W. Ryan Geister - PowerPoint PPT Presentation

1 / 24
About This Presentation
Title:

W. Ryan Geister

Description:

W. Ryan Geister. CenTraVac Product Manager. Vertical Markets ... Kelly and Chan (Vanderweil Engineering) HPAC January 1999: Optimizing Chilled Water Plants' ... – PowerPoint PPT presentation

Number of Views:245
Avg rating:3.0/5.0
Slides: 25
Provided by: mae1
Category:
Tags: geister | kelly | ryan

less

Transcript and Presenter's Notes

Title: W. Ryan Geister


1
Beyond the Flanges, A Look at Chilled Water
System Design
W. Ryan Geister CenTraVac Product
Manager Vertical Markets
Trane 3600 Pammel Creek Road LaCrosse WI 54601
7599 TEL 608 787 3881 FAX 608 787
2204 rgeister_at_trane.com An American Standard
Company
2
Energy Consumption
First Cost
3
Past ...
Annual Energy Cost Conventional Chilled Water
System
4
Low Flow Chilled Water Plant Design A Paradigm
Shift - New Rules of Thumb
  • New rules of thumb
  • 44 ? 41 F chilled water supply
  • 16 F ?T across the evaporator
  • thats at 1.5 gpm/ton
  • 15 F ?T across the condenser
  • thats at 2.0 gpm/ton
  • Resize the cooling tower accordingly

5
Low Flow Chilled Water Plant Design
What are others saying???
  • Kelly and Chan (Vanderweil Engineering)
  • HPAC January 1999 Optimizing Chilled Water
    Plants
  • Chilled water ?T 18 Condenser water ?T
    14.2F
  • With the same cost chillers, at worst, the
    annual operating cost with lower flows be about
    equal to standard flows but still at a lower
    first cost
  • PGE CoolTools
  • Chilled water ?T 12F to 20 F
  • Condenser water ?T 12F to 18 F (multi-stage)

6
EarthWise Chilled Water Systems
  • Good for Business...
  • Offers lower first cost and lower operating cost.
  • Good for the Environment
  • Reduced utility generated greenhouse gas
    emissions.
  • Reduces pumping costs...
  • A low flow, low temp, high efficiency system
  • Leverages todays technology
  • Equipment - Chillers, Controls
  • System options

7
Fundamental Laws
Q m cp ?T
  • Mass (capacity) varies directly with flow
  • Pressure Drop varies with the square of the flow
  • Energy Consumption varies with the cube of the
    flow
  • gt ?T Smaller Pipes Tower
  • lt ?P Smaller Pumps
  • Reduced Operating Costs!

8
The Next Step...
Decoupled System
VPF
9
How have Chillers Reacted to VPF
Traditionally???
Too Fast a change can be a problem
10
But Newer Technology Can Eliminate all Concerns
Stable Chiller Response
11
And... By coupling VPF Systems with
SERIES Evaporators, many
advantages emerge...
Bottom line Chillers very capable today!
VPF Saves
12
System ExamplesSeries Chillers colder water
savings!
LOAD
LOAD
13
How???
CHILLEDWATERRETURN
CHILLEDWATERSUPPLY
41 o F
49 o F
57 o F
105 o F
Run two chillers at 50 or..
56 o F
64 o F
Assuming 85 Entering and 2 GPM/Ton
49 oF
41 oF
14
Even better...Part Load Efficiency
CHILLEDWATERRETURN
CHILLEDWATERSUPPLY
OFF
41 o F
57 o F
57 o F
105 o F
.Run your most efficient chiller
64 o F
41 o F
15
If applicable...Chilled Water Temperature Re-Set
CHILLEDWATERRETURN
CHILLEDWATERSUPPLY
OFF
44 o F
57 o F
57 o F
105 o F
61 o F
And save more s!
44 o F
16
If applicable... AFD Chiller
CHILLEDWATERRETURN
CHILLEDWATERSUPPLY
OFF
41 o F
57 o F
57 o F
And save more s!
IF all three justify the initial capital cost
of the AFD 1. Extensive hours of operation
(24/7, winter cooling) 2. Access to inexpensive
cold condenser water 3. Expensive electricity
(high kWh rates)
17
System Flexibility Options...Absorption Chiller
Technology
CHILLEDWATERRETURN
CHILLEDWATERSUPPLY
41 o F
50 o F
57 o F
18
System Flexibility Options...Screw Chiller
Technology
CHILLEDWATERRETURN
CHILLEDWATERSUPPLY
41 o F
50 o F
57 o F
19
System Flexibility Options...Existing Chiller
Assets
CHILLEDWATERRETURN
CHILLEDWATERSUPPLY
41 o F
50 o F
57 o F
Existing Chiller Assets
20
System Flexibility Options...Plant
ExpansionParallel - Primary Secondary (Decoupled)
50 oF
CHILLEDWATERRETURN
CHILLEDWATERSUPPLY
57 oF
41 oF
21
System Flexibility Options...Plant Expansion
Parallel/Series - Variable-Primary
CHILLEDWATERSUPPLY
50 oF
CHILLEDWATERRETURN
41 oF
57 oF
22
EarthWise Chilled Water Systems
  • Exploit technology!
  • Low flow
  • Low temperature
  • High efficiency
  • Leverage
  • Optimized Controls
  • Variable Primary Flow
  • Series Evaporators

Operating Cost
First Cost
23
always, always,Always Remember
24
W. Ryan Geister CenTraVac Product
Manager Vertical Markets
Trane 3600 Pammel Creek Road LaCrosse WI 54601
7599 TEL 608 787 3881 FAX 608 787
2204 rgeister_at_trane.com An American Standard
Company
Write a Comment
User Comments (0)
About PowerShow.com