller controls heat pump function and mode. Moderate amount of architectural repair for the existing unit ventilator louver opening. Moderate amount of architectural renovation for the new unit ventilator louver opening. Ceiling and lights will be replaced. Existing casework will be revised to accommodate new unit ventilator. Distribution and Central Systems Demolish or abandon existing hot water heating system; boilers, piping, pumps, etc.. Cabinet unit heaters are replaced with cabinet unit heaters with electric heat. f:\2015\15137\2014\reports\design\rpt001final docx Page 6.1

12 VERTICAL UNIT VENTILATOR WITH WATER-SOURCE HEAT PUMP SYNOPSIS Classrooms Thru-wall unit ventilator in each classroom; integral refrigerant circuit, compressor, blower fan. Reversible heat pump provides heating and cooling to classrooms. Integral energy recovery wheel. Exterior louver provided by unit manufacturer. Remotely mounted room controller furnished by unit manufacturer; hard wired in field to unit with surface mounted wire molding or above ceiling. Room controller controls heat pump function and mode. Moderate amount of architectural repair for the existing unit ventilator louver opening. Moderate amount of architectural renovation for the new unit ventilator louver opening. Ceiling and lights will be replaced. Existing casework will be revised to accommodate new unit ventilator. Distribution and Central Systems Demolish existing hot water heating distribution piping. New dry cooler mounted on roof. New condenser water loop, with glycol-water mixture, to dry cooler, boilers and each classroom heat pump. Maintain existing boilers to provide supplemental heat to condenser water loop. Maintain existing boilers to provide hot water heating to cabinet unit heaters. f:\2015\15137\2014\reports\design\rpt001final docx Page 7.1

13 CLASSROOM HVAC SUMMARY f:\2015\15137\2014\reports\design\rpt001final docx Page 8.1

14 CLASSROOM HVAC COMPARISON f:\2015\15137\2014\reports\design\rpt001final docx Page 9.1