Used Pasilac Therm for sale (3,819)

Year of construction: 2018, condition: good (used), heating cooling device HB Therm 160 Z2 Serie 5 Water, 160°C 17 KW year: 2017-2018 Hnodpjk Tapwefx Ag Nju price: 5.950 € contact: Mr. Rainer Eckerle

Condition: as good as new (ex-display), Year of construction: 2011, operating hours: 212 h, functionality: fully functional, This temperature control unit has a total operating time of 212 hours. It was used during the introduction of an experimental product, which is why the operating hours are relatively low. All components are original factory parts. The units are in perfect technical and aesthetic condition. Hungarian-language documentation is included. It also supports connections for J, K, T, or Pt100 type thermocouples. Additionally, it features a digital RS232 communication interface. Hsdpow Hhvyefx Ag Nsnu

Condition: ready for operation (used), Year of construction: 1999, Peripheral devices Hnedpowuvh Hefx Ag Nou HB-THERM TYPE: HB-CW 90 4 units Year of manufacture: 1998-1999

Year of construction: 2021, operating hours: 100 h, condition: like new (used), The chamber furnace is best suited for preheating, drying, curing and other thermal treatment processes of various materials in the temperature range from 50⁰C to 150°C. We can highly recommend this furnace as ammunition dryer. Chamber volume: 7392 Chamber dimensions: 2200x1400x2400mm (WxDxH) Outer dimensions: 3050x2700x2720mm (WxDxH) Maximum temperature: 160 Heating power: 54kW Hnodpjlk Hiiofx Ag Neu Total power: 59kW Own weight: 2800kg

Year of construction: 2018, condition: good (used), heating cooling device180 Z2 Serie 5 Water, 180°C 17 KW New Service ! price: 7.950 € contact: Mr. Rainer Eckerle Hnodpfxsk Tap Ts Ag Nju

Year of construction: 2001, condition: good (used), HB Therm 140 U1 Series 4 Water, 140°C 9 KW year: 2001-2005 overhold ! price: 1.650 € contact: Mr. Rainer Eckerle Hedpewl Ingjfx Ag Nsnu

Condition: used, mileage: 153,517 km, power: 103 kW (140.04 HP), fuel type: diesel, gearing type: mechanical, overall weight: 3,500 kg, first registration: 07/2022, next inspection (TÜV): 06/2026, emission class: euro6, Equipment: air conditioning, central locking, electronic stability program (ESP), Without rear doors, tail lift lockable. Refrigerant R134a, without tachograph. No ATP (Fresh Service). Thermo King maintenance contract! July 2025: Turbocharger, cylinder head, timing belt replaced. Front-wheel drive 2.0 litre, reinforced front axle, 520A (92Ah) battery, second battery (AGM) with isolating relay, electrically adjustable and heated exterior mirrors, Climatic air conditioning, single passenger seat, hill start assist, emergency brake assist, all-season tires, Media Van Advanced package, mobile phone interface, voice control, reversing camera with extra monitor, HACCP certification, TK-TracKing telematics (BlueBox), 1 telescopic locking bar (horizontal), 6 clamping bars with rubber base, CoolerBox2.0 FRESH SERVICE without rear doors, flap at the top of the rear portal, fixed tail lift Dautel DFL 750 incl. anti-roll locks_DSN21-04278, internal lashing rail mounted, 3-piece sliding curtain system permanently installed on rear portal. Hnodoxbmlgjpfx Ag Neu

Condition: used, mileage: 189,142 km, power: 103 kW (140.04 HP), fuel type: diesel, gearing type: mechanical, overall weight: 3,500 kg, first registration: 04/2022, next inspection (TÜV): 04/2026, emission class: euro6, Equipment: air conditioning, central locking, electronic stability program (ESP), Without rear doors, tail lift enclosed. Refrigerant R134a, without tachograph. ThermoKing maintenance contract! Front-wheel drive 2.0 L, reinforced front axle, 520A (92Ah) battery, second battery (AGM) with isolating relay, electrically adjustable and heated exterior mirrors, Climatic air conditioning, passenger single seat, hill start assist, emergency brake assist, all-season tires, Media Van Advanced package, mobile phone interface, voice control, reversing camera, HACCP certification. TK-TracKing telematics (BlueBox), 1x telescopic load bar crosswise, CoolerBox2.0 for fresh goods distribution without rear doors, flap at the top of the rear portal, fixed Dautel DFL 750 tail lift incl. anti-roll guards_DSN21-04277, internal lashing rails mounted, 3-piece sliding curtain system permanently mounted on the rear portal. Hnedpoxbmlasfx Ag Nsu

Year of construction: 2022, condition: new, new! Hnodpslrtdbjfx Ag Neu Roof cutout dimension: 2.350 x 13.000mm Lighting strip order dimension: 2,550 x 13,311mm

Condition: ready for operation (used), Year of construction: 2023, functionality: fully functional, empty load weight: 2,000 kg, input voltage: 400 V, input frequency: 50 Hz, EPS shredder with the following components: Styrofoam pre-shredder KSTAS Styrofoam fine mill KH3 Finished product system TW200FPA Hnodexly Euspfx Ag Nou Industrial silo for EPS storage Blower Pipe system The new price of the machine in 2023 was approximately €90,000. MACHINE DETAILS Electrical specifications Power: 8 kW Voltage: 400 V Frequency: 50 Hz Rated current: 16 A Dimensions & weight Dimensions (L×W×H): 4.00 × 2.00 × 3.50 m Net weight: 2,000 kg

Condition: used, This listing is for the Thermo Scientific Finnpipette F1 Pipette 8 Channel Hnodpoxl Ezhsfx Ag Nou The unit is in full working condition and is ready for immediate use The Thermo Scientific Finnpipette F1 manual pipettes designed for precision, ergonomics, and ease of use in laboratory settings. Available here in a multichannel configurations, the Finnpipette F1 caters to a wide range of liquid handling needs. Key Features Ergonomic Design: Lightweight handle with low plunger and tip attachment forces to reduce the risk of repetitive strain injuries (RSI). Silent Volume Adjustment: Features a silent and lighter volume adjustment mechanism with over 50% lower forces compared to earlier models. Secure Volume Lock: A secure volume setting prevents undesirable volume drift during operation. Simply lift the plunger up to set volume and press down to lock in place with minimum effort. Adjustable Finger Rest: The 120° adjustable finger rest accommodates both right- and left-handed users, allowing the hand to relax during pipetting cycles. Super Blow-out: 150% increase in air boost to ensure efficient delivery of micro-volumes and prevent capillary action in 50 µL models and below. Compatible Tips: Designed to work seamlessly with Thermo Scientific Finntip pipette tips for optimal performance.

Year of construction: 2005, condition: used, Analysis device, rheometer, viscometer, Modular Advanced Rheometer System -Condition: untested, function not guaranteed -Scope of delivery: according to pictures Hodpfxexm U S Ej Ag Njnu -Manufacturer: Thermo Electron Haake Mars, Modular Advanced Rheometer System -Haake Universal Controller: Thermo Electron Type Haake Universal Temperature Controller: Thermo Electron type Dimensions: 1070/450/H860 mm -Weight: 86 kg

Condition: good (used), functionality: fully functional, A Thermobend 2000 is a bending machine used for bending plastic sheets such as PMMA (acrylic glass) and methacrylate. The machine operates with heating wires to heat and bend the sheets at specific locations. Key features Capacity: The machine has a usable length of 2000 mm. Functionality: Can bend sheets with a thickness of 1 mm to 20 mm. Configuration: Equipped with 2 bending beams heated both from above and below. The distance between the wires is adjustable, with 3 wires above and 3 below per group. Hjdpfxoxn T Nro Ag Nsnu Dimensions: Length: 3200 mm x Width: 1000 mm x Height: 1600 mm Please note: The information on this page has been obtained and compiled to the best of our knowledge, but accuracy cannot be guaranteed. Accordingly, it does not constitute a representation or contract, and we recommend verifying all relevant details. Financial information VAT/margin: Margin: The listed price includes VAT (VAT is non-deductible for businesses).

Year of construction: 2001, condition: good (used), 1 used hardening furnace Manufacturer: Nabertherm, Type N 321 Serial Number: 160897, Year of manufacture: 2001, Max. temperature: 1,200°C, Connected load: 400V, 47 kW Hedpfxsxpf I No Ag Nsnu Internal dimensions: 750 x 1100 x 400 mm Usable volume: 320 liters Weight: approx. 1.6 t Dimensions: Length approx. 2 m, width approx. 1.5 m, height approx. 2 m,

Condition: excellent (used), Year of construction: 2014, functionality: fully functional, Mecatherm Baguette Line Brand: MECATHERM – Model: TRADIVIDER RT II * Dough dividing from 200 g to 1000 g * Output up to 1700 kg/h for highly hydrated doughs and long proofing times Dough divider hopper – Capacity: 250 kg for pre-portioning of 15 kg Divider – Brand: MECATHERM – TRADIVIDER Type 32/16, including: * 1 sorting hopper – Capacity: 300 liters * 1 multi-piston dividing chamber on a swing frame Hnsdpfx Ajxn Iruog Nou * 1 swing frame drive system * 1 pin-type dough gripper * 1 dough piece receiving conveyor * 1 discharge conveyor * Dividing range: 200/400 g with 32 pistons – Capacity: 1360 kg dough per hour * Dividing range: 350/1000 g with 16 pistons – Capacity: 1700 kg dough per hour Electrical equipment Dusting machine * Complete flour dusting of the dough with reclamation of excess flour Intermediate Proofing and Resting Block Brand: MECATHERM – Model: RTH, including: * 1 inclined conveyor – Width: 400 mm with curve and discharge belt on the first level * 1 automatic station for pre-proofing, moulding, scoring, elongating, and depositing on honeycomb trays * At the end of the conveyor: 1 6-tray stacker with grissini to enhance operator efficiency * Mesh return conveyor under the RT block Output for long loaves and baguettes: up to 2,500 loaves per hour; for small breads: 5,000 to 12,500 pieces per hour Portioning area for long dough pieces: 2, 3, 4, 5, or 6 portions Maximum length of long dough pieces: 800 mm * RT block length: 8.17 m * RT block width: 1.41 m * RT block height: 3.05 m Line in good condition when production ceased in May 2021 – currently disassembled and stored in containers Commissioned at the beginning of 2014 Delivery and commissioning available upon request

Condition: used, Temperature: 950°C Hnsdpfxsxnzcge Ag Neu Useable Dimensions (L x W x H): 5.000 x 2.600 x 1.100 mm

Condition: used, This listing is for a Thermo Scientific Dionex AS-DV Autosampler. The unit is in full working condition and is ready for immediate release. Please note that ULM do not check or guarantee the provision of software Software Thermo Scientific Chromeleon 7 license key usb- Built for the lab and IT, Chromeleon CDS chromatography software enables both productivity and regulatory compliance with automated controls, data analysis, and security tools. The Thermo Scientific™ Dionex™ AS-DV Autosampler is an innovative solution for automating sample handling in routine ion chromatography applications. It’s designed to enhance productivity while maintaining cost-effectiveness, perfect for labs focused on ion and water analysis. Key Features: Automated Sample Handling: Random Access and Flexibility: Offers random access for multiple injections and filtration, allowing labs to run samples efficiently without manual intervention. High Reproducibility: Ensures consistent results thanks to precise mechanics that control dispense speed and volume. User-Friendly Control: Hnsdpfx Agsxhf Utj Nju Please note that ULM not to check the software and cannot guarantee the provision Chromeleon™ CDS Software: The powerful software simplifies programming for injection loops and concentrator columns, allowing users to easily set optimal parameters. Advanced Sample Preparation: Optional Six- or Ten-Port Valve: This feature facilitates complex sample preparation techniques, including matrix elimination and sample concentration, enhancing analytical capabilities. Performance & Compatibility: Needle and Flow Path: Constructed from all-Thermo Scientific™ PEEK™, ensuring durability and minimal contamination. Vial Compatibility: Works with 5.0 mL and 0.5 mL polymeric vials, and filter caps can be used for automatic filtration, promoting better results. Injection Volume Range: Supports injection volumes from 0.1 to 5 mL, accommodating various experimental needs. Sample Capacity: Can hold up to 50 vials of either size or a mix of vials, adding to its versatility. Specifications: Dimensions: Height: 9 in (23 cm) Width: 17.5 in (44.45 cm) Depth: 22 in (56 cm) Weight: 16 kg Speed Control: Adjustable from 0.1 to 5.0 mL/min in 0.1 mL/min increments. Voltage: Compatible with 100/240 V. Compatibility: Works seamlessly with various ICS systems, including ICS-5000, ICS-2100, ICS-1600, ICS-1100, ICS-900, and legacy IC systems.

Condition: good (used), Plasma cutting machine, plasma cutter, for plasma cutting system -Manufacturer: Hypertherm -Type: HySpeed HT2000LHF -Equipment: with hose package and cutting nozzle head Hnsdpowd Tg Ssfx Ag Nsu -Max. cutting current: 200 A -Dimensions: 1100/720/H1040 mm Weight: 459 kg

Condition: excellent (used), Year of construction: 2013, Plasma cutting machine manufactured by Cloos for processing sheet material and pipes. Program operating hours: 1,687 hours, very low operating hours. Large-format plasma cutting system. Cutting system: Cloos Quirox Plasma source: Hypertherm Program operating hours: 1,687 hours, very low operating hours. Performance data: Cutting capacity (non-alloyed steel): - Burr-free cutting: 32 mm - Piercing (production): 38 mm - Maximum cutting capacity: 64 mm Cutting capacity (alloyed steel): - Piercing (production): 32 mm - Maximum cutting capacity: 50 mm Cutting capacity (aluminium): - Piercing (production): 25 mm - Maximum cutting capacity: 50 mm Including complete extraction unit Hodpjxn Ihpsfx Ag Nsnu With guard and enclosure

Condition: used, This listing is for the Thermo Scientific Finnpipette. 0.5ml The unit is in full working condition and is ready for immediate use The Intuitive menu and simple button layout, allow you to choose all the pipetting functions you need quickly and easily. The large display is easy to read and shows the full names of all functions. Easily accessible menu offers 10 different pipetting functions and 9 pipetting speeds to handle a wide variety of pipetting applications. Select common functions such as forward, reverse, diluting, and stepper pipetting or advanced functions like mixing, sequential stepping, or program up to 9 of your own functions. Solid-shaped and perfectly balanced handle fits comfortably and securely in your hand, and together with the finger rest, it keeps pipetting stress and exertion to a minimum. Ergonomically designed to let your index finger control dispensing with just a soft press Hnsdpfoxhf Nqsx Ag Nsu of the button. Adjust the finger rest a full 120° of movement to fit your hand exactly— whether you’re left- or right-handed. Very low tip ejection force minimizes strain on your thumb.

Condition: used, This listing is for the Thermo Scientific Precision CIR19 Heated Circulating Bath The unit is in full working condition and is ready for immediate use The Precision CIR‑19 is a robust and reliable lab tool tailored for high-precision temperature-sensitive workflows. Its strengths include excellent uniformity, precise digital control, safe operation features, and ease of maintenance. Whether you're incubating samples or performing delicate assays, it’s built to deliver consistent, reproducible results Hnodpfjxhfpwjx Ag Neu Overview & Applications The Precision CIR‑19 is a high-performance 19 L (5 gal) circulating water bath engineered for applications demanding strict temperature uniformity and control—think enzyme reactions, serological assays, or any sensitive method where thermal consistency matters. Key Features Perimeter-directed water flow for superior temperature uniformity. Coil-free internal design, making cleaning and maintenance a breeze. Microprocessor-based digital control, displayed via a monochrome LCD. Auto-on/auto-off timers and audible alarms, enhancing scheduling and safety. Low-fluid (dry-run) protection, guarding against overheating or damage. Hinged lid with extended height, ideal for accommodating taller labware. Supplied with a stainless steel gable cover, diffuser tray, and the quirky but useful rubber duck.

Condition: used, This listing is for the Thermo Scientific Vanquish UHPLC Sytem The unit is in full working condition and is ready for immediate use Overview: Thermo Scientific Vanquish UHPLC Systems 1. Autosampler Purpose: Introduces the sample into the mobile phase stream automatically. Hnjdoxhfkzopfx Ag Nju Picks up sample from vials, plates, or tubes Injects with high precision (often nL to µL volume range 2.Pump Module Purpose: Delivers the mobile phase (solvent) through the system at high pressure. Binary pump: Mixes two solvents at high pressure. Ideal for fast gradients. Quaternary pump: Mixes up to four solvents at low pressure. More flexible, but slower gradients. Controls flow rate (e.g., 0.001–5.000 mL/min) Enables gradient elution (changing solvent composition over time 3.Detector Module (x2) Purpose: Detects and measures analytes as they elute from the column. Diode Array Detector (DAD/UV-Vis) – most common; detects UV-absorbing compounds Fluorescence Detector – for fluorescent compounds Charged Aerosol Detector (CAD) – universal detection for non-UV compounds Refractive Index Detector – for sugars, polymers MS (Mass Spectrometer) – advanced, highly sensitive detection Thermo Fisher’s Vanquish platform includes several variants tailored to different analytical needs—from routine HPLC to ultra-high-throughput and low-flow LC–MS workflows: Vanquish Flex UHPLC: Offers flexible HPLC/UHPLC method development and operates up to 1000 bar. It supports binary, quaternary, and dual pumps, plus intelligent tools like solvent monitoring and optional touchscreen interface. Vanquish Horizon UHPLC: Built for maximum performance, offering ultra-high pressure (up to 1500 bar), ultra-low gradient delay volume, biocompatible flow paths, and exceptional retention time stability and detector sensitivity. Vanquish Neo UHPLC: Designed for next-gen low-flow LC‑MS workflows (nano‑ to micro‑flow), delivering high‑sensitivity, high‑robustness separations. Vanquish Analytical Purification LC: Specialized for precise fractionation—high pressure (700–1500 bar), customizable flow (up to 10 mL/min), integrated fraction collector, multimodal detection, and advanced automation. Key Features Across the Platform Modular Design: Choose components (pumps, samplers, detectors, thermostatting units) to configure a tailored system. Most models offer biocompatible flow paths and Viper fingertight fittings for low dead‑volume, tool‑free setup. Temperature Control: High-performance column compartments with active/passive heating, pre‑heating, and post‑column cooling to manage frictional heating and improve reproducibility. Detection Options: Available detectors include Diode Array (with LightPipe optics for superb sensitivity), Charged Aerosol Detector (CAD) for near‑universal detection, fluorescence, multi‑wavelength, refractive index, and mass spectrometry detection. Software Integration: Fully compatible with Chromeleon CDS (with SII for streamlined MS integration), plus Xcalibur and TraceFinder for LC‑MS workflows. MS Integration: Vanquish systems interface seamlessly with Thermo MS platforms—Triple Quadrupole and Orbitrap—for sensitive, accurate mass analysis. Operational ROI: Thermo highlights reduced unplanned repairs, improved productivity, and net-zero ambitions through renewable-powered manufacturing.

Condition: used, This listing is for the Thermo Scientific Nicolet IS050-IR Spectrometer + 2 Packs accessories Hnsdpoxhfknofx Ag Nju The unit is in full working condition and is ready for immediate use An advanced FT‑IR spectrometer designed as an all‑in‑one materials‑analysis workstation. It’s built to provide definitive answers in analytical workflows, offering lab-ready versatility and performance. News-Medical Marketed as the first research-grade FT‑IR with one‑touch operation, delivering access to multiple techniques with minimal manual intervention Key Features & Capabilities Hardware Highlights: Dual-source capability—includes both a durable Polaris IR source and a tungsten-halogen white light source. Three detectors in the main sample compartment, plus high-resolution optics as standard. Gold reflective optics by default (aluminium available), plus a validation wheel and motorised energy screens for tuning intensity. Optional motorized purge shutters, optical filters, and polarizers, along with selectable beam configuration (collimated or focused). Expandable Module Options: You can easily expand capabilities—without swapping hardware—using “one-touch” modules: Diamond ATR (Attenuated Total Reflectance) covers mid- and far‑IR spectra. Automated Beamsplitter Exchanger (ABX) allows automatic switching between IR ranges. Raman accessory—placed in the sample compartment—enabling video‑guided, fluorescence‑free Raman spectroscopy. Near-Infrared (NIR) module with integrating sphere and fiber‑optic options for bulk solid/liquid analysis. TGA‑IR and GC‑IR modules—integrate with thermal or gas chromatography systems for in-depth material identification. TEC-MCT (thermoelectrically cooled) detectors for high-speed, sensitive IR detection without liquid nitrogen. Performance & Usability: Spectral range spans from far-IR to near-IR and even into the visible, with resolution better than 0.09 cm⁻¹. Automated performance verification using NIST-traceable standards ensures accuracy and consistency. Cloud-enabled data access via Thermo Fisher Connect and OMNIC Anywhere app—sync, share, and analyze spectral files remotely on any device. Ideal Applications The system is suitable for an impressive range of fields, including: Polymers and rubbers Forensic analysis Pharmaceuticals Pigments, paints, inks Food, flavors, oils General laboratories with multi-technique demands

Condition: used, This listing is for the Thermo Scientific Heratherm IMH180 Incubator The unit is in full working condition and is ready for immediate use The Thermo Scientific Heratherm IMH180 is a high-performance, reliable incubator tailored for demanding laboratory tasks: Precision: Excellent temperature control and uniformity. Flexibility: Adjustable airflow, generous interior volume, and timer options. Convenience: Viewing window, internal socket, and connectivity via RS‑232. Cleanability & Space Efficiency: Stainless steel interior and stackable design. Advanced Safety (Security Model): Door alarms, lockable access, and high-temperature decontamination. Perfect for microbiology, cell culture, pharmaceutical testing, and drying applications where sample integrity and process control are critical. Design & Functionality Dual Convection Technology: Offers adjustable fan speed from 0 % (natural convection) to 100 %, enabling tailored air circulation depending on the sample type or protocol Temperature Range: Operates from 5 °C above ambient up to 105 °C, making it suitable even for drying tasks Hnedsxhd Ixepfx Ag Neu Temperature Uniformity & Stability: With fan off: ±0.6 °C spatial uniformity With fan at full speed: ±0.2 °C to ±0.4 °C uniformity (at 37 °C) Temporal stability: ±0.1 °C (at 37 °C) Capacity & Build Interior Volume: 178 L (about 6.3 cubic feet) Shelving: Comes with 2 stainless-steel shelves (each supporting up to ~25 kg) and can accommodate up to 19 shelves for flexible arrangement Construction: Corrosion-resistant stainless steel interior (AISI 304) with easy-to-clean rounded corn Controls & Usability Controller: Microprocessor-based with a clear vacuum fluorescent display for easy setting of temperature, timers, and monitoring Timer Functionality: Programmable daily, weekly, or real-time ON/OFF cycles for scheduling experiments Extras: Internal power socket (120 V models) for operating devices like shakers or stirrers inside the chamber Internal glass viewing door and optional internal lighting for observing samples without opening the chamber RS‑232 interface for data logging and connectivity Stackable design without tools—efficient laboratory space use Safety & Maintenance Alarms: Automatic over- and under-temperature alert system protects sample integrity Security Model (IMH180‑S): Adds a lockable outer door and audible alarms for door‑open conditions Includes a certified 140 °C decontamination cycle (about six hours) to sterilize the chamber without needing an autoclave—ideal for high‑sterility environments Dimensions & Electrical Specs Feature Specification Exterior (W × D × H) 64 × 74 × 92 cm (25.2 × 29.1 × 36.2 in) Interior (W × D × H) ~46 × 54 × 70 cm (18.3 × 21.4 × 27.9 in) Weight ~70 kg (154 lb) Electrical (120 V) 1,020–1,390 W; 8.5 A at 60 Hz Materials Stainless steel (interior), durable housin

Condition: used, This listing is for the UXF300 Revco UXF Freezer The unit is in full working condition and is ready for immediate use Design & Build Robust upright footprint with high storage density: The UXF300 offers around 14.9 cu ft (421 L) of internal volume while maintaining a compact footprint—thanks to advanced insulation that increases vial capacity by up to 4.2%, translating to 76% more storage within the same space. Hsdpfx Agjxhd Hhe Nsnu Single outer door with multiple inner layers: The outer door integrates a heated 4×7 gasket (four touchpoints, seven protective zones) to prevent frost and temperature loss. Inside, five polystyrene-insulated inner doors further conserve cold when accessing samples. Controls & Monitoring Touch-screen control panel: The intuitive display allows adjustment of settings, user authority levels, and monitoring of freezer health around the clock. Extensive data logging: Built-in storage holds up to 15 years of temperature and event logs, which can be exported via USB. Remote integration: Supports 4–20 mA output or RS485 interfaces, making setup of external alarms and monitoring easy. Performance & Reliability Two performance modes: High‑performance mode provides tightest temperature uniformity and minimal fluctuation. Energy‑savings mode maintains acceptable control while saving up to 15% of energy