Fire Protection Plumbing Quick Reference Guide

1. Executive Summary

This proposal outlines the design and implementation of a make-up water system for cooling towers at [Facility Name/Location]. The system will ensure optimal water quality and quantity to maintain cooling tower efficiency while minimizing water consumption and treatment costs.

2. System Requirements

            Key Parameters to Specify:
            Cooling Tower Capacity: [X] tons of refrigeration
Water Flow Rate: [Y] m³/hr (design & peak)
Evaporation Loss: [Z] m³/day (calculated based on heat load)
Drift Loss: Typically 0.1-0.2% of circulating flow
Blowdown Rate: Determined by cycles of concentration
Make-up Water Quality: Source water analysis required

        

3. System Design

3.1 Water Source Selection

Municipal water supply
Borewell/groundwater
Surface water (river/lake)
Reclaimed water (after treatment)

3.2 Treatment System Components

Component	Purpose	Design Considerations
Filtration System	Remove suspended solids	Multi-media filters, cartridge filters, or membrane filtration based on water quality
Softening System	Reduce hardness	Ion exchange or chemical softening, capacity based on hardness levels
Chemical Injection	Scale/corrosion control	Dosing pumps for scale inhibitors, biocides, pH adjusters
Reverse Osmosis	For high TDS water	Required when cycles of concentration demand very low make-up water TDS
Storage Tanks	Buffer capacity	Minimum 24 hours of make-up water demand

3.3 Piping and Instrumentation

Material selection (PVC, CPVC, SS 304/316 based on water chemistry)
Flow meters with totalizers for water accounting
Conductivity/pH sensors for quality monitoring
Automated control valves for blowdown control

4. Water Balance Calculations

Key Equations:

Evaporation Loss (E): E = Q × ΔT × 0.00085 (for °F) or E = Q × ΔT × 0.00153 (for °C)

Blowdown (B): B = E/(C-1), where C = cycles of concentration

Make-up Water (M): M = E + B + D (where D = drift loss)

Cycles of Concentration: C = Make-up TDS / Blowdown TDS

5. Water Conservation Features

Automated blowdown control based on conductivity
Side-stream filtration for suspended solids removal
Rainwater harvesting integration (where applicable)
Blowdown water recovery/reuse options
High-efficiency drift eliminators (>0.001% drift loss)

6. Monitoring and Control

SCADA system integration for remote monitoring
Automatic chemical dosing control based on real-time water quality
Alarm systems for low/high level, abnormal water quality
Data logging for regulatory compliance and optimization

7. Materials and Equipment Specifications

7.1 Major Equipment List

Make-up water pumps (100% standby recommended)
Filtration system with automatic backwash
Water softening system with brine tank
Chemical storage and dosing systems
Instrumentation package (flow, pressure, quality sensors)

7.2 Material Specifications

Piping: Schedule 80 PVC for chemical compatibility
Valves: Butterfly valves for main lines, ball valves for instrumentation
Tanks: FRP or polyethylene for chemical storage

8. Implementation Plan

Phase 1: Detailed engineering and design (4 weeks)
Phase 2: Equipment procurement (8 weeks)
Phase 3: Installation and commissioning (6 weeks)
Phase 4: Performance testing and optimization (2 weeks)
Phase 5: Operator training and handover (1 week)

9. Budget Estimate

Item	Quantity	Unit Cost	Total Cost
Filtration System	1	[X]	[X]
Softening System	1	[X]	[X]
Chemical Dosing System	3	[X]	[X]
Storage Tanks	2	[X]	[X]
Piping and Valves	1 lot	[X]	[X]
Total	[Total Amount]

10. Appendices

Appendix A: Water quality analysis report
Appendix B: P&ID drawings
Appendix C: Equipment datasheets
Appendix D: Calculation sheets
Appendix E: Manufacturer certifications

Technical Proposal: Make-Up Water System for Cooling Towers