1 of 44

FROM WASTE ENERGY�TO BUSINESS VALUE

Turning Energy Losses into Savings, Productivity & New Value

Energy Efficiency • Recovery • Reuse • Monetization

Slamet Ristono, ST. MM

  • Engineering & Maintenance Advisor PT. GRAND INDONESIA
  • Incident Commander
  • Energy Auditor BNSP�

2 of 44

PART I

BACKGROUND & REGULASI

3 of 44

The Energy Paradox

ENERGY PURCHASED

ENERGY USED

Useful work

​

Comfort

​

Production

​

Services

ENERGY WASTED

Heat

​

Exhaust

​

Losses

​

Standby / inefficiency

The opportunity is hidden between “energy purchased” and “useful energy delivered.”

Electricity

​

Fuel

​

Steam

​

Cooling / Heating

​

​

4 of 44

kerangka untuk menilai apakah suatu perusahaan menjalankan bisnis secara berkelanjutan, bertanggung jawab, dan dikelola dengan baik.

Why Waste Energy Is Now a Business Issue

Energy cost ↑

Regulatory pressure ↑

Carbon / ESG expectations ↑

Asset performance expectations ↑

Operational resilience matters more than ever

THE BUSINESS QUESTION

How much energy are we buying?

​

How much are we actually using?

​

How much are we throwing away?

​

How much can be converted into value?

Environmental, Social, and Governance (ESG): kerangka untuk menilai apakah suatu perusahaan menjalankan bisnis secara berkelanjutan, bertanggung jawab, dan dikelola dengan baik.

5 of 44

Indonesia Regulatory Landscape

From compliance to value creation

LAW

  • UU 28/2002 Bangunan Gedung
  • UU 30/2009 Ketenagalistrikan
  • UU 11/2020
  • UU/6/2023 Cipta Kerja

GOV. REG.

  • PP 16/2021 Pelaksana UU Bangunan Gedung
  • PP 33/2023

Konservasi

Energi

​

ESDM

BUILDING

  • Permen PU 2/PRT/M/2015
  • Permen PUPR 1/2021 Tentang Bangunan Gedung Hijau
  • Permen LH 08/2010 Kriteria Bangunan Ramah Lingkungan

​

CORPORATE

  • ESG
  • ISO 50001
  • Net Zero

Regulation is the driver; measurement, projects and business cases turn compliance into economic value.

  • Permen 8 / 2025 Manajemen Energi

​

  • Permen 3 /2025 Konservasi Energi oleh Pemerintah dan Pemerintah Daerah

​

  • Permen 1/2026 Usaha Jasa Konservasi Energi

​

6 of 44

Landasan kebijakan untuk implementasi manajemen energi, efisiensi energi, dan penguatan ekosistem jasa konservasi energi

1

PP No. 33 Tahun 2023

Konservasi Energi

•

Melindungi upaya konservasi energi nasional

•

Mendorong konservasi energi pada pengguna energi, pengguna sumber energi, dan pengusaha energi

•

Mendukung manajemen energi secara efisien & hemat, penghematan, ESCO, pengadaan konservasi, dan kerja sama

2

Permen ESDM No. 8 Tahun 2025

Manajemen Energi

•

Mengatur kewajiban pelaksanaan manajemen energi bagi entitas di sektor tertentu

•

Mendorong efisiensi energi, audit energi, pelaporan aktivitas, serta pemberian dan penghargaan

•

Memuat pembiayaan, sertifikasi kompetensi, skema kredit-karbon

3

Permen ESDM No. 3 Tahun 2025

Konservasi Energi oleh Pemerintah dan Pemerintah Daerah

•

Mengatur peran pemerintah dan pemerintah daerah dalam konservasi energi

•

Mendorong penghematan energi pada bangunan, fasilitas, dan operasional pemerintah

•

Memperkuat peran pemerintah sebagai teladan efisiensi energi

4

Permen ESDM No. 1 Tahun 2026

Usaha Jasa Konservasi Energi

•

Mengatur penyelenggaraan usaha jasa konservasi energi/ESCO

•

Mendorong layanan energi yang efisien, kompetitif, berbasis, dan pemeliharaan

•

Memperkuat ekosistem implementasi proyek konservasi energi

Keterkaitan Regulasi

PP 33/2023 → Permen 8/2025 → Permen 3/2025 → Permen 1/2026

Pesan Utama

Regulasi berawal dari kebijakan umum menuju implementasi teknis�Fokusnya tidak hanya kepatuhan, tetapi juga penghematan biaya dan penurunan emisi. Sinergi regulasi mempercepat transisi energi dan daya saing industri

Regulasi Kunci Konservasi Energi

7 of 44

From Regulatory Compliance to Business Strategy

1 COMPLIANCE

Meet requirements

2 MONITORING

Know consumption

3 EFFICIENCY

Reduce waste

4 OPTIMIZATION

Improve systems

5 RECOVERY

Capture waste energy

6 MONETIZATION

Create value

TARGET:

to

“energy value creation”

move from “energy compliance”

8 of 44

PART II

WHERE IS THE WASTE?

9 of 44

Where Does Energy Go?

Energy in → useful energy + waste energy

Potential source of avoidable loss

  • HVAC / Chiller Plant

​

  • Pumps & Fans

​

  • Lighting

​

  • Hot water / laundry / kitchen

​

  • Lift & escalators

​

  • Boilers / process equipment

​

  • Electrical distribution

​

  • Ventilation & Exhaust

​

10 of 44

Energy Waste Mapping

ENERGY AUDIT

ENERGY BALANCE

WASTE IDENTIFICATION

QUANTIFICATION

RECOVERY

POTENTIAL

BUSINESS CASE

You cannot manage on what you cannot measure.

Measure 🡪 Analyze 🡪 Decide

11 of 44

Energy Balance — Find the Hidden Asset

INPUT

1,000 MWh

USEFUL ENERGY

650 MWh

DISTRIBUTION + EQUIPMENT LOSS

250 MWh

OTHER / WASTE

100 MWh

KEY QUESTION

How much of the 350 MWh “non-useful” energy can be eliminated, optimized or recovered?

That is the opportunity pipeline.

12 of 44

Measurement & Verification

  • Baseline vs actual consumption
  • kWh, kW, fuel and thermal energy
  • COP / kWh per TR
  • Temperature, flow and pressure
  • Runtime and load profile
  • M&V confirms whether savings are real

MEASURE → ANALYZE → VERIFY → IMPROVE

Use ISO 50001 / ISO 50002 / ISO 50015 principles as appropriate.

Build a defensible baseline before claiming savings.

13 of 44

PART III

FROM WASTE ENERGY TO RECOVERY

14 of 44

Five Strategies to Create Value

REDUCE

Eliminate unnecessary demand

OPTIMIZE

Improve system efficiency

RECOVER

Capture waste energy

REUSE

Use recovered energy elsewhere

MONETIZE

Convert savings into business value

The highest-value projects often combine more than one strategy.

15 of 44

Waste Heat Recovery

Example: chiller condenser heat

BEFORE

Chiller

→ Condenser

​

→ Cooling Tower

​

→ Atmosphere

RECOVERY

Chiller

→ Heat Exchanger

​

→ Hot Water

​

→ Storage / Distribution

VALUE

Reduce boiler / electric-heater demand

Reduce cooling tower rejection

Improve overall system efficiency

Reduce OPEX + CO₂

16 of 44

The Business Value Equation

WASTE ENERGY

Heat

​

Exhaust

​

Losses

​

Rejected energy

RECOVERY / EFFICIENCY

Technology

​

Controls

​

Optimization

​

Reuse

BUSINESS VALUE

Energy saving

​

OPEX reduction

​

CO₂ reduction

​

Asset performance

​

ROI / NPV / IRR

Annual Financial Saving = Energy Saving × Applicable Tariff

17 of 44

Decision Framework

TECHNICAL

Feasibility, safety, reliability

FINANCIAL

CAPEX, OPEX, NPV, IRR

OPERATIONAL

Maintainability, uptime, integration

ESG

Energy, carbon, reporting

STRATEGIC

Scalability, resilience, reputation

18 of 44

PART IV

IMPLEMENTATION

Case Study Energy Audit

​

19 of 44

Temperature, Humidity & Water Flowrate Measurement

entering, leaving the evaporator

Chiller Unit

a.

Performing Installation 4 sets of data loggers (temperature, Humidity sensors) in operational conditions:

Cooling Tower

b.

water in, water out

air in, air out

Chiller Unit

a.

Performing Installation 3 sets of Ultrasonic Water Flow Meter (UWFM) in operational conditions:

Chiller Plant

b.

leaving evaporator

1

2

leaving header evaporator

Delivery:

ΔT Evaporator (°C)

3

ΔT Condensor (°C)

Water Flowrate Evaporator (GPM)

Water Flowrate Condenser (GPM)

Methodology Of VAC Audit

ambient

entering condensor

entering condensor

ambient

Temp. (°C). RH Ambient (%)

20 of 44

Power Quality Analyzer & IR-Thermography Measurement

Electrical distribution panel

Chiller Unit

a.

Performing Installation 2 sets of Power Quality Analyzer (PQA) in operational conditions

Chiller Plant (Main Panel CHWPp, Main panel CHWPs dan main panel CWP & CT)

b.

1

Delivery:

Power (Watt)

Voltage (Volt)

Current (Ampere)

KVAR & KVA

Power Factor

Frequency

THDF Current

THDF Voltage

physical thermal profile of the panel

3

IR – Thermography inspection

2

VAC SYSTEM AUDIT

Electrical distribution panel

21 of 44

22 of 44

PART V

RESULT AUDIT

23 of 44

PART V

NAME PLATE CHILLER PLANT

24 of 44

ITEM

DESCRIPTION

Chilled Water Pump Primer (CHWPp)

Merk

EBARA

Model

300 x 250 CNGA

Power

5 x 90 KW - (Standby 1 unit)

Waterflow Capacity

5 x 3,740 GPM

Head

80 ft

ITEM

DESCRIPTION

Condenser Water Pump (CWP)

Merk

EBARA

Model

400 x 350 CNFA

Power

5 x 185 KW - (Standby 1 unit)

Waterflow Capacity

5 x 7,000 GPM

Head

80 ft

ITEM

DESCRIPTION

Chilled Water Pump Secondary (CHWPs) Zone 1

Merk

EBARA

Model

250x150 CNJA

Power

2 x 150 KW - (Standby 1 unit)

Waterflow Capacity

2 x 2,180 GPM

Head

240 ft

Chilled Water Pump Secondary (CHWPs) Zone 2A & 2B

Merk

EBARA

Model

300 x 250 CNHA

Power

3 x 335 KW - (Standby 1 unit)

Waterflow Capacity

3 x 5,800 GPM

Head

180 ft

Chilled Water Pump Secondary (CHWPs) Zone 3 & 4

Merk

EBARA

Model

300 x 200 CNJA

Power

2 x 250 KW - (Standby 1 unit)

Waterflow Capacity

2 x 3,760 GPM

Head

180 ft

NAME PLATE CHILLER PLANT

25 of 44

Evaporator

Leaving

Entering

ΔT Temp

Water

flowrate

[°C]

[°C]

[°C]

[GPM]

Chiller - 1

6.57

11.59

5.01

3345.60

Chiller - 2

6.97

11.87

4.91

3349.81

Chiller - 3

6.92

11.76

4.84

3188.70

Chiller - 4

6.99

11.72

4.72

3415.49

Total

​

​

​

13299.6

RINGKASAN PERFORMA CHILLER UNIT 1-4

Condenser

Leaving

Entering

ΔT Temp

Water

flowrate �

[°C]

[°C]

[°C]

[GPM]

Chiller - 1

33

30

3.46

5229

Chiller - 2

34

30

3.30

5287

Chiller - 3

34

30

3.40

4889

Chiller - 4

34

31

3.28

5371

Total

​

​

​

20776

CHILLER UNIT�WDC 126 CAACM

Design

Actual working load

Chiller-1

Chiller-2

Chiller-3

Chiller-4

TOTAL

Cooling Capacity [TR]

2100.00

1258.29

1231.33

1156.59

1209.78

4856.00

Power [kW]

1183.10

991.35

882.85

894.88

845.67

3614.75

Heat Rejection [TR]

2662.67

1358.26

1307.82

1247.19

1318.93

5232.21

Loads Cooling Capacity [%]

100%

60%

59%

55%

58%

58%

Efficiency

 

 

 

 

 

 

KW/TR Chiller Unit

0.563

0.790

0.718

0.781

0.703

 

COP Chiller Unit

6.24

4.45

4.90

4.51

5.00

 

26 of 44

Audit Energi HVAC I Bandara Soekarno Hatta T-3

11/09/2026

RINGKASAN PERFORMA COOLING TOWER

COOLING TOWER�KMB-2600R

Design

Actual working load

CT-1

CT-2

CT-3

CT-4

TOTAL

Cooling Capacity [TR]

2626.67

1366.08

1365.48

1217.21

1300.07

5248.84

Water flow rate [GPM]

6996.16

5049.88

4965.13

4939.83

4862.66

19817.49

Water Inlet [°C]

36.00

34.14

33.58

32.33

33.34

 

Water Oulet [°C]

31.00

30.53

29.92

29.05

29.78

 

Performance Heat Rejection

 

 

 

 

 

Loads Cooling Capacity [%]

100%

52%

52%

46%

49%

49%

Cooling Tower

Temp Water in

Temp Water Out

Water flowrate

[°C]

[°C]

[GPM]

Design [GPM]

Percentage [%]

Cooling Tower - 1

34

31

5049.88

6996.16

72%

Cooling Tower - 2

34

30

4965.13

6996.16

71%

Cooling Tower - 3

32

29

4939.83

6996.16

71%

Cooling Tower - 4

33

30

4862.66

6996.16

70%

TOTAL

​

​

19817.49

27984.63

71%

27 of 44

11/09/2026

RINGKASAN PERFORMA CHILLER PLANT

CHILLER PLANT

Design

Weekday

Weekend

Actual working load

Percentage [%]

Efficiency�[kW/TR]

Actual working load

Percentage [%]

Efficiency �[kW/TR]

Cooling Capacity [TR]

8400.00

4749.68

57%

1.130

4982.38

59%

1.054

Power [kW]

6999.99

5343.95

77%

5232.06

75%

Heat Rejection [TR]

10650.68

5043.98

47%

5340.06

50%

No

Panel

​

Power (kW)

​

​

Maksimal

Rata-Rata

Minimal

1

LV-8A1

​

​

629.70

383.63

98.40

2

LV-8B1

​

​

882.80

567.00

215.20

3

LV-8H1

​

​

1237.10

944.38

637.50

Average Total Power Chiller :

3552.21 kW

Average Power Pump & Cooling Tower :

1729.43 kW

Unit

Design (kW)

Chiller Unit

4732.4

Cooling Tower

97.5

CHWPs

1070

CHWPp

360

CWP

740

TOTAL

6999.9

Ringkasan PQA Panel LVMDP (Distribusi: Pompa CHWPp, CHWPs, CWP, Cooling Tower & Utility)

28 of 44

RINGKASAN PENGUKURAN TERHADAP DESAIN

Chiller Unit

Chilled Water Pump primary (CHWPp)

Chilled Water Pump Secondary (CHWPs)

Unit

Water flowrate�Evap [GPM]

Water flowrate�Evap [GPM]

Load Capacity�[TR]

Unit

Water flowrate�[GPM]

Actual  

Unit

Water flowrate�[GPM]

Actual Running 

Chiller - 1

3,700

3,700

2,100

CHWPp - 1

3,740

3,740

CHWPs - (Zone 1)-1

2,180

2,180

Chiller - 2

3,700

3,700

2,100

CHWPp - 2

3,740

3,740

CHWPs - (Zone 1)-1.1

2,180

standby

Chiller - 3

3,700

3,700

2,100

CHWPp - 3

3,740

3,740

CHWPs - (Zone 2A & Zone 2B)-1

5,800

5,800

Chiller - 4

3,700

3,700

2,100

CHWPp - 4

3,740

3,740

CHWPs - (Zone 2A & Zone 2B)-2

5,800

5,800

Chiller - 5

3,700

 standby

standby 

CHWPp - 5

3,740

standby 

CHWPs - (Zone 2A & Zone 2B)-3

5,800

standby 

​

CHWPs - (Zone 3 & Zone 4)-1

3,760

3,760

CHWPs - (Zone 3 & Zone 4)-2

3,760

standby 

TOTAL

18,500

14,800

8,400

 

18,700

14,960

 

29,280

17,540

Actual Measurement AVG

13,300

4,856

 

 

 

13,949

Dev

1,500

3,544

3,591

Percentage

90%

58%

80%

29 of 44

COOLING LOAD CHILLER PLANT (CH 1 - CH 4) - WEEKDAY

30 of 44

COOLING LOAD CHILLER PLANT (CH 1 - CH 4) - WEEKDAY

31 of 44

PERFOMANCE CHILLER PLANT (CH 1 - CH 4) - WEEKDAY

32 of 44

PART VI

PERFORMA AHU

33 of 44

Audit Energi HVAC I Bandara Soekarno Hatta T-3

33

11/09/2026

RINGKASAN PERFORMA ACTUAL LOAD PER ZONE & BTU/h/m2

Cooling Capacity. per Zone

Design AHU

Weekday

Weekend

Actual working load

Percentage [%]

Actual working load

Percentage [%]

Zone 1 [TR]

1158.18

689.58

60%

732.84

63%

Zone 2A & 2B [TR]

6054.30

2951.57

49%

3065.60

51%

Zone 3 & 4 [TR]

2013.39

1108.54

55%

1151.43

57%

TOTAL

9225.87

4749.68

51%

4949.87

54%

Zone

Area

Design

Actual working load

Weekday

Weekend

[m2]

[BTUH/m2]

[BTUH/m2]

Percentage [%]

[BTUH/m2]

Percentage [%]

Zone 1

24,968.42

556.63

331.42

59.5%

352.21

63%

Zone 2A & 2B

77,195.18

941.14

458.82

48.8%

476.55

51%

Zone 3 & 4

39,289.92

614.93

338.57

55.1%

351.67

57%

Average Zone

704.23

376.27

53%

393.48

56%

34 of 44

MEASUREMENT AHU

SAMPLING MEASUREMENT 47 AHU

Water Side

Air Side

ΔT Temp

Design Water flowrate [GPM]

Measurement Water flowrate�[GPM]

Design Load Cap [TR]

Measurement Load Cap�[TR]

Design Debit [CFM]

Measurement Debit�[CFM]

Zone 1

4.09

1,334

1,811

822

489

212,600

72,717

Zone 2A & 2B

3.92

1,955

2,011

1,104

779

268,610

79,739

Zone 3 & 4

2.93

2,911

3,896

1,641

823

435,040

161,646

 TOTAL

6,200

7,718

3,567

2,092

916,250

314,102

Dev

 

 

(1,518)

 

1,475

 

602,148

Percentage

 

 

124%

 

59%

 

34%

RINGKASAN HASIL PENGUKURAN AHU TERHADAP DESAIN

Rasio Kebutuhan Aliran Udara Terhadap Kapsitas Pendinginan

Total AHU Debit (CFM)

Aktual CFM/TR

Design CFM/TR

Improvement CFM/TR

Measurement

Improve as Per Design

Efisiensi Cost / Tahun

150,14

256,87

0,42

2.092,00

2.961,19

Rp407.716.865

35 of 44

Summary 47 Unit AHU terukur

Water Flowrate [GPM]

Cooling Capacity [BTU/h]

Air Flow [CFM]

Design

Actual

Percentage

Design

Actual

Percentage

Design

Actual

Percentage

Zone 1

1,470

1,661

113%

9,925,200

5,870,907

59%

212,600

72,717

34%

Zone 2A & 2B

1,955

2,301

118%

13,196,250

8,405,067

64%

268,610

79,739

30%

Zone 3 & 4

2,911

3,896

134%

19,646,550

9,877,794

50%

435,040

161,646

37%

TOTAL

6,336

7,858

124%

42,768,000

24,153,768

56%

916,250

314,102

34%

RINGKASAN HASIL PENGUKURAN KINERJA AHU SAMPLING SEMUA ZONE

36 of 44

PART VII

FROM ENERGY TO MONEY

37 of 44

CURRENT CHILLER PLANT PERFORMANCE = 1.13

Chiller Plant Efficiency Benchmark – Reference: ASHRAE Journal

Actual Chiller Plant Efficiency = 1,09 kW / TR

Chiller Plant Efficiency Target = 0,83 kW / TR

38 of 44

TECHNICAL DATA SHEET - DAIKIN

Actual Chiller Performance 0,75kw / TR

39 of 44

PERHITUNGAN OPTIMALISASI EFISIENSI KINERJA UNIT CHILLER

Pengurangan emisi:

Setara dengan penyerapan karbon oleh 14,8 ribu pohon/tahun

Index:

  • Faktor emisi mengikuti Kepmen ESDM 163.K/HK.02/MEM.S/2021 sebesar 0,87 ton CO2/MWH
  • Kemampuan serapan CO2 dari U.S EPA 1 pohon = 0,05 ton/CO2/bulan/pohon

Unit Chiller

Kapasitas

Daya

Efisiensi Chiller

Efisiensi Cost / Tahun

Energi Efisiensi / Tahun (kWH)

Pengurangan Emisi / Bulan (ton CO2/Tahun)

Design (kW/TR)

Performance Existing (kW/TR)

Improvement Performance (kW/TR)

Chiller 1

2100

1.183,10

0,56

0,79

29%

Rp2,74 Miliar

2.384.830

2.741

Chiller 2

2100

1.183,10

0,56

0,72

22%

Rp1,87 Miliar

1.627.137

1.870

Chiller 3

2100

1.183,10

0,56

0,78

28%

Rp2,63 Miliar

2.290.118

2.632

Chiller 4

2100

1.183,10

0,56

0,70

20%

Rp1,65 Miliar

1.437.713

1.653

​

​

​

​

​

Total

Rp8,9 Miliar

7.739.798

8.896

40 of 44

PERHITUNGAN OPTIMALISASI EFISIENSI KINERJA CHILLER PLANT

​

Pengurangan emisi:

Setara dengan penyerapan karbon oleh 18 ribu pohon/tahun

Index:

  • Faktor emisi mengikuti Kepmen ESDM 163.K/HK.02/MEM.S/2021 sebesar 0,87 ton CO2/MWH
  • Kemampuan serapan CO2 dari U.S EPA 1 pohon = 0,05 ton/CO2/bulan/pohon

Unit Chiller

Kapasitas

Daya

Efisiensi Chiller

Efisiensi Cost / Tahun

Pengurangan Emisi / Bulan (ton CO2/Tahun)

Design (kW/TR)

Performance Existing Weekday (kW/TR)

Performance Existing Weekend

Improvement Performance (kW/TR)

Chiller 1-4

8400

6.999,99

0,83

1,13

1,05

23%

Rp13.368.741.173

10.865

​

​

​

​

​

​

Total

Rp13.368.741.173

10.865

41 of 44

PERHITUNGAN OPTIMALISASI EFISIENSI KINERJA UNIT POMPA SEKUNDER

Pengurangan emisi:

Setara dengan penyerapan karbon oleh 934pohon/tahun

Index:

  • Faktor emisi mengikuti Kepmen ESDM 163.K/HK.02/MEM.S/2021 sebesar 0,87 ton CO2/MWH
  • Kemampuan serapan CO2 dari U.S EPA 1 pohon = 0,05 ton/CO2/bulan/pohon

Unit Chiller

Actual Flowrate (GPM)

Design Flowrate (GPM)

% Improvement Optimation

Daya

Efisiensi Cost / Tahun

Pengurangan Emisi / Bulan (ton CO2/Tahun)

Pompa Sekunder

7858

6336

24%

1.070,00

Rp1.479.975.689

46,69

​

​

​

​

​

Rp1.479.975.689

46,69

42 of 44

Achievement

Indikator

Achievement / Year

Energy Reduction

20.422.276 kWH

Pencapaian Efisensi

  • Chiller Plant = 0,83 kW/ TR
  • Chiller = 0,56 kW / TR

Pengurangan biaya energi

Rp 24,15 miliar

Pengurangan emisi

20.322 Ton CO2/ Tahun

Setara penyerapan karbon oleh pohon

34.383 pohon

43 of 44

DON’T JUST REDUCE ENERGY COST.

CREATE VALUE FROM ENERGY.

FROM WASTE ENERGY → BUSINESS VALUE

​

Financial value • Operational value • Strategic value

​

  • Measure it.

​

  • Understand it.

​

  • Recover it.

​

  • Reuse it.

​

  • Monetize it

44 of 44